./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.c --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 22:45:44,713 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 22:45:44,825 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 22:45:44,831 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 22:45:44,831 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 22:45:44,858 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 22:45:44,864 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 22:45:44,864 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 22:45:44,865 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 22:45:44,869 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 22:45:44,869 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 22:45:44,869 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 22:45:44,870 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 22:45:44,871 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 22:45:44,871 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 22:45:44,872 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 22:45:44,872 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 22:45:44,872 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 22:45:44,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 22:45:44,873 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 22:45:44,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 22:45:44,873 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 22:45:44,874 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 22:45:44,874 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 22:45:44,874 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 22:45:44,875 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 22:45:44,875 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 22:45:44,875 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 22:45:44,876 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 22:45:44,876 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 22:45:44,877 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 22:45:44,877 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 22:45:44,877 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 22:45:44,878 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 22:45:44,878 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 22:45:44,878 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 22:45:44,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 22:45:44,879 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 22:45:44,879 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 22:45:44,879 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 22:45:44,879 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 22:45:44,880 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 22:45:44,880 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/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 22:45:45,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 22:45:45,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 22:45:45,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 22:45:45,154 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 22:45:45,155 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 22:45:45,156 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.c [2023-11-22 22:45:46,320 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 22:45:46,471 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 22:45:46,473 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.c [2023-11-22 22:45:46,482 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69f70d30e/c1791516452b40eea6b4182530a2c49a/FLAG914d648a7 [2023-11-22 22:45:46,496 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69f70d30e/c1791516452b40eea6b4182530a2c49a [2023-11-22 22:45:46,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 22:45:46,500 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 22:45:46,503 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 22:45:46,503 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 22:45:46,508 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 22:45:46,508 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,510 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bfca2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46, skipping insertion in model container [2023-11-22 22:45:46,510 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,536 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 22:45:46,684 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2023-11-22 22:45:46,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 22:45:46,723 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 22:45:46,733 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2023-11-22 22:45:46,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 22:45:46,776 INFO L206 MainTranslator]: Completed translation [2023-11-22 22:45:46,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46 WrapperNode [2023-11-22 22:45:46,779 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 22:45:46,780 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 22:45:46,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 22:45:46,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 22:45:46,787 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,795 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,818 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-11-22 22:45:46,818 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 22:45:46,819 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 22:45:46,819 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 22:45:46,819 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 22:45:46,829 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,829 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,832 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,844 INFO L189 HeapSplitter]: Split 49 memory accesses to 7 slices as follows [2, 6, 8, 10, 8, 5, 10] [2023-11-22 22:45:46,845 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,845 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,851 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,855 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,856 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,859 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 22:45:46,860 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 22:45:46,860 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 22:45:46,860 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 22:45:46,861 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46" (1/1) ... [2023-11-22 22:45:46,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 22:45:46,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:45:46,913 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 22:45:46,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 22:45:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 22:45:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 22:45:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 22:45:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 22:45:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-22 22:45:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-22 22:45:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-22 22:45:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-22 22:45:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 22:45:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_52_0 [2023-11-22 22:45:46,978 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_52_0 [2023-11-22 22:45:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_55_0 [2023-11-22 22:45:46,979 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_55_0 [2023-11-22 22:45:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 22:45:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 22:45:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 22:45:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-22 22:45:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-22 22:45:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-22 22:45:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-22 22:45:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 22:45:46,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 22:45:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 22:45:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 22:45:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 22:45:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-22 22:45:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-22 22:45:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-22 22:45:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-22 22:45:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-22 22:45:46,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-22 22:45:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 22:45:47,105 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 22:45:47,107 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 22:45:47,317 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 22:45:47,363 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 22:45:47,363 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-22 22:45:47,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:45:47 BoogieIcfgContainer [2023-11-22 22:45:47,364 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 22:45:47,366 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 22:45:47,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 22:45:47,369 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 22:45:47,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 10:45:46" (1/3) ... [2023-11-22 22:45:47,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4057e346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:45:47, skipping insertion in model container [2023-11-22 22:45:47,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:46" (2/3) ... [2023-11-22 22:45:47,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4057e346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:45:47, skipping insertion in model container [2023-11-22 22:45:47,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:45:47" (3/3) ... [2023-11-22 22:45:47,372 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv-ll.c [2023-11-22 22:45:47,393 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 22:45:47,393 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 22:45:47,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 22:45:47,437 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@28b05f8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 22:45:47,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 22:45:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-22 22:45:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-22 22:45:47,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:45:47,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:45:47,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:45:47,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:45:47,455 INFO L85 PathProgramCache]: Analyzing trace with hash 779716243, now seen corresponding path program 1 times [2023-11-22 22:45:47,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:45:47,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137978876] [2023-11-22 22:45:47,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:47,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:45:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:45:47,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:45:47,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137978876] [2023-11-22 22:45:47,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-22 22:45:47,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253495339] [2023-11-22 22:45:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:47,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:47,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:45:47,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:45:47,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 22:45:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:45:47,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-22 22:45:47,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:45:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:45:47,781 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 22:45:47,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253495339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:45:47,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:45:47,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 22:45:47,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393844148] [2023-11-22 22:45:47,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:45:47,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 22:45:47,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:45:47,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 22:45:47,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 22:45:47,816 INFO L87 Difference]: Start difference. First operand has 40 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:45:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:45:47,856 INFO L93 Difference]: Finished difference Result 78 states and 114 transitions. [2023-11-22 22:45:47,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 22:45:47,862 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 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 10 [2023-11-22 22:45:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:45:47,869 INFO L225 Difference]: With dead ends: 78 [2023-11-22 22:45:47,869 INFO L226 Difference]: Without dead ends: 38 [2023-11-22 22:45:47,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 22:45:47,877 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:45:47,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:45:47,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-22 22:45:47,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-22 22:45:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 26 states have internal predecessors, (26), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-22 22:45:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2023-11-22 22:45:47,974 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2023-11-22 22:45:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:45:47,974 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-11-22 22:45:47,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:45:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2023-11-22 22:45:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-22 22:45:47,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:45:47,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:45:47,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 22:45:48,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-22 22:45:48,185 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:45:48,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:45:48,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1459774613, now seen corresponding path program 1 times [2023-11-22 22:45:48,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:45:48,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126702543] [2023-11-22 22:45:48,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:48,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:45:48,225 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:45:48,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592620382] [2023-11-22 22:45:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:48,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:48,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:45:48,228 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:45:48,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 22:45:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:45:48,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-22 22:45:48,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:45:48,417 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 [2023-11-22 22:45:48,432 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 [2023-11-22 22:45:48,440 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 [2023-11-22 22:45:48,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-22 22:45:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:45:48,568 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 22:45:48,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:45:48,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126702543] [2023-11-22 22:45:48,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:45:48,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592620382] [2023-11-22 22:45:48,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592620382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:45:48,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:45:48,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-22 22:45:48,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069628561] [2023-11-22 22:45:48,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:45:48,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:45:48,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:45:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:45:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:45:48,575 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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) [2023-11-22 22:45:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:45:48,761 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2023-11-22 22:45:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 22:45:48,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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 10 [2023-11-22 22:45:48,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:45:48,766 INFO L225 Difference]: With dead ends: 55 [2023-11-22 22:45:48,767 INFO L226 Difference]: Without dead ends: 53 [2023-11-22 22:45:48,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-22 22:45:48,773 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:45:48,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 236 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 22:45:48,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-22 22:45:48,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-11-22 22:45:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-22 22:45:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2023-11-22 22:45:48,786 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 10 [2023-11-22 22:45:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:45:48,786 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2023-11-22 22:45:48,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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) [2023-11-22 22:45:48,786 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2023-11-22 22:45:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-22 22:45:48,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:45:48,787 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:45:48,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 22:45:49,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-22 22:45:49,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:45:49,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:45:49,002 INFO L85 PathProgramCache]: Analyzing trace with hash -860720822, now seen corresponding path program 1 times [2023-11-22 22:45:49,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:45:49,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269757183] [2023-11-22 22:45:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:49,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:45:49,043 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:45:49,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251302797] [2023-11-22 22:45:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:49,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:49,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:45:49,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:45:49,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 22:45:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:45:49,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-22 22:45:49,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:45:49,164 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 [2023-11-22 22:45:49,169 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 [2023-11-22 22:45:49,180 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 15 treesize of output 11 [2023-11-22 22:45:49,184 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 [2023-11-22 22:45:49,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2023-11-22 22:45:49,359 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 15 treesize of output 7 [2023-11-22 22:45:49,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-22 22:45:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:45:49,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:45:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:45:49,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:45:49,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269757183] [2023-11-22 22:45:49,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:45:49,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251302797] [2023-11-22 22:45:49,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251302797] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:45:49,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:45:49,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2023-11-22 22:45:49,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978037632] [2023-11-22 22:45:49,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:45:49,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:45:49,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:45:49,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:45:49,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-22 22:45:49,549 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 22:45:49,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:45:49,781 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2023-11-22 22:45:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 22:45:49,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-22 22:45:49,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:45:49,784 INFO L225 Difference]: With dead ends: 60 [2023-11-22 22:45:49,784 INFO L226 Difference]: Without dead ends: 58 [2023-11-22 22:45:49,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-22 22:45:49,785 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:45:49,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 223 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:45:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-22 22:45:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2023-11-22 22:45:49,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-22 22:45:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-11-22 22:45:49,796 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 16 [2023-11-22 22:45:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:45:49,797 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-11-22 22:45:49,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 22:45:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-11-22 22:45:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-22 22:45:49,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:45:49,798 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:45:49,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 22:45:50,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:50,013 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:45:50,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:45:50,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1771378809, now seen corresponding path program 1 times [2023-11-22 22:45:50,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:45:50,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251051244] [2023-11-22 22:45:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:50,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:45:50,040 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:45:50,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570310001] [2023-11-22 22:45:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:50,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:50,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:45:50,054 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:45:50,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 22:45:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:45:50,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-22 22:45:50,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:45:50,182 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 [2023-11-22 22:45:50,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 22:45:50,193 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 [2023-11-22 22:45:50,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2023-11-22 22:45:50,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 22:45:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:45:50,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 22:45:50,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:45:50,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251051244] [2023-11-22 22:45:50,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:45:50,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570310001] [2023-11-22 22:45:50,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570310001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:45:50,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:45:50,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-22 22:45:50,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449449094] [2023-11-22 22:45:50,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:45:50,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:45:50,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:45:50,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:45:50,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:45:50,274 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 22:45:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:45:50,459 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2023-11-22 22:45:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 22:45:50,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-11-22 22:45:50,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:45:50,462 INFO L225 Difference]: With dead ends: 76 [2023-11-22 22:45:50,462 INFO L226 Difference]: Without dead ends: 74 [2023-11-22 22:45:50,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-22 22:45:50,463 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:45:50,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 214 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 22:45:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-22 22:45:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2023-11-22 22:45:50,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 48 states have internal predecessors, (50), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2023-11-22 22:45:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2023-11-22 22:45:50,484 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 26 [2023-11-22 22:45:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:45:50,485 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2023-11-22 22:45:50,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 22:45:50,485 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2023-11-22 22:45:50,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-22 22:45:50,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:45:50,486 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:45:50,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 22:45:50,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:50,699 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:45:50,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:45:50,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1321931825, now seen corresponding path program 1 times [2023-11-22 22:45:50,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:45:50,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874776979] [2023-11-22 22:45:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:50,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:45:50,726 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:45:50,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348429056] [2023-11-22 22:45:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:50,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:50,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:45:50,728 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:45:50,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 22:45:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:45:50,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 22:45:50,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:45:50,859 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 [2023-11-22 22:45:50,862 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 [2023-11-22 22:45:50,866 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 11 treesize of output 7 [2023-11-22 22:45:50,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 22:45:50,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2023-11-22 22:45:50,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 22:45:50,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-22 22:45:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:45:50,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 22:45:50,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:45:50,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874776979] [2023-11-22 22:45:50,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:45:50,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348429056] [2023-11-22 22:45:50,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348429056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:45:50,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:45:50,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 22:45:50,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144068309] [2023-11-22 22:45:50,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:45:50,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 22:45:50,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:45:50,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 22:45:50,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:45:50,999 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 22:45:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:45:51,198 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2023-11-22 22:45:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:45:51,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-22 22:45:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:45:51,200 INFO L225 Difference]: With dead ends: 80 [2023-11-22 22:45:51,200 INFO L226 Difference]: Without dead ends: 70 [2023-11-22 22:45:51,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-22 22:45:51,201 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:45:51,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:45:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-22 22:45:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-22 22:45:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 47 states have internal predecessors, (49), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2023-11-22 22:45:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2023-11-22 22:45:51,219 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 26 [2023-11-22 22:45:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:45:51,219 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2023-11-22 22:45:51,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 22:45:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2023-11-22 22:45:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-22 22:45:51,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:45:51,224 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:45:51,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 22:45:51,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:51,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:45:51,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:45:51,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1358287025, now seen corresponding path program 1 times [2023-11-22 22:45:51,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:45:51,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261616794] [2023-11-22 22:45:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:51,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:45:51,463 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:45:51,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811130155] [2023-11-22 22:45:51,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:51,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:51,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:45:51,470 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:45:51,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 22:45:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:45:51,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-22 22:45:51,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:45:51,604 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 [2023-11-22 22:45:51,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 22:45:51,615 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 [2023-11-22 22:45:51,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2023-11-22 22:45:51,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 22:45:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 22:45:51,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:45:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 22:45:52,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:45:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261616794] [2023-11-22 22:45:52,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:45:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811130155] [2023-11-22 22:45:52,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811130155] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:45:52,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:45:52,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 11 [2023-11-22 22:45:52,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294656526] [2023-11-22 22:45:52,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:45:52,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-22 22:45:52,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:45:52,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-22 22:45:52,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-22 22:45:52,033 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 22:45:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:45:52,306 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2023-11-22 22:45:52,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 22:45:52,306 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-11-22 22:45:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:45:52,308 INFO L225 Difference]: With dead ends: 105 [2023-11-22 22:45:52,308 INFO L226 Difference]: Without dead ends: 103 [2023-11-22 22:45:52,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-22 22:45:52,309 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:45:52,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 230 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:45:52,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-22 22:45:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2023-11-22 22:45:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.09375) internal successors, (70), 68 states have internal predecessors, (70), 25 states have call successors, (25), 11 states have call predecessors, (25), 12 states have return successors, (30), 23 states have call predecessors, (30), 24 states have call successors, (30) [2023-11-22 22:45:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2023-11-22 22:45:52,324 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 32 [2023-11-22 22:45:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:45:52,325 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2023-11-22 22:45:52,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 22:45:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2023-11-22 22:45:52,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-22 22:45:52,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:45:52,326 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:45:52,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 22:45:52,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:52,547 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:45:52,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:45:52,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1087391719, now seen corresponding path program 1 times [2023-11-22 22:45:52,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:45:52,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478338127] [2023-11-22 22:45:52,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:52,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:45:52,580 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:45:52,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389610186] [2023-11-22 22:45:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:52,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:52,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:45:52,583 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:45:52,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 22:45:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:45:52,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-22 22:45:52,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:45:52,745 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 [2023-11-22 22:45:52,773 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 [2023-11-22 22:45:52,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 22:45:52,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 22:45:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-22 22:45:53,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:45:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 22:45:53,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:45:53,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478338127] [2023-11-22 22:45:53,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:45:53,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389610186] [2023-11-22 22:45:53,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389610186] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:45:53,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:45:53,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 25 [2023-11-22 22:45:53,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141512388] [2023-11-22 22:45:53,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:45:53,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 22:45:53,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:45:53,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 22:45:53,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2023-11-22 22:45:53,302 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 22:45:53,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:45:53,678 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2023-11-22 22:45:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 22:45:53,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-11-22 22:45:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:45:53,680 INFO L225 Difference]: With dead ends: 109 [2023-11-22 22:45:53,680 INFO L226 Difference]: Without dead ends: 107 [2023-11-22 22:45:53,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2023-11-22 22:45:53,681 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:45:53,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 239 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:45:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-22 22:45:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2023-11-22 22:45:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 71 states have internal predecessors, (73), 25 states have call successors, (25), 12 states have call predecessors, (25), 13 states have return successors, (30), 23 states have call predecessors, (30), 24 states have call successors, (30) [2023-11-22 22:45:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2023-11-22 22:45:53,697 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 38 [2023-11-22 22:45:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:45:53,697 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2023-11-22 22:45:53,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 22:45:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2023-11-22 22:45:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-22 22:45:53,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:45:53,699 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:45:53,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 22:45:53,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:53,913 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:45:53,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:45:53,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1075242647, now seen corresponding path program 1 times [2023-11-22 22:45:53,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:45:53,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708134422] [2023-11-22 22:45:53,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:53,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:45:53,940 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:45:53,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893265685] [2023-11-22 22:45:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:53,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:53,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:45:53,942 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:45:53,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 22:45:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:45:54,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-22 22:45:54,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:45:54,095 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 [2023-11-22 22:45:54,096 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 [2023-11-22 22:45:54,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2023-11-22 22:45:54,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 22:45:54,108 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 [2023-11-22 22:45:54,113 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 [2023-11-22 22:45:54,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-22 22:45:56,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-22 22:45:56,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2023-11-22 22:45:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-22 22:45:56,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:45:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-22 22:45:56,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:45:56,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708134422] [2023-11-22 22:45:56,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:45:56,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893265685] [2023-11-22 22:45:56,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893265685] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:45:56,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:45:56,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 15 [2023-11-22 22:45:56,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112085205] [2023-11-22 22:45:56,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:45:56,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 22:45:56,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:45:56,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 22:45:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2023-11-22 22:45:56,804 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 22:45:57,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:45:57,125 INFO L93 Difference]: Finished difference Result 117 states and 140 transitions. [2023-11-22 22:45:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 22:45:57,128 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2023-11-22 22:45:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:45:57,130 INFO L225 Difference]: With dead ends: 117 [2023-11-22 22:45:57,130 INFO L226 Difference]: Without dead ends: 115 [2023-11-22 22:45:57,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=57, Invalid=284, Unknown=1, NotChecked=0, Total=342 [2023-11-22 22:45:57,131 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:45:57,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 229 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:45:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-22 22:45:57,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2023-11-22 22:45:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 76 states have internal predecessors, (76), 27 states have call successors, (27), 13 states have call predecessors, (27), 14 states have return successors, (32), 23 states have call predecessors, (32), 26 states have call successors, (32) [2023-11-22 22:45:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2023-11-22 22:45:57,148 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 45 [2023-11-22 22:45:57,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:45:57,148 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2023-11-22 22:45:57,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 22:45:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2023-11-22 22:45:57,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-22 22:45:57,150 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:45:57,150 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:45:57,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 22:45:57,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-22 22:45:57,367 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:45:57,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:45:57,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1953050054, now seen corresponding path program 1 times [2023-11-22 22:45:57,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:45:57,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470263350] [2023-11-22 22:45:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:57,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:45:57,385 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:45:57,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798840980] [2023-11-22 22:45:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:57,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:57,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:45:57,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:45:57,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 22:45:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:45:57,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-22 22:45:57,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:45:57,560 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 [2023-11-22 22:45:57,565 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 [2023-11-22 22:45:57,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 22:45:57,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2023-11-22 22:45:57,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 22:45:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-22 22:45:57,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 22:45:57,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:45:57,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470263350] [2023-11-22 22:45:57,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:45:57,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798840980] [2023-11-22 22:45:57,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798840980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:45:57,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:45:57,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-22 22:45:57,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965788002] [2023-11-22 22:45:57,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:45:57,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:45:57,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:45:57,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:45:57,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:45:57,731 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-22 22:45:58,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:45:58,082 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2023-11-22 22:45:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 22:45:58,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2023-11-22 22:45:58,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:45:58,084 INFO L225 Difference]: With dead ends: 138 [2023-11-22 22:45:58,084 INFO L226 Difference]: Without dead ends: 136 [2023-11-22 22:45:58,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-22 22:45:58,085 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 33 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 22:45:58,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 119 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 22:45:58,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-22 22:45:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2023-11-22 22:45:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 90 states have internal predecessors, (90), 32 states have call successors, (32), 15 states have call predecessors, (32), 18 states have return successors, (43), 29 states have call predecessors, (43), 31 states have call successors, (43) [2023-11-22 22:45:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 165 transitions. [2023-11-22 22:45:58,103 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 165 transitions. Word has length 51 [2023-11-22 22:45:58,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:45:58,103 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 165 transitions. [2023-11-22 22:45:58,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-22 22:45:58,104 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 165 transitions. [2023-11-22 22:45:58,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-22 22:45:58,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:45:58,105 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:45:58,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 22:45:58,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:58,313 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:45:58,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:45:58,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1796395648, now seen corresponding path program 1 times [2023-11-22 22:45:58,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:45:58,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442683483] [2023-11-22 22:45:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:58,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:45:58,331 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:45:58,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4467038] [2023-11-22 22:45:58,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:58,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:58,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:45:58,333 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:45:58,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 22:45:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:45:58,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-22 22:45:58,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:45:58,510 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 [2023-11-22 22:45:58,516 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 [2023-11-22 22:45:58,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 22:45:58,754 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 29 treesize of output 17 [2023-11-22 22:45:58,760 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 [2023-11-22 22:45:58,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-22 22:45:58,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-22 22:45:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 22:45:58,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:45:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-22 22:45:59,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:45:59,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442683483] [2023-11-22 22:45:59,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:45:59,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4467038] [2023-11-22 22:45:59,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4467038] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:45:59,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:45:59,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2023-11-22 22:45:59,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209034386] [2023-11-22 22:45:59,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 22:45:59,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 22:45:59,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:45:59,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 22:45:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-22 22:45:59,044 INFO L87 Difference]: Start difference. First operand 134 states and 165 transitions. Second operand has 15 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 8 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-22 22:45:59,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:45:59,630 INFO L93 Difference]: Finished difference Result 194 states and 238 transitions. [2023-11-22 22:45:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-22 22:45:59,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 8 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 54 [2023-11-22 22:45:59,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:45:59,632 INFO L225 Difference]: With dead ends: 194 [2023-11-22 22:45:59,632 INFO L226 Difference]: Without dead ends: 192 [2023-11-22 22:45:59,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-11-22 22:45:59,633 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 86 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 22:45:59,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 338 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 22:45:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-22 22:45:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 186. [2023-11-22 22:45:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 116 states have (on average 1.0862068965517242) internal successors, (126), 123 states have internal predecessors, (126), 41 states have call successors, (41), 21 states have call predecessors, (41), 28 states have return successors, (62), 42 states have call predecessors, (62), 39 states have call successors, (62) [2023-11-22 22:45:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 229 transitions. [2023-11-22 22:45:59,658 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 229 transitions. Word has length 54 [2023-11-22 22:45:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:45:59,659 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 229 transitions. [2023-11-22 22:45:59,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 8 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-22 22:45:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 229 transitions. [2023-11-22 22:45:59,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-22 22:45:59,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:45:59,661 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:45:59,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 22:45:59,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-22 22:45:59,872 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:45:59,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:45:59,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1439706693, now seen corresponding path program 2 times [2023-11-22 22:45:59,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:45:59,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005595195] [2023-11-22 22:45:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:45:59,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:45:59,888 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:45:59,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487491637] [2023-11-22 22:45:59,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:45:59,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:45:59,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:45:59,889 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:45:59,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 22:46:00,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:46:00,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:46:00,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 146 conjunts are in the unsatisfiable core [2023-11-22 22:46:00,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:46:00,094 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 [2023-11-22 22:46:00,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 22:46:00,115 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 [2023-11-22 22:46:00,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 22:46:00,363 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 [2023-11-22 22:46:00,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 22:46:00,593 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 [2023-11-22 22:46:00,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-11-22 22:46:00,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2023-11-22 22:46:00,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-22 22:46:00,815 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 28 treesize of output 16 [2023-11-22 22:46:00,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-11-22 22:46:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-22 22:46:00,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:46:07,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:46:07,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005595195] [2023-11-22 22:46:07,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:46:07,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487491637] [2023-11-22 22:46:07,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487491637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:46:07,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:46:07,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-22 22:46:07,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007668044] [2023-11-22 22:46:07,393 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 22:46:07,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 22:46:07,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:46:07,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 22:46:07,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=442, Unknown=3, NotChecked=0, Total=506 [2023-11-22 22:46:07,395 INFO L87 Difference]: Start difference. First operand 186 states and 229 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-22 22:46:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:46:09,223 INFO L93 Difference]: Finished difference Result 304 states and 360 transitions. [2023-11-22 22:46:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-22 22:46:09,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 57 [2023-11-22 22:46:09,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:46:09,226 INFO L225 Difference]: With dead ends: 304 [2023-11-22 22:46:09,227 INFO L226 Difference]: Without dead ends: 302 [2023-11-22 22:46:09,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=164, Invalid=1023, Unknown=3, NotChecked=0, Total=1190 [2023-11-22 22:46:09,229 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 96 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 69 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:46:09,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 171 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 820 Invalid, 11 Unknown, 0 Unchecked, 1.2s Time] [2023-11-22 22:46:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-22 22:46:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 295. [2023-11-22 22:46:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 186 states have (on average 1.0913978494623655) internal successors, (203), 196 states have internal predecessors, (203), 59 states have call successors, (59), 36 states have call predecessors, (59), 49 states have return successors, (91), 62 states have call predecessors, (91), 56 states have call successors, (91) [2023-11-22 22:46:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 353 transitions. [2023-11-22 22:46:09,279 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 353 transitions. Word has length 57 [2023-11-22 22:46:09,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:46:09,280 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 353 transitions. [2023-11-22 22:46:09,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-22 22:46:09,280 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 353 transitions. [2023-11-22 22:46:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-22 22:46:09,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:46:09,283 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:46:09,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 22:46:09,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-22 22:46:09,500 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:46:09,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:46:09,500 INFO L85 PathProgramCache]: Analyzing trace with hash 174167689, now seen corresponding path program 1 times [2023-11-22 22:46:09,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:46:09,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605062979] [2023-11-22 22:46:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:46:09,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:46:09,515 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:46:09,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647729920] [2023-11-22 22:46:09,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:46:09,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:46:09,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:46:09,517 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:46:09,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 22:46:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:46:09,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 155 conjunts are in the unsatisfiable core [2023-11-22 22:46:09,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:46:09,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 22:46:09,711 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 [2023-11-22 22:46:09,720 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 [2023-11-22 22:46:09,725 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 [2023-11-22 22:46:10,126 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 [2023-11-22 22:46:10,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 22:46:10,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 32 [2023-11-22 22:46:11,586 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2023-11-22 22:46:11,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 62 [2023-11-22 22:46:11,728 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 [2023-11-22 22:46:11,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 107 [2023-11-22 22:46:11,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:46:11,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 111 [2023-11-22 22:46:11,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 59 [2023-11-22 22:46:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 39 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-22 22:46:12,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:46:14,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:46:14,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605062979] [2023-11-22 22:46:14,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:46:14,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647729920] [2023-11-22 22:46:14,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647729920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:46:14,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:46:14,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-22 22:46:14,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983917256] [2023-11-22 22:46:14,353 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 22:46:14,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 22:46:14,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:46:14,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 22:46:14,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2023-11-22 22:46:14,354 INFO L87 Difference]: Start difference. First operand 295 states and 353 transitions. Second operand has 23 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-22 22:46:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:46:16,991 INFO L93 Difference]: Finished difference Result 305 states and 364 transitions. [2023-11-22 22:46:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-22 22:46:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2023-11-22 22:46:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:46:16,993 INFO L225 Difference]: With dead ends: 305 [2023-11-22 22:46:16,993 INFO L226 Difference]: Without dead ends: 293 [2023-11-22 22:46:16,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=196, Invalid=1609, Unknown=1, NotChecked=0, Total=1806 [2023-11-22 22:46:16,995 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 26 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-22 22:46:16,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 153 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 767 Invalid, 12 Unknown, 0 Unchecked, 1.3s Time] [2023-11-22 22:46:16,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-11-22 22:46:17,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2023-11-22 22:46:17,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 184 states have (on average 1.0869565217391304) internal successors, (200), 193 states have internal predecessors, (200), 58 states have call successors, (58), 36 states have call predecessors, (58), 48 states have return successors, (90), 61 states have call predecessors, (90), 56 states have call successors, (90) [2023-11-22 22:46:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 348 transitions. [2023-11-22 22:46:17,050 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 348 transitions. Word has length 69 [2023-11-22 22:46:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:46:17,051 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 348 transitions. [2023-11-22 22:46:17,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-22 22:46:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 348 transitions. [2023-11-22 22:46:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-22 22:46:17,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:46:17,052 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:46:17,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 22:46:17,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-22 22:46:17,269 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:46:17,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:46:17,269 INFO L85 PathProgramCache]: Analyzing trace with hash -2118021584, now seen corresponding path program 2 times [2023-11-22 22:46:17,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:46:17,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463088157] [2023-11-22 22:46:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:46:17,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:46:17,294 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:46:17,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483837525] [2023-11-22 22:46:17,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:46:17,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:46:17,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:46:17,296 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:46:17,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 22:46:17,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:46:17,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:46:17,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-22 22:46:17,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:46:17,556 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 [2023-11-22 22:46:19,795 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_41_to_52_0_~b.offset_BEFORE_CALL_20 Int) (v_func_to_recursive_line_41_to_52_0_~a.base_BEFORE_CALL_17 Int) (v_func_to_recursive_line_41_to_52_0_~a.offset_BEFORE_CALL_17 Int) (v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_18 Int) (v_func_to_recursive_line_41_to_52_0_~b.base_BEFORE_CALL_20 Int)) (<= (* (select (select |c_#memory_int#6| v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_18) 0) (select (select |c_#memory_int#2| v_func_to_recursive_line_41_to_52_0_~a.base_BEFORE_CALL_17) v_func_to_recursive_line_41_to_52_0_~a.offset_BEFORE_CALL_17)) (select (select |c_#memory_int#4| v_func_to_recursive_line_41_to_52_0_~b.base_BEFORE_CALL_20) v_func_to_recursive_line_41_to_52_0_~b.offset_BEFORE_CALL_20))) is different from true [2023-11-22 22:46:21,853 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_41_to_52_0_~b.offset_BEFORE_CALL_21 Int) (v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_19 Int) (v_func_to_recursive_line_41_to_52_0_~a.base_BEFORE_CALL_18 Int) (v_func_to_recursive_line_41_to_52_0_~b.base_BEFORE_CALL_21 Int) (v_func_to_recursive_line_41_to_52_0_~a.offset_BEFORE_CALL_18 Int)) (<= (* (select (select |c_#memory_int#2| v_func_to_recursive_line_41_to_52_0_~a.base_BEFORE_CALL_18) v_func_to_recursive_line_41_to_52_0_~a.offset_BEFORE_CALL_18) (select (select |c_#memory_int#6| v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_19) 0)) (select (select |c_#memory_int#4| v_func_to_recursive_line_41_to_52_0_~b.base_BEFORE_CALL_21) v_func_to_recursive_line_41_to_52_0_~b.offset_BEFORE_CALL_21))) is different from true [2023-11-22 22:46:21,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-22 22:46:21,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2023-11-22 22:46:21,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-22 22:46:21,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-22 22:46:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 14 not checked. [2023-11-22 22:46:22,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:46:22,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-11-22 22:46:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 43 proven. 7 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-11-22 22:46:22,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:46:22,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463088157] [2023-11-22 22:46:22,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:46:22,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483837525] [2023-11-22 22:46:22,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483837525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:46:22,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:46:22,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 24 [2023-11-22 22:46:22,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707882950] [2023-11-22 22:46:22,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 22:46:22,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-22 22:46:22,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:46:22,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-22 22:46:22,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=406, Unknown=2, NotChecked=82, Total=552 [2023-11-22 22:46:22,348 INFO L87 Difference]: Start difference. First operand 291 states and 348 transitions. Second operand has 24 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 9 states have call successors, (26), 7 states have call predecessors, (26), 5 states have return successors, (18), 5 states have call predecessors, (18), 7 states have call successors, (18) [2023-11-22 22:46:37,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:46:37,303 INFO L93 Difference]: Finished difference Result 313 states and 369 transitions. [2023-11-22 22:46:37,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-22 22:46:37,303 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 9 states have call successors, (26), 7 states have call predecessors, (26), 5 states have return successors, (18), 5 states have call predecessors, (18), 7 states have call successors, (18) Word has length 73 [2023-11-22 22:46:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:46:37,305 INFO L225 Difference]: With dead ends: 313 [2023-11-22 22:46:37,305 INFO L226 Difference]: Without dead ends: 311 [2023-11-22 22:46:37,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=148, Invalid=909, Unknown=7, NotChecked=126, Total=1190 [2023-11-22 22:46:37,306 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 22:46:37,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 225 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 456 Invalid, 0 Unknown, 146 Unchecked, 0.5s Time] [2023-11-22 22:46:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-22 22:46:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2023-11-22 22:46:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 196 states have (on average 1.086734693877551) internal successors, (213), 205 states have internal predecessors, (213), 58 states have call successors, (58), 40 states have call predecessors, (58), 52 states have return successors, (90), 61 states have call predecessors, (90), 56 states have call successors, (90) [2023-11-22 22:46:37,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 361 transitions. [2023-11-22 22:46:37,379 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 361 transitions. Word has length 73 [2023-11-22 22:46:37,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:46:37,379 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 361 transitions. [2023-11-22 22:46:37,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 9 states have call successors, (26), 7 states have call predecessors, (26), 5 states have return successors, (18), 5 states have call predecessors, (18), 7 states have call successors, (18) [2023-11-22 22:46:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 361 transitions. [2023-11-22 22:46:37,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-22 22:46:37,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:46:37,381 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:46:37,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-22 22:46:37,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-22 22:46:37,601 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:46:37,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:46:37,601 INFO L85 PathProgramCache]: Analyzing trace with hash -491901150, now seen corresponding path program 3 times [2023-11-22 22:46:37,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:46:37,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791378873] [2023-11-22 22:46:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:46:37,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:46:37,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:46:37,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855937503] [2023-11-22 22:46:37,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:46:37,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:46:37,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:46:37,620 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:46:37,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-22 22:46:37,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-22 22:46:37,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:46:37,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 165 conjunts are in the unsatisfiable core [2023-11-22 22:46:37,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:46:38,199 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 [2023-11-22 22:46:38,206 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 21 treesize of output 17 [2023-11-22 22:46:38,211 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 [2023-11-22 22:46:40,556 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_41_to_52_0_~q.base_BEFORE_CALL_3 Int) (v_func_to_recursive_line_41_to_52_0_~r.base_BEFORE_CALL_11 Int) (v_func_to_recursive_line_41_to_52_0_~x.base_BEFORE_CALL_3 Int) (v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_23 Int)) (= (select (select |c_#memory_int#5| v_func_to_recursive_line_41_to_52_0_~x.base_BEFORE_CALL_3) 0) (+ (select (select |c_#memory_int#3| v_func_to_recursive_line_41_to_52_0_~r.base_BEFORE_CALL_11) 0) (* (select (select |c_#memory_int#6| v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_23) 0) (select (select |c_#memory_int#1| v_func_to_recursive_line_41_to_52_0_~q.base_BEFORE_CALL_3) 0))))) is different from true [2023-11-22 22:46:40,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2023-11-22 22:46:40,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-11-22 22:46:40,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-22 22:46:40,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-22 22:46:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 5 refuted. 0 times theorem prover too weak. 58 trivial. 8 not checked. [2023-11-22 22:46:40,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:46:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 42 proven. 4 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-22 22:46:41,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:46:41,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791378873] [2023-11-22 22:46:41,174 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:46:41,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855937503] [2023-11-22 22:46:41,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855937503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:46:41,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:46:41,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2023-11-22 22:46:41,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101716627] [2023-11-22 22:46:41,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 22:46:41,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 22:46:41,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:46:41,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 22:46:41,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=405, Unknown=1, NotChecked=40, Total=506 [2023-11-22 22:46:41,176 INFO L87 Difference]: Start difference. First operand 307 states and 361 transitions. Second operand has 23 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-22 22:46:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:46:52,324 INFO L93 Difference]: Finished difference Result 325 states and 378 transitions. [2023-11-22 22:46:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-22 22:46:52,325 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 73 [2023-11-22 22:46:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:46:52,327 INFO L225 Difference]: With dead ends: 325 [2023-11-22 22:46:52,327 INFO L226 Difference]: Without dead ends: 323 [2023-11-22 22:46:52,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=134, Invalid=856, Unknown=6, NotChecked=60, Total=1056 [2023-11-22 22:46:52,328 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-22 22:46:52,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 209 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 439 Invalid, 0 Unknown, 76 Unchecked, 0.7s Time] [2023-11-22 22:46:52,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-22 22:46:52,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2023-11-22 22:46:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 208 states have (on average 1.0817307692307692) internal successors, (225), 217 states have internal predecessors, (225), 58 states have call successors, (58), 44 states have call predecessors, (58), 56 states have return successors, (90), 61 states have call predecessors, (90), 56 states have call successors, (90) [2023-11-22 22:46:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 373 transitions. [2023-11-22 22:46:52,393 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 373 transitions. Word has length 73 [2023-11-22 22:46:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:46:52,394 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 373 transitions. [2023-11-22 22:46:52,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-22 22:46:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 373 transitions. [2023-11-22 22:46:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-22 22:46:52,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:46:52,396 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:46:52,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-22 22:46:52,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:46:52,605 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:46:52,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:46:52,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1947578984, now seen corresponding path program 4 times [2023-11-22 22:46:52,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:46:52,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503987736] [2023-11-22 22:46:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:46:52,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:46:52,622 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:46:52,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258619780] [2023-11-22 22:46:52,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:46:52,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:46:52,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:46:52,624 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:46:52,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-22 22:46:52,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:46:52,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:46:52,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-22 22:46:52,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:46:52,819 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 [2023-11-22 22:46:52,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2023-11-22 22:46:52,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 22:46:52,906 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 [2023-11-22 22:46:53,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 22:46:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 96 proven. 17 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-22 22:46:53,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:46:53,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:46:53,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503987736] [2023-11-22 22:46:53,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:46:53,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258619780] [2023-11-22 22:46:53,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258619780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:46:53,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:46:53,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-22 22:46:53,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505317854] [2023-11-22 22:46:53,407 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 22:46:53,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 22:46:53,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:46:53,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 22:46:53,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-22 22:46:53,408 INFO L87 Difference]: Start difference. First operand 323 states and 373 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-22 22:46:55,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:46:57,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:46:59,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:47:01,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:47:04,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:47:06,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:47:08,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:47:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:47:08,672 INFO L93 Difference]: Finished difference Result 416 states and 481 transitions. [2023-11-22 22:47:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-22 22:47:08,672 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 79 [2023-11-22 22:47:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:47:08,674 INFO L225 Difference]: With dead ends: 416 [2023-11-22 22:47:08,674 INFO L226 Difference]: Without dead ends: 414 [2023-11-22 22:47:08,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 17 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2023-11-22 22:47:08,675 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 64 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 43 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2023-11-22 22:47:08,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 161 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 652 Invalid, 11 Unknown, 0 Unchecked, 14.9s Time] [2023-11-22 22:47:08,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-11-22 22:47:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 322. [2023-11-22 22:47:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 208 states have (on average 1.0721153846153846) internal successors, (223), 216 states have internal predecessors, (223), 57 states have call successors, (57), 44 states have call predecessors, (57), 56 states have return successors, (87), 61 states have call predecessors, (87), 55 states have call successors, (87) [2023-11-22 22:47:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 367 transitions. [2023-11-22 22:47:08,726 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 367 transitions. Word has length 79 [2023-11-22 22:47:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:47:08,726 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 367 transitions. [2023-11-22 22:47:08,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-22 22:47:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 367 transitions. [2023-11-22 22:47:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-22 22:47:08,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:47:08,727 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:47:08,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-22 22:47:08,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-22 22:47:08,928 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:47:08,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:47:08,928 INFO L85 PathProgramCache]: Analyzing trace with hash -385675091, now seen corresponding path program 1 times [2023-11-22 22:47:08,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:47:08,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040366806] [2023-11-22 22:47:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:47:08,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:47:08,943 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:47:08,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321928983] [2023-11-22 22:47:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:47:08,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:47:08,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:47:08,945 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:47:08,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-22 22:47:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:47:09,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 114 conjunts are in the unsatisfiable core [2023-11-22 22:47:09,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:47:09,159 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 [2023-11-22 22:47:09,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 22:47:09,167 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 [2023-11-22 22:47:09,716 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 [2023-11-22 22:47:09,722 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 29 treesize of output 17 [2023-11-22 22:47:09,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-22 22:47:09,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2023-11-22 22:47:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 26 proven. 29 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-22 22:47:09,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:47:10,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:47:10,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040366806] [2023-11-22 22:47:10,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:47:10,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321928983] [2023-11-22 22:47:10,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321928983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:47:10,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:47:10,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-22 22:47:10,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137427647] [2023-11-22 22:47:10,627 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 22:47:10,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 22:47:10,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:47:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 22:47:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-11-22 22:47:10,628 INFO L87 Difference]: Start difference. First operand 322 states and 367 transitions. Second operand has 15 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-22 22:47:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:47:11,439 INFO L93 Difference]: Finished difference Result 343 states and 401 transitions. [2023-11-22 22:47:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 22:47:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 81 [2023-11-22 22:47:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:47:11,441 INFO L225 Difference]: With dead ends: 343 [2023-11-22 22:47:11,441 INFO L226 Difference]: Without dead ends: 341 [2023-11-22 22:47:11,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-11-22 22:47:11,442 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 40 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-22 22:47:11,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 181 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-22 22:47:11,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-22 22:47:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 337. [2023-11-22 22:47:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 218 states have (on average 1.073394495412844) internal successors, (234), 226 states have internal predecessors, (234), 60 states have call successors, (60), 46 states have call predecessors, (60), 58 states have return successors, (94), 64 states have call predecessors, (94), 58 states have call successors, (94) [2023-11-22 22:47:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 388 transitions. [2023-11-22 22:47:11,501 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 388 transitions. Word has length 81 [2023-11-22 22:47:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:47:11,501 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 388 transitions. [2023-11-22 22:47:11,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-22 22:47:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 388 transitions. [2023-11-22 22:47:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-22 22:47:11,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:47:11,502 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:47:11,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-22 22:47:11,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-22 22:47:11,730 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:47:11,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:47:11,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2078823582, now seen corresponding path program 2 times [2023-11-22 22:47:11,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:47:11,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234554773] [2023-11-22 22:47:11,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:47:11,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:47:11,745 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:47:11,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111034739] [2023-11-22 22:47:11,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:47:11,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:47:11,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:47:11,747 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:47:11,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-22 22:47:11,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:47:11,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:47:11,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 185 conjunts are in the unsatisfiable core [2023-11-22 22:47:11,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:47:11,994 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 [2023-11-22 22:47:11,997 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 [2023-11-22 22:47:12,022 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 [2023-11-22 22:47:12,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 22:47:12,313 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 [2023-11-22 22:47:12,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 22:47:13,107 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 [2023-11-22 22:47:13,117 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 29 treesize of output 17 [2023-11-22 22:47:13,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-22 22:47:13,190 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 [2023-11-22 22:47:13,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2023-11-22 22:47:13,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2023-11-22 22:47:13,485 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 34 treesize of output 22 [2023-11-22 22:47:13,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-22 22:47:13,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2023-11-22 22:47:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 42 proven. 85 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-11-22 22:47:13,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:47:20,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:47:20,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234554773] [2023-11-22 22:47:20,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:47:20,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111034739] [2023-11-22 22:47:20,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111034739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:47:20,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:47:20,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-22 22:47:20,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412689954] [2023-11-22 22:47:20,510 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 22:47:20,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 22:47:20,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:47:20,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 22:47:20,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=527, Unknown=3, NotChecked=0, Total=600 [2023-11-22 22:47:20,512 INFO L87 Difference]: Start difference. First operand 337 states and 388 transitions. Second operand has 19 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 8 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-22 22:47:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:47:23,057 INFO L93 Difference]: Finished difference Result 450 states and 516 transitions. [2023-11-22 22:47:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-22 22:47:23,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 8 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 87 [2023-11-22 22:47:23,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:47:23,059 INFO L225 Difference]: With dead ends: 450 [2023-11-22 22:47:23,060 INFO L226 Difference]: Without dead ends: 446 [2023-11-22 22:47:23,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=194, Invalid=1525, Unknown=3, NotChecked=0, Total=1722 [2023-11-22 22:47:23,061 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 78 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 61 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-22 22:47:23,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 198 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 926 Invalid, 18 Unknown, 0 Unchecked, 1.5s Time] [2023-11-22 22:47:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-22 22:47:23,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 362. [2023-11-22 22:47:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 235 states have (on average 1.0723404255319149) internal successors, (252), 242 states have internal predecessors, (252), 64 states have call successors, (64), 50 states have call predecessors, (64), 62 states have return successors, (102), 69 states have call predecessors, (102), 61 states have call successors, (102) [2023-11-22 22:47:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 418 transitions. [2023-11-22 22:47:23,129 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 418 transitions. Word has length 87 [2023-11-22 22:47:23,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:47:23,130 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 418 transitions. [2023-11-22 22:47:23,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 8 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-22 22:47:23,130 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 418 transitions. [2023-11-22 22:47:23,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-22 22:47:23,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:47:23,132 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-22 22:47:23,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-22 22:47:23,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-22 22:47:23,349 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:47:23,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:47:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1796545430, now seen corresponding path program 5 times [2023-11-22 22:47:23,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:47:23,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093327889] [2023-11-22 22:47:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:47:23,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:47:23,381 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:47:23,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363728272] [2023-11-22 22:47:23,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:47:23,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:47:23,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:47:23,383 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:47:23,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-22 22:47:23,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-22 22:47:23,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:47:23,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 134 conjunts are in the unsatisfiable core [2023-11-22 22:47:23,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:47:23,655 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 [2023-11-22 22:47:23,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-11-22 22:47:23,669 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 [2023-11-22 22:47:25,965 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_15| Int)) (<= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_15|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_15|) (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_12|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_12|) (select (select |c_#memory_int#6| |v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_2|) |v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_2|)))) is different from true [2023-11-22 22:47:28,089 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_16| Int)) (<= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_16|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_16|) (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_13|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_13|) (select (select |c_#memory_int#6| |v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_3|) |v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_3|)))) is different from true [2023-11-22 22:47:28,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2023-11-22 22:47:28,320 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 53 treesize of output 26 [2023-11-22 22:47:32,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-22 22:47:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 198 proven. 7 refuted. 0 times theorem prover too weak. 42 trivial. 26 not checked. [2023-11-22 22:47:32,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:47:33,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:47:33,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093327889] [2023-11-22 22:47:33,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:47:33,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363728272] [2023-11-22 22:47:33,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363728272] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:47:33,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:47:33,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-22 22:47:33,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903608751] [2023-11-22 22:47:33,411 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 22:47:33,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 22:47:33,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:47:33,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 22:47:33,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=540, Unknown=3, NotChecked=94, Total=702 [2023-11-22 22:47:33,412 INFO L87 Difference]: Start difference. First operand 362 states and 418 transitions. Second operand has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 6 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-11-22 22:47:35,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:47:37,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:47:39,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:47:44,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-22 22:47:47,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:47:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:47:47,500 INFO L93 Difference]: Finished difference Result 503 states and 591 transitions. [2023-11-22 22:47:47,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-22 22:47:47,501 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 6 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 98 [2023-11-22 22:47:47,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:47:47,503 INFO L225 Difference]: With dead ends: 503 [2023-11-22 22:47:47,503 INFO L226 Difference]: Without dead ends: 261 [2023-11-22 22:47:47,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=196, Invalid=1612, Unknown=6, NotChecked=166, Total=1980 [2023-11-22 22:47:47,505 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 27 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:47:47,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 132 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 694 Invalid, 12 Unknown, 157 Unchecked, 11.0s Time] [2023-11-22 22:47:47,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-22 22:47:47,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 259. [2023-11-22 22:47:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 169 states have (on average 1.0710059171597632) internal successors, (181), 173 states have internal predecessors, (181), 46 states have call successors, (46), 36 states have call predecessors, (46), 43 states have return successors, (65), 49 states have call predecessors, (65), 43 states have call successors, (65) [2023-11-22 22:47:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 292 transitions. [2023-11-22 22:47:47,567 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 292 transitions. Word has length 98 [2023-11-22 22:47:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:47:47,569 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 292 transitions. [2023-11-22 22:47:47,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 6 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-11-22 22:47:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 292 transitions. [2023-11-22 22:47:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-22 22:47:47,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:47:47,571 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:47:47,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-22 22:47:47,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-22 22:47:47,789 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:47:47,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:47:47,789 INFO L85 PathProgramCache]: Analyzing trace with hash -372953680, now seen corresponding path program 1 times [2023-11-22 22:47:47,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:47:47,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683893843] [2023-11-22 22:47:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:47:47,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:47:47,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:47:47,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798752173] [2023-11-22 22:47:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:47:47,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:47:47,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:47:47,807 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:47:47,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-22 22:47:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:47:48,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 200 conjunts are in the unsatisfiable core [2023-11-22 22:47:48,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:47:48,049 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 [2023-11-22 22:47:48,052 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 [2023-11-22 22:47:48,058 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 [2023-11-22 22:47:48,065 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 [2023-11-22 22:47:48,408 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 [2023-11-22 22:47:48,479 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 [2023-11-22 22:47:49,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-22 22:47:49,688 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 [2023-11-22 22:47:49,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2023-11-22 22:47:50,736 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 [2023-11-22 22:47:50,795 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2023-11-22 22:47:50,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 72 [2023-11-22 22:47:51,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:47:51,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 443 treesize of output 447 [2023-11-22 22:47:51,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 267 [2023-11-22 22:47:51,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 239 [2023-11-22 22:47:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 75 proven. 20 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2023-11-22 22:47:52,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:47:55,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:47:55,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683893843] [2023-11-22 22:47:55,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:47:55,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798752173] [2023-11-22 22:47:55,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798752173] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:47:55,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:47:55,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-11-22 22:47:55,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386645522] [2023-11-22 22:47:55,671 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 22:47:55,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-22 22:47:55,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:47:55,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-22 22:47:55,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=826, Unknown=1, NotChecked=0, Total=930 [2023-11-22 22:47:55,673 INFO L87 Difference]: Start difference. First operand 259 states and 292 transitions. Second operand has 28 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 11 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-22 22:47:58,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:47:58,473 INFO L93 Difference]: Finished difference Result 263 states and 297 transitions. [2023-11-22 22:47:58,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-22 22:47:58,474 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 11 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 99 [2023-11-22 22:47:58,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:47:58,477 INFO L225 Difference]: With dead ends: 263 [2023-11-22 22:47:58,477 INFO L226 Difference]: Without dead ends: 253 [2023-11-22 22:47:58,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=236, Invalid=1924, Unknown=2, NotChecked=0, Total=2162 [2023-11-22 22:47:58,479 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 43 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-22 22:47:58,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 174 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 833 Invalid, 6 Unknown, 0 Unchecked, 1.5s Time] [2023-11-22 22:47:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-22 22:47:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2023-11-22 22:47:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 165 states have (on average 1.0666666666666667) internal successors, (176), 169 states have internal predecessors, (176), 45 states have call successors, (45), 35 states have call predecessors, (45), 42 states have return successors, (66), 48 states have call predecessors, (66), 43 states have call successors, (66) [2023-11-22 22:47:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 287 transitions. [2023-11-22 22:47:58,541 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 287 transitions. Word has length 99 [2023-11-22 22:47:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:47:58,541 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 287 transitions. [2023-11-22 22:47:58,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 11 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-22 22:47:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 287 transitions. [2023-11-22 22:47:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-22 22:47:58,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:47:58,543 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:47:58,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-22 22:47:58,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:47:58,760 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:47:58,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:47:58,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1607753727, now seen corresponding path program 3 times [2023-11-22 22:47:58,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:47:58,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717098054] [2023-11-22 22:47:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:47:58,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:47:58,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:47:58,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633271021] [2023-11-22 22:47:58,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:47:58,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:47:58,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:47:58,780 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:47:58,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-22 22:47:59,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-22 22:47:59,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:47:59,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-22 22:47:59,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:47:59,302 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 [2023-11-22 22:47:59,586 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 [2023-11-22 22:47:59,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 22:47:59,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 22:47:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 126 proven. 124 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-22 22:47:59,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:48:00,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:48:00,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717098054] [2023-11-22 22:48:00,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:48:00,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633271021] [2023-11-22 22:48:00,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633271021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:48:00,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:48:00,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-22 22:48:00,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088977052] [2023-11-22 22:48:00,465 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 22:48:00,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 22:48:00,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:48:00,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 22:48:00,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2023-11-22 22:48:00,467 INFO L87 Difference]: Start difference. First operand 253 states and 287 transitions. Second operand has 17 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-22 22:48:02,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:48:04,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:48:06,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:48:09,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:48:11,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:48:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:48:11,591 INFO L93 Difference]: Finished difference Result 255 states and 288 transitions. [2023-11-22 22:48:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-22 22:48:11,592 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 109 [2023-11-22 22:48:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:48:11,593 INFO L225 Difference]: With dead ends: 255 [2023-11-22 22:48:11,593 INFO L226 Difference]: Without dead ends: 253 [2023-11-22 22:48:11,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 113 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2023-11-22 22:48:11,594 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 60 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2023-11-22 22:48:11,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 80 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 503 Invalid, 5 Unknown, 0 Unchecked, 10.6s Time] [2023-11-22 22:48:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-22 22:48:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2023-11-22 22:48:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 165 states have (on average 1.0545454545454545) internal successors, (174), 169 states have internal predecessors, (174), 45 states have call successors, (45), 35 states have call predecessors, (45), 42 states have return successors, (66), 48 states have call predecessors, (66), 43 states have call successors, (66) [2023-11-22 22:48:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 285 transitions. [2023-11-22 22:48:11,648 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 285 transitions. Word has length 109 [2023-11-22 22:48:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:48:11,648 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 285 transitions. [2023-11-22 22:48:11,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-22 22:48:11,649 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 285 transitions. [2023-11-22 22:48:11,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-22 22:48:11,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:48:11,650 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:48:11,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-22 22:48:11,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:48:11,859 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:48:11,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:48:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash -625015788, now seen corresponding path program 4 times [2023-11-22 22:48:11,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:48:11,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299233404] [2023-11-22 22:48:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:48:11,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:48:11,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:48:11,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881738694] [2023-11-22 22:48:11,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:48:11,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:48:11,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:48:11,877 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:48:11,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-22 22:48:12,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:48:12,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:48:12,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 202 conjunts are in the unsatisfiable core [2023-11-22 22:48:12,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:48:12,199 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 11 [2023-11-22 22:48:12,204 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 [2023-11-22 22:48:14,494 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_23| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_23| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_29| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_29| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_29|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_29|) (* (select (select |c_#memory_int#6| |v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_13|) |v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_8|) (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_23|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_23|)))) is different from true [2023-11-22 22:48:16,634 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_24| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_24| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_9| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_30|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_30|) (* (select (select |c_#memory_int#6| |v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_14|) |v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_9|) (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_24|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_24|)))) is different from true [2023-11-22 22:48:23,454 WARN L876 $PredicateComparison]: unable to prove that (exists ((|func_to_recursive_line_41_to_52_0_#t~mem4| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_34| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_34| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_28| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_34|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_34|) (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_28|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_28|) |func_to_recursive_line_41_to_52_0_#t~mem4|))) is different from true [2023-11-22 22:48:27,731 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_35| Int) (|func_to_recursive_line_41_to_52_0_#t~mem4| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_29| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_35| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_29| Int)) (= (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_29|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_29|) |func_to_recursive_line_41_to_52_0_#t~mem4|) (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_35|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_35|))) (exists ((|v_func_to_recursive_line_41_to_52_0_#t~mem4_98| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_34| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_34| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_28| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_34|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_34|) (* |v_func_to_recursive_line_41_to_52_0_#t~mem4_98| (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_28|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_28|))))) is different from true [2023-11-22 22:48:34,369 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_36| Int) (|func_to_recursive_line_41_to_52_0_#t~mem4| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_36| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_30| Int)) (= (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_30|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_30|) |func_to_recursive_line_41_to_52_0_#t~mem4|) (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_36|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_36|))) (exists ((|v_func_to_recursive_line_41_to_52_0_#t~mem4_99| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_34| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_34| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_28| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_34|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_34|) (* |v_func_to_recursive_line_41_to_52_0_#t~mem4_99| (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_28|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_28|))))) is different from true [2023-11-22 22:48:46,978 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 [2023-11-22 22:48:46,984 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 29 treesize of output 17 [2023-11-22 22:48:47,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-22 22:48:47,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-22 22:48:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 107 proven. 61 refuted. 14 times theorem prover too weak. 40 trivial. 155 not checked. [2023-11-22 22:48:49,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:48:56,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:48:56,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299233404] [2023-11-22 22:48:56,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:48:56,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881738694] [2023-11-22 22:48:56,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881738694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:48:56,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:48:56,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-11-22 22:48:56,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488344717] [2023-11-22 22:48:56,465 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 22:48:56,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-22 22:48:56,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:48:56,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-22 22:48:56,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=709, Unknown=8, NotChecked=290, Total=1122 [2023-11-22 22:48:56,466 INFO L87 Difference]: Start difference. First operand 253 states and 285 transitions. Second operand has 29 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 26 states have internal predecessors, (59), 13 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16) [2023-11-22 22:48:58,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-22 22:49:12,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:49:12,537 INFO L93 Difference]: Finished difference Result 276 states and 322 transitions. [2023-11-22 22:49:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-22 22:49:12,538 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 26 states have internal predecessors, (59), 13 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16) Word has length 111 [2023-11-22 22:49:12,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:49:12,539 INFO L225 Difference]: With dead ends: 276 [2023-11-22 22:49:12,539 INFO L226 Difference]: Without dead ends: 274 [2023-11-22 22:49:12,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 82 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 53.3s TimeCoverageRelationStatistics Valid=239, Invalid=1407, Unknown=14, NotChecked=410, Total=2070 [2023-11-22 22:49:12,541 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 68 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:49:12,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 224 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 728 Invalid, 1 Unknown, 435 Unchecked, 3.2s Time] [2023-11-22 22:49:12,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-11-22 22:49:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 272. [2023-11-22 22:49:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 177 states have (on average 1.0564971751412429) internal successors, (187), 181 states have internal predecessors, (187), 48 states have call successors, (48), 37 states have call predecessors, (48), 46 states have return successors, (79), 53 states have call predecessors, (79), 46 states have call successors, (79) [2023-11-22 22:49:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 314 transitions. [2023-11-22 22:49:12,590 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 314 transitions. Word has length 111 [2023-11-22 22:49:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:49:12,590 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 314 transitions. [2023-11-22 22:49:12,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 26 states have internal predecessors, (59), 13 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16) [2023-11-22 22:49:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 314 transitions. [2023-11-22 22:49:12,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-22 22:49:12,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:49:12,592 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:49:12,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-22 22:49:12,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:49:12,810 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:49:12,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:49:12,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1397258235, now seen corresponding path program 5 times [2023-11-22 22:49:12,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:49:12,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871009952] [2023-11-22 22:49:12,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:49:12,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:49:12,843 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 22:49:12,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388689237] [2023-11-22 22:49:12,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:49:12,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:49:12,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:49:12,844 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:49:12,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-22 22:49:13,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-22 22:49:13,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:49:13,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 271 conjunts are in the unsatisfiable core [2023-11-22 22:49:13,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:49:13,446 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 [2023-11-22 22:49:13,472 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 [2023-11-22 22:49:13,659 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 [2023-11-22 22:49:13,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 22:49:34,885 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 [2023-11-22 22:49:34,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 22:49:34,896 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 28 [2023-11-22 22:49:35,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2023-11-22 22:49:35,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-22 22:49:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 68 proven. 236 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2023-11-22 22:49:35,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:49:46,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 22:49:52,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2023-11-22 22:49:52,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-11-22 22:49:52,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-22 22:49:57,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:49:57,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871009952] [2023-11-22 22:49:57,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 22:49:57,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388689237] [2023-11-22 22:49:57,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388689237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:49:57,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:49:57,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-11-22 22:49:57,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596512843] [2023-11-22 22:49:57,263 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 22:49:57,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-22 22:49:57,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:49:57,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-22 22:49:57,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1278, Unknown=15, NotChecked=0, Total=1406 [2023-11-22 22:49:57,264 INFO L87 Difference]: Start difference. First operand 272 states and 314 transitions. Second operand has 29 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 11 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2023-11-22 22:49:59,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:50:01,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:50:04,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:50:08,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 22:50:11,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] Killed by 15