./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_bresenham-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_bresenham-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 d115e09498e3f278fd539730f0fa55e0745770e0304e10455a14000311085b68 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 18:33:25,096 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 18:33:25,158 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 18:33:25,161 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 18:33:25,161 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 18:33:25,179 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 18:33:25,180 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 18:33:25,180 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 18:33:25,181 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 18:33:25,181 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 18:33:25,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 18:33:25,182 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 18:33:25,183 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 18:33:25,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 18:33:25,186 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 18:33:25,186 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 18:33:25,187 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 18:33:25,187 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 18:33:25,188 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 18:33:25,188 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 18:33:25,188 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 18:33:25,188 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 18:33:25,189 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 18:33:25,189 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 18:33:25,189 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 18:33:25,189 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 18:33:25,189 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 18:33:25,190 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 18:33:25,190 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 18:33:25,190 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 18:33:25,191 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 18:33:25,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:33:25,191 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 18:33:25,192 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 18:33:25,192 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 18:33:25,192 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 18:33:25,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 18:33:25,192 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 18:33:25,193 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 18:33:25,193 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 18:33:25,193 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 18:33:25,193 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 18:33:25,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d115e09498e3f278fd539730f0fa55e0745770e0304e10455a14000311085b68 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 18:33:25,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 18:33:25,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 18:33:25,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 18:33:25,462 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 18:33:25,462 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 18:33:25,463 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_bresenham-ll.c [2023-11-22 18:33:26,406 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 18:33:26,555 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 18:33:26,555 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_bresenham-ll.c [2023-11-22 18:33:26,560 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ae6b5a20/7a9916b0f1464e5ab21b03143db84d0c/FLAG7a5a869c5 [2023-11-22 18:33:26,569 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ae6b5a20/7a9916b0f1464e5ab21b03143db84d0c [2023-11-22 18:33:26,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 18:33:26,572 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 18:33:26,572 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 18:33:26,573 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 18:33:26,576 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 18:33:26,576 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,577 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ffea8b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26, skipping insertion in model container [2023-11-22 18:33:26,577 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,593 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 18:33:26,691 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_bresenham-ll.c[1137,1150] [2023-11-22 18:33:26,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:33:26,718 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 18:33:26,726 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_bresenham-ll.c[1137,1150] [2023-11-22 18:33:26,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:33:26,745 INFO L206 MainTranslator]: Completed translation [2023-11-22 18:33:26,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26 WrapperNode [2023-11-22 18:33:26,747 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 18:33:26,748 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 18:33:26,748 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 18:33:26,749 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 18:33:26,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,769 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,784 INFO L138 Inliner]: procedures = 16, calls = 76, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 85 [2023-11-22 18:33:26,784 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 18:33:26,785 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 18:33:26,785 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 18:33:26,785 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 18:33:26,792 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,793 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,794 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,803 INFO L189 HeapSplitter]: Split 46 memory accesses to 8 slices as follows [2, 8, 6, 7, 7, 4, 8, 4] [2023-11-22 18:33:26,804 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,804 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,809 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,810 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,811 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,812 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,832 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 18:33:26,833 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 18:33:26,833 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 18:33:26,833 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 18:33:26,834 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26" (1/1) ... [2023-11-22 18:33:26,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:33:26,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:33:26,867 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 18:33:26,869 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 18:33:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 18:33:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 18:33:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 18:33:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 18:33:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-22 18:33:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-22 18:33:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-22 18:33:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-22 18:33:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-22 18:33:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 18:33:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 18:33:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 18:33:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 18:33:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-22 18:33:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-22 18:33:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-22 18:33:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-22 18:33:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-22 18:33:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 18:33:26,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 18:33:26,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 18:33:26,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 18:33:26,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 18:33:26,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-22 18:33:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-22 18:33:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-22 18:33:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-22 18:33:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-22 18:33:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_41_0 [2023-11-22 18:33:26,912 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_41_0 [2023-11-22 18:33:26,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-22 18:33:26,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-22 18:33:26,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 18:33:26,987 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 18:33:26,989 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 18:33:27,230 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 18:33:27,260 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 18:33:27,261 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-22 18:33:27,261 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:33:27 BoogieIcfgContainer [2023-11-22 18:33:27,261 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 18:33:27,263 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 18:33:27,263 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 18:33:27,265 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 18:33:27,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:33:26" (1/3) ... [2023-11-22 18:33:27,269 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a54886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:33:27, skipping insertion in model container [2023-11-22 18:33:27,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:33:26" (2/3) ... [2023-11-22 18:33:27,270 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a54886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:33:27, skipping insertion in model container [2023-11-22 18:33:27,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:33:27" (3/3) ... [2023-11-22 18:33:27,271 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_bresenham-ll.c [2023-11-22 18:33:27,285 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 18:33:27,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 18:33:27,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 18:33:27,333 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;@1df0e8e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 18:33:27,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 18:33:27,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 18:33:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-22 18:33:27,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:33:27,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:33:27,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:33:27,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:33:27,347 INFO L85 PathProgramCache]: Analyzing trace with hash -56389801, now seen corresponding path program 1 times [2023-11-22 18:33:27,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:33:27,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257527982] [2023-11-22 18:33:27,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:33:27,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:33:27,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 18:33:27,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369585817] [2023-11-22 18:33:27,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:33:27,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:33:27,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:33:27,505 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 18:33:27,518 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 18:33:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:33:27,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-22 18:33:27,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:33:27,708 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 18:33:27,710 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 18:33:27,712 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 18:33:27,717 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 18:33:27,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-22 18:33:27,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-11-22 18:33:27,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-22 18:33:27,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-22 18:33:27,950 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 18:33:27,950 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 18:33:27,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:33:27,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257527982] [2023-11-22 18:33:27,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 18:33:27,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369585817] [2023-11-22 18:33:27,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369585817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:33:27,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:33:27,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 18:33:27,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574456818] [2023-11-22 18:33:27,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:33:27,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 18:33:27,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:33:27,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 18:33:27,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-22 18:33:27,985 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:33:28,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:33:28,242 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2023-11-22 18:33:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 18:33:28,245 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-22 18:33:28,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:33:28,250 INFO L225 Difference]: With dead ends: 57 [2023-11-22 18:33:28,250 INFO L226 Difference]: Without dead ends: 34 [2023-11-22 18:33:28,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-22 18:33:28,260 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:33:28,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 70 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:33:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-22 18:33:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2023-11-22 18:33:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-22 18:33:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-22 18:33:28,288 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 8 [2023-11-22 18:33:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:33:28,289 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-22 18:33:28,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:33:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-22 18:33:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-22 18:33:28,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:33:28,291 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:33:28,307 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 18:33:28,507 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 18:33:28,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:33:28,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:33:28,508 INFO L85 PathProgramCache]: Analyzing trace with hash 11856504, now seen corresponding path program 1 times [2023-11-22 18:33:28,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:33:28,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636521768] [2023-11-22 18:33:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:33:28,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:33:28,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 18:33:28,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206281327] [2023-11-22 18:33:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:33:28,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:33:28,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:33:28,543 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 18:33:28,545 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 18:33:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:33:28,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-22 18:33:28,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:33:28,670 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 18:33:28,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-22 18:33:28,678 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 18:33:28,685 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 18:33:28,689 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 18:33:28,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 18:33:28,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-22 18:33:28,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 18:33:28,877 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 18:33:28,878 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 18:33:28,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:33:28,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636521768] [2023-11-22 18:33:28,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 18:33:28,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206281327] [2023-11-22 18:33:28,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206281327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:33:28,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:33:28,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 18:33:28,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270168650] [2023-11-22 18:33:28,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:33:28,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 18:33:28,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:33:28,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 18:33:28,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-22 18:33:28,891 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 18:33:29,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:33:29,022 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2023-11-22 18:33:29,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:33:29,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-22 18:33:29,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:33:29,024 INFO L225 Difference]: With dead ends: 41 [2023-11-22 18:33:29,025 INFO L226 Difference]: Without dead ends: 31 [2023-11-22 18:33:29,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 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 18:33:29,029 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:33:29,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 39 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:33:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-22 18:33:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-22 18:33:29,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-22 18:33:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-11-22 18:33:29,039 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2023-11-22 18:33:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:33:29,040 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-11-22 18:33:29,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 18:33:29,040 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-11-22 18:33:29,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 18:33:29,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:33:29,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:33:29,055 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 18:33:29,248 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 18:33:29,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:33:29,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:33:29,249 INFO L85 PathProgramCache]: Analyzing trace with hash 12842250, now seen corresponding path program 1 times [2023-11-22 18:33:29,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:33:29,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620986313] [2023-11-22 18:33:29,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:33:29,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:33:29,287 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 18:33:29,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474057782] [2023-11-22 18:33:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:33:29,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:33:29,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:33:29,292 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 18:33:29,323 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 18:33:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:33:29,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 158 conjunts are in the unsatisfiable core [2023-11-22 18:33:29,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:33:29,439 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 18:33:29,441 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 18:33:29,445 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 18:33:29,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-22 18:33:29,456 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 18:33:29,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2023-11-22 18:33:32,375 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 18:33:32,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 18:33:32,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 18:33:32,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-11-22 18:33:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:33:32,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:33:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:33:33,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:33:33,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620986313] [2023-11-22 18:33:33,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 18:33:33,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474057782] [2023-11-22 18:33:33,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474057782] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:33:33,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 18:33:33,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-22 18:33:33,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966977620] [2023-11-22 18:33:33,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 18:33:33,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 18:33:33,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:33:33,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 18:33:33,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=520, Unknown=1, NotChecked=0, Total=600 [2023-11-22 18:33:33,098 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 25 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 18:33:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:33:33,753 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-11-22 18:33:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-22 18:33:33,754 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-22 18:33:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:33:33,754 INFO L225 Difference]: With dead ends: 52 [2023-11-22 18:33:33,755 INFO L226 Difference]: Without dead ends: 48 [2023-11-22 18:33:33,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=169, Invalid=952, Unknown=1, NotChecked=0, Total=1122 [2023-11-22 18:33:33,756 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:33:33,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 75 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:33:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-22 18:33:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2023-11-22 18:33:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-22 18:33:33,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2023-11-22 18:33:33,764 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 20 [2023-11-22 18:33:33,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:33:33,764 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2023-11-22 18:33:33,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 18:33:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2023-11-22 18:33:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-22 18:33:33,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:33:33,765 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:33:33,792 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 18:33:33,978 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 18:33:33,979 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:33:33,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:33:33,979 INFO L85 PathProgramCache]: Analyzing trace with hash 405669074, now seen corresponding path program 1 times [2023-11-22 18:33:33,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:33:33,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055534105] [2023-11-22 18:33:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:33:33,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:33:34,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 18:33:34,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489480320] [2023-11-22 18:33:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:33:34,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:33:34,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:33:34,032 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 18:33:34,040 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 18:33:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:33:34,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 127 conjunts are in the unsatisfiable core [2023-11-22 18:33:34,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:33:34,170 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 18:33:34,176 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 18:33:34,180 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 1 [2023-11-22 18:33:34,182 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 18:33:34,184 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 25 treesize of output 19 [2023-11-22 18:33:34,941 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 18:33:34,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2023-11-22 18:33:34,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-11-22 18:33:34,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2023-11-22 18:33:35,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2023-11-22 18:33:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:33:35,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:33:36,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:33:36,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055534105] [2023-11-22 18:33:36,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 18:33:36,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489480320] [2023-11-22 18:33:36,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489480320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:33:36,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 18:33:36,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-22 18:33:36,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869132718] [2023-11-22 18:33:36,616 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 18:33:36,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 18:33:36,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:33:36,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 18:33:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-11-22 18:33:36,617 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 18:33:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:33:37,230 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2023-11-22 18:33:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 18:33:37,231 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2023-11-22 18:33:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:33:37,231 INFO L225 Difference]: With dead ends: 55 [2023-11-22 18:33:37,232 INFO L226 Difference]: Without dead ends: 45 [2023-11-22 18:33:37,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2023-11-22 18:33:37,232 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:33:37,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 59 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:33:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-22 18:33:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-22 18:33:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-22 18:33:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2023-11-22 18:33:37,240 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 32 [2023-11-22 18:33:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:33:37,240 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2023-11-22 18:33:37,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 18:33:37,240 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2023-11-22 18:33:37,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-22 18:33:37,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:33:37,241 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:33:37,253 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 18:33:37,452 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 18:33:37,453 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:33:37,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:33:37,453 INFO L85 PathProgramCache]: Analyzing trace with hash 828370900, now seen corresponding path program 1 times [2023-11-22 18:33:37,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:33:37,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367131174] [2023-11-22 18:33:37,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:33:37,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:33:37,471 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 18:33:37,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018691816] [2023-11-22 18:33:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:33:37,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:33:37,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:33:37,473 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 18:33:37,477 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 18:33:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:33:37,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 153 conjunts are in the unsatisfiable core [2023-11-22 18:33:37,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:33:37,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-22 18:33:37,626 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 18:33:37,629 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 18:33:37,633 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 18:33:37,637 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 18:33:39,107 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 18:33:39,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 39 [2023-11-22 18:33:39,121 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 18:33:39,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-22 18:33:39,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 18:33:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:33:39,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:33:42,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 96 [2023-11-22 18:33:42,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 88 [2023-11-22 18:33:42,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 68 [2023-11-22 18:33:42,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 60 [2023-11-22 18:33:42,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2023-11-22 18:33:44,264 WARN L854 $PredicateComparison]: unable to prove that (and (or (< (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_0_to_41_0_#in~X.base|) |c_func_to_recursive_line_0_to_41_0_#in~X.offset|) (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_0_to_41_0_#in~x.base|) |c_func_to_recursive_line_0_to_41_0_#in~x.offset|)) (forall ((|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_7| Int)) (let ((.cse0 (select (select |c_#memory_int#2| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_3|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_3|)) (.cse1 (select (select |c_#memory_int#3| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_7|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_7|))) (= (+ (* (* .cse0 .cse1) 2) (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_7|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_7|) (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_5|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_5|)) (let ((.cse2 (select (select |c_#memory_int#1| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_5|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_5|))) (+ (* .cse2 2) (* 2 .cse0) (* 2 (* .cse2 .cse1)))))))) (forall ((|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_7| Int)) (or (let ((.cse3 (select (select |c_#memory_int#2| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_3|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_3|)) (.cse4 (select (select |c_#memory_int#3| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_7|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_7|))) (= (+ (* (* .cse3 .cse4) 2) (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_7|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_7|) (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_5|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_5|)) (let ((.cse5 (select (select |c_#memory_int#1| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_5|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_5|))) (+ (* .cse5 2) (* 2 .cse3) (* 2 (* .cse5 .cse4)))))) (not (let ((.cse6 (select (select |c_old(#memory_int#2)| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_3|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_3|)) (.cse7 (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_7|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_7|))) (= (+ (* (* .cse6 .cse7) 2) (select (select |c_old(#memory_int#4)| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_7|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_7|) (select (select |c_old(#memory_int#6)| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_5|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_5|)) (let ((.cse8 (select (select |c_old(#memory_int#1)| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_5|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_5|))) (+ (* .cse6 2) (* 2 .cse8) (* (* .cse7 .cse8) 2))))))))) is different from false [2023-11-22 18:33:46,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:33:46,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367131174] [2023-11-22 18:33:46,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 18:33:46,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018691816] [2023-11-22 18:33:46,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018691816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:33:46,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 18:33:46,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-11-22 18:33:46,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148199359] [2023-11-22 18:33:46,812 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 18:33:46,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 18:33:46,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:33:46,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 18:33:46,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=662, Unknown=2, NotChecked=52, Total=812 [2023-11-22 18:33:46,813 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 18:33:49,696 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 [] [2023-11-22 18:33:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:33:51,646 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2023-11-22 18:33:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-22 18:33:51,646 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2023-11-22 18:33:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:33:51,647 INFO L225 Difference]: With dead ends: 53 [2023-11-22 18:33:51,647 INFO L226 Difference]: Without dead ends: 47 [2023-11-22 18:33:51,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=161, Invalid=1173, Unknown=2, NotChecked=70, Total=1406 [2023-11-22 18:33:51,648 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-22 18:33:51,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 59 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 352 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-11-22 18:33:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-22 18:33:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2023-11-22 18:33:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-22 18:33:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-11-22 18:33:51,655 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 32 [2023-11-22 18:33:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:33:51,656 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-11-22 18:33:51,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 18:33:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-11-22 18:33:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-22 18:33:51,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:33:51,657 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:33:51,668 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 18:33:51,868 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 18:33:51,868 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:33:51,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:33:51,869 INFO L85 PathProgramCache]: Analyzing trace with hash 367418220, now seen corresponding path program 2 times [2023-11-22 18:33:51,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:33:51,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534483128] [2023-11-22 18:33:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:33:51,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:33:51,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 18:33:51,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966263835] [2023-11-22 18:33:51,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:33:51,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:33:51,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:33:51,913 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 18:33:51,914 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 18:33:52,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:33:52,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:33:52,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 212 conjunts are in the unsatisfiable core [2023-11-22 18:33:52,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:33:52,115 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 15 treesize of output 1 [2023-11-22 18:33:52,119 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 18:33:52,125 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 18:33:52,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-22 18:33:52,145 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 18:33:53,518 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 18:33:53,536 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 18:33:55,657 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_8| Int) (func_to_recursive_line_0_to_41_0_~xy.base Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_12| Int) (func_to_recursive_line_0_to_41_0_~xy.offset Int)) (<= (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_8|) (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_12|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_12|)) (select (select |c_#memory_int#5| func_to_recursive_line_0_to_41_0_~xy.base) func_to_recursive_line_0_to_41_0_~xy.offset))) (exists ((|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_12| Int) (func_to_recursive_line_0_to_41_0_~yx.base Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_10| Int) (func_to_recursive_line_0_to_41_0_~yx.offset Int)) (<= (select (select |c_#memory_int#7| func_to_recursive_line_0_to_41_0_~yx.base) func_to_recursive_line_0_to_41_0_~yx.offset) (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_12|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_12|) (select (select |c_#memory_int#1| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_10|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_10|))))) is different from true [2023-11-22 18:33:56,705 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 18:33:56,722 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 54 treesize of output 31 [2023-11-22 18:33:56,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2023-11-22 18:33:56,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:33:56,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 55 [2023-11-22 18:33:56,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:33:56,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 76 [2023-11-22 18:33:56,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:33:56,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 50 [2023-11-22 18:33:56,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:33:56,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2023-11-22 18:33:57,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:33:57,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2023-11-22 18:33:57,027 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:33:57,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-11-22 18:33:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 1 not checked. [2023-11-22 18:33:59,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:34:08,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:34:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534483128] [2023-11-22 18:34:08,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 18:34:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966263835] [2023-11-22 18:34:08,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966263835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:34:08,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 18:34:08,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-11-22 18:34:08,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744938043] [2023-11-22 18:34:08,469 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 18:34:08,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 18:34:08,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:34:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 18:34:08,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=538, Unknown=2, NotChecked=46, Total=650 [2023-11-22 18:34:08,470 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-22 18:34:10,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:34:10,835 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2023-11-22 18:34:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-22 18:34:10,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2023-11-22 18:34:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:34:10,837 INFO L225 Difference]: With dead ends: 55 [2023-11-22 18:34:10,837 INFO L226 Difference]: Without dead ends: 49 [2023-11-22 18:34:10,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=147, Invalid=1115, Unknown=2, NotChecked=68, Total=1332 [2023-11-22 18:34:10,838 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:34:10,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 105 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 372 Invalid, 0 Unknown, 39 Unchecked, 1.0s Time] [2023-11-22 18:34:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-22 18:34:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2023-11-22 18:34:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2023-11-22 18:34:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2023-11-22 18:34:10,846 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 46 [2023-11-22 18:34:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:34:10,847 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2023-11-22 18:34:10,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-22 18:34:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2023-11-22 18:34:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-22 18:34:10,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:34:10,848 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:34:10,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-22 18:34:11,057 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 18:34:11,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:34:11,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:34:11,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1438020114, now seen corresponding path program 1 times [2023-11-22 18:34:11,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:34:11,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646150675] [2023-11-22 18:34:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:34:11,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:34:11,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 18:34:11,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602850606] [2023-11-22 18:34:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:34:11,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:34:11,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:34:11,096 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 18:34:11,097 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 18:34:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:34:11,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 112 conjunts are in the unsatisfiable core [2023-11-22 18:34:11,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:34:11,282 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 18:34:11,284 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 18:34:11,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-22 18:34:11,298 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 18:34:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:34:12,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:34:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:34:15,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:34:15,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646150675] [2023-11-22 18:34:15,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 18:34:15,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602850606] [2023-11-22 18:34:15,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602850606] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:34:15,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 18:34:15,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2023-11-22 18:34:15,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662561038] [2023-11-22 18:34:15,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 18:34:15,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-22 18:34:15,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:34:15,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-22 18:34:15,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2023-11-22 18:34:15,518 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 36 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-22 18:34:16,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:34:16,823 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2023-11-22 18:34:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 18:34:16,824 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) Word has length 46 [2023-11-22 18:34:16,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:34:16,825 INFO L225 Difference]: With dead ends: 57 [2023-11-22 18:34:16,825 INFO L226 Difference]: Without dead ends: 51 [2023-11-22 18:34:16,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2023-11-22 18:34:16,826 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-22 18:34:16,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 88 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-22 18:34:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-22 18:34:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2023-11-22 18:34:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2023-11-22 18:34:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2023-11-22 18:34:16,835 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 46 [2023-11-22 18:34:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:34:16,836 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2023-11-22 18:34:16,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-22 18:34:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2023-11-22 18:34:16,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-22 18:34:16,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:34:16,837 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:34:16,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-22 18:34:17,040 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 18:34:17,043 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:34:17,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:34:17,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2012941680, now seen corresponding path program 2 times [2023-11-22 18:34:17,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:34:17,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601258854] [2023-11-22 18:34:17,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:34:17,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:34:17,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 18:34:17,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291774900] [2023-11-22 18:34:17,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:34:17,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:34:17,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:34:17,061 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 18:34:17,063 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 18:34:17,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:34:17,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:34:17,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 227 conjunts are in the unsatisfiable core [2023-11-22 18:34:17,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:34:17,324 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 11 treesize of output 7 [2023-11-22 18:34:17,329 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 18:34:17,332 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 18:34:17,337 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 18:34:18,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2023-11-22 18:34:18,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2023-11-22 18:34:18,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2023-11-22 18:34:20,481 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 18:34:20,506 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 18:34:20,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:34:20,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2023-11-22 18:34:20,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:34:20,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 58 [2023-11-22 18:34:20,751 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:34:20,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2023-11-22 18:34:20,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 18:34:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:34:20,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:34:44,241 WARN L293 SmtUtils]: Spent 7.73s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-22 18:34:51,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 103 [2023-11-22 18:35:03,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:35:03,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 296 [2023-11-22 18:35:58,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:35:58,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601258854] [2023-11-22 18:35:58,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 18:35:58,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291774900] [2023-11-22 18:35:58,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291774900] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:35:58,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 18:35:58,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-11-22 18:35:58,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348070892] [2023-11-22 18:35:58,334 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 18:35:58,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-22 18:35:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:35:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-22 18:35:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1048, Unknown=24, NotChecked=0, Total=1190 [2023-11-22 18:35:58,336 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-22 18:36:00,683 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 18:36:31,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:36:31,299 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2023-11-22 18:36:31,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 18:36:31,300 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2023-11-22 18:36:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:36:31,301 INFO L225 Difference]: With dead ends: 57 [2023-11-22 18:36:31,301 INFO L226 Difference]: Without dead ends: 51 [2023-11-22 18:36:31,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 80.8s TimeCoverageRelationStatistics Valid=247, Invalid=1975, Unknown=34, NotChecked=0, Total=2256 [2023-11-22 18:36:31,302 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-22 18:36:31,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 83 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 422 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2023-11-22 18:36:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-22 18:36:31,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2023-11-22 18:36:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2023-11-22 18:36:31,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-11-22 18:36:31,312 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 46 [2023-11-22 18:36:31,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:36:31,312 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-11-22 18:36:31,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-22 18:36:31,312 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-11-22 18:36:31,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-22 18:36:31,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:36:31,313 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:36:31,330 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 18:36:31,530 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 18:36:31,531 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:36:31,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:36:31,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1934721868, now seen corresponding path program 3 times [2023-11-22 18:36:31,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:36:31,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797655361] [2023-11-22 18:36:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:36:31,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:36:31,549 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 18:36:31,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924152594] [2023-11-22 18:36:31,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:36:31,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:36:31,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:36:31,550 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 18:36:31,551 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 18:36:34,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-22 18:36:34,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:36:34,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 295 conjunts are in the unsatisfiable core [2023-11-22 18:36:34,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:36:34,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-22 18:36:34,615 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 18:36:34,645 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 18:36:34,660 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 18:36:34,682 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 18:36:44,849 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 18:36:44,913 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 18:36:44,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 39 [2023-11-22 18:36:45,363 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 32 treesize of output 20 [2023-11-22 18:36:45,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-22 18:36:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-22 18:36:46,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:37:06,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 62 [2023-11-22 18:37:06,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-11-22 18:37:06,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-11-22 18:37:06,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2023-11-22 18:37:06,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-11-22 18:37:49,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:37:49,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797655361] [2023-11-22 18:37:49,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 18:37:49,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924152594] [2023-11-22 18:37:49,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924152594] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:37:49,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 18:37:49,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-11-22 18:37:49,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552226655] [2023-11-22 18:37:49,429 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 18:37:49,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 18:37:49,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:37:49,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 18:37:49,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=669, Unknown=14, NotChecked=0, Total=756 [2023-11-22 18:37:49,431 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-22 18:38:07,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:38:07,811 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2023-11-22 18:38:07,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 18:38:07,812 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2023-11-22 18:38:07,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:38:07,813 INFO L225 Difference]: With dead ends: 59 [2023-11-22 18:38:07,813 INFO L226 Difference]: Without dead ends: 53 [2023-11-22 18:38:07,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 56.5s TimeCoverageRelationStatistics Valid=123, Invalid=1119, Unknown=18, NotChecked=0, Total=1260 [2023-11-22 18:38:07,814 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-22 18:38:07,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 116 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-11-22 18:38:07,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-22 18:38:07,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-11-22 18:38:07,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) [2023-11-22 18:38:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-11-22 18:38:07,823 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 60 [2023-11-22 18:38:07,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:38:07,823 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-11-22 18:38:07,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-22 18:38:07,823 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-11-22 18:38:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-22 18:38:07,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:38:07,824 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:38:07,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 Killed by 15