./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/loops-crafted-1/discover_list.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/loops-crafted-1/discover_list.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 b98ece0168fde0a9f5db629b0589397995dd8e9526df8a73dd8042a19f16d948 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 18:17:35,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 18:17:35,901 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 18:17:35,907 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 18:17:35,908 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 18:17:35,932 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 18:17:35,934 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 18:17:35,934 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 18:17:35,935 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 18:17:35,938 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 18:17:35,938 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 18:17:35,938 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 18:17:35,939 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 18:17:35,940 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 18:17:35,940 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 18:17:35,940 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 18:17:35,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 18:17:35,941 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 18:17:35,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 18:17:35,941 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 18:17:35,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 18:17:35,943 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 18:17:35,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 18:17:35,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 18:17:35,943 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 18:17:35,943 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 18:17:35,944 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 18:17:35,944 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 18:17:35,944 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 18:17:35,944 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 18:17:35,945 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 18:17:35,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:17:35,946 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 18:17:35,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 18:17:35,946 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 18:17:35,946 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 18:17:35,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 18:17:35,946 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 18:17:35,947 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 18:17:35,947 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 18:17:35,947 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 18:17:35,947 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 18:17:35,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b98ece0168fde0a9f5db629b0589397995dd8e9526df8a73dd8042a19f16d948 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 18:17:36,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 18:17:36,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 18:17:36,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 18:17:36,184 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 18:17:36,186 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 18:17:36,187 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/discover_list.c [2023-11-22 18:17:37,331 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 18:17:37,546 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 18:17:37,547 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c [2023-11-22 18:17:37,555 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1f5c0d11/24642d40d7bd477f968b59821ab8d701/FLAGe1bd949b4 [2023-11-22 18:17:37,569 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1f5c0d11/24642d40d7bd477f968b59821ab8d701 [2023-11-22 18:17:37,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 18:17:37,572 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 18:17:37,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 18:17:37,573 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 18:17:37,577 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 18:17:37,580 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:37,581 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e587556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37, skipping insertion in model container [2023-11-22 18:17:37,581 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:37,614 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 18:17:37,742 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c[4997,5010] [2023-11-22 18:17:37,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:17:37,817 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 18:17:37,835 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c[4997,5010] [2023-11-22 18:17:37,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:17:37,920 WARN L675 CHandler]: The function smp_send_req is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 18:17:37,920 WARN L675 CHandler]: The function toupper is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 18:17:37,920 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 18:17:37,926 INFO L206 MainTranslator]: Completed translation [2023-11-22 18:17:37,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37 WrapperNode [2023-11-22 18:17:37,931 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 18:17:37,932 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 18:17:37,932 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 18:17:37,932 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 18:17:37,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:37,968 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:38,011 INFO L138 Inliner]: procedures = 36, calls = 642, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 508 [2023-11-22 18:17:38,012 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 18:17:38,013 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 18:17:38,013 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 18:17:38,013 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 18:17:38,027 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:38,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:38,031 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:38,045 INFO L189 HeapSplitter]: Split 191 memory accesses to 11 slices as follows [2, 5, 10, 4, 0, 5, 8, 5, 12, 41, 99] [2023-11-22 18:17:38,045 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:38,045 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:38,058 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:38,062 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:38,065 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:38,067 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:38,072 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 18:17:38,073 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 18:17:38,073 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 18:17:38,073 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 18:17:38,074 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37" (1/1) ... [2023-11-22 18:17:38,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:17:38,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:17:38,127 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 18:17:38,176 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 18:17:38,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 18:17:38,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 18:17:38,213 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-22 18:17:38,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 18:17:38,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 18:17:38,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 18:17:38,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-22 18:17:38,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-22 18:17:38,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-22 18:17:38,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-22 18:17:38,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-22 18:17:38,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2023-11-22 18:17:38,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2023-11-22 18:17:38,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2023-11-22 18:17:38,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 18:17:38,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 18:17:38,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 18:17:38,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-22 18:17:38,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-22 18:17:38,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-22 18:17:38,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-22 18:17:38,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-22 18:17:38,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2023-11-22 18:17:38,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2023-11-22 18:17:38,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2023-11-22 18:17:38,216 INFO L130 BoogieDeclarations]: Found specification of procedure smp_send_req [2023-11-22 18:17:38,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-22 18:17:38,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-22 18:17:38,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-22 18:17:38,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-22 18:17:38,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#4 [2023-11-22 18:17:38,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#5 [2023-11-22 18:17:38,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#6 [2023-11-22 18:17:38,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#7 [2023-11-22 18:17:38,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#8 [2023-11-22 18:17:38,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#9 [2023-11-22 18:17:38,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#10 [2023-11-22 18:17:38,218 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-22 18:17:38,218 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-22 18:17:38,218 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-22 18:17:38,218 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-22 18:17:38,218 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#4 [2023-11-22 18:17:38,218 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#5 [2023-11-22 18:17:38,218 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#6 [2023-11-22 18:17:38,219 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#7 [2023-11-22 18:17:38,219 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#8 [2023-11-22 18:17:38,219 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#9 [2023-11-22 18:17:38,219 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#10 [2023-11-22 18:17:38,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 18:17:38,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 18:17:38,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 18:17:38,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-22 18:17:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-22 18:17:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-22 18:17:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-22 18:17:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-22 18:17:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-22 18:17:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-22 18:17:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-22 18:17:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 18:17:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 18:17:38,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 18:17:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-22 18:17:38,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-22 18:17:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 18:17:38,415 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 18:17:38,432 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 18:17:38,829 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 18:17:38,881 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 18:17:38,881 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-22 18:17:38,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:17:38 BoogieIcfgContainer [2023-11-22 18:17:38,882 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 18:17:38,883 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 18:17:38,883 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 18:17:38,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 18:17:38,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:17:37" (1/3) ... [2023-11-22 18:17:38,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243109f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:17:38, skipping insertion in model container [2023-11-22 18:17:38,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:17:37" (2/3) ... [2023-11-22 18:17:38,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243109f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:17:38, skipping insertion in model container [2023-11-22 18:17:38,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:17:38" (3/3) ... [2023-11-22 18:17:38,888 INFO L112 eAbstractionObserver]: Analyzing ICFG discover_list.c [2023-11-22 18:17:38,900 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 18:17:38,901 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 18:17:38,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 18:17:38,943 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;@311452d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 18:17:38,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 18:17:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 61 states have (on average 1.5901639344262295) internal successors, (97), 62 states have internal predecessors, (97), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 18:17:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-22 18:17:38,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:17:38,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:17:38,955 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:17:38,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:17:38,959 INFO L85 PathProgramCache]: Analyzing trace with hash -627960801, now seen corresponding path program 1 times [2023-11-22 18:17:38,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:17:38,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793658764] [2023-11-22 18:17:38,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:38,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:17:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:39,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 18:17:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:39,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-22 18:17:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:39,555 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 18:17:39,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:17:39,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793658764] [2023-11-22 18:17:39,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793658764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:17:39,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:17:39,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 18:17:39,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884747195] [2023-11-22 18:17:39,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:17:39,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 18:17:39,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:17:39,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 18:17:39,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-22 18:17:39,590 INFO L87 Difference]: Start difference. First operand has 74 states, 61 states have (on average 1.5901639344262295) internal successors, (97), 62 states have internal predecessors, (97), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 18:17:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:17:39,789 INFO L93 Difference]: Finished difference Result 144 states and 225 transitions. [2023-11-22 18:17:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:17:39,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-11-22 18:17:39,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:17:39,798 INFO L225 Difference]: With dead ends: 144 [2023-11-22 18:17:39,799 INFO L226 Difference]: Without dead ends: 66 [2023-11-22 18:17:39,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-22 18:17:39,804 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 25 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:17:39,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 417 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:17:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-22 18:17:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2023-11-22 18:17:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 states have internal predecessors, (70), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 18:17:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2023-11-22 18:17:39,845 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 33 [2023-11-22 18:17:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:17:39,846 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2023-11-22 18:17:39,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 18:17:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2023-11-22 18:17:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-22 18:17:39,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:17:39,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:17:39,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 18:17:39,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:17:39,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:17:39,851 INFO L85 PathProgramCache]: Analyzing trace with hash -887648482, now seen corresponding path program 1 times [2023-11-22 18:17:39,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:17:39,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520556132] [2023-11-22 18:17:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:39,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:17:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:40,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 18:17:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:40,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 18:17:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:17:40,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:17:40,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520556132] [2023-11-22 18:17:40,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520556132] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:17:40,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056681782] [2023-11-22 18:17:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:40,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:40,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:17:40,190 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 18:17:40,220 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 18:17:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:40,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 18:17:40,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:17:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:17:40,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:17:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:17:40,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056681782] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 18:17:40,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 18:17:40,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 11 [2023-11-22 18:17:40,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388483374] [2023-11-22 18:17:40,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:17:40,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 18:17:40,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:17:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 18:17:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-22 18:17:40,572 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:17:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:17:40,613 INFO L93 Difference]: Finished difference Result 96 states and 129 transitions. [2023-11-22 18:17:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 18:17:40,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2023-11-22 18:17:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:17:40,617 INFO L225 Difference]: With dead ends: 96 [2023-11-22 18:17:40,617 INFO L226 Difference]: Without dead ends: 65 [2023-11-22 18:17:40,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-22 18:17:40,619 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:17:40,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 158 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:17:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-22 18:17:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-22 18:17:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 18:17:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2023-11-22 18:17:40,633 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 34 [2023-11-22 18:17:40,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:17:40,633 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2023-11-22 18:17:40,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:17:40,634 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2023-11-22 18:17:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-22 18:17:40,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:17:40,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:17:40,650 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 18:17:40,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:40,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:17:40,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:17:40,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1389586921, now seen corresponding path program 1 times [2023-11-22 18:17:40,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:17:40,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174173138] [2023-11-22 18:17:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:40,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:17:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:40,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 18:17:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:41,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 18:17:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:17:41,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:17:41,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174173138] [2023-11-22 18:17:41,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174173138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:17:41,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607568519] [2023-11-22 18:17:41,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:41,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:41,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:17:41,048 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 18:17:41,074 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 18:17:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:41,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 18:17:41,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:17:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:17:41,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:17:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:17:41,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607568519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:17:41,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:17:41,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 13 [2023-11-22 18:17:41,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045263168] [2023-11-22 18:17:41,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:17:41,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 18:17:41,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:17:41,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 18:17:41,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-22 18:17:41,306 INFO L87 Difference]: Start difference. First operand 65 states and 87 transitions. Second operand has 13 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 18:17:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:17:41,591 INFO L93 Difference]: Finished difference Result 122 states and 167 transitions. [2023-11-22 18:17:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 18:17:41,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2023-11-22 18:17:41,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:17:41,592 INFO L225 Difference]: With dead ends: 122 [2023-11-22 18:17:41,592 INFO L226 Difference]: Without dead ends: 69 [2023-11-22 18:17:41,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-11-22 18:17:41,593 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 30 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:17:41,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 549 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:17:41,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-22 18:17:41,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-22 18:17:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 states have internal predecessors, (75), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 18:17:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2023-11-22 18:17:41,598 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 35 [2023-11-22 18:17:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:17:41,598 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2023-11-22 18:17:41,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 18:17:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2023-11-22 18:17:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-22 18:17:41,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:17:41,599 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:17:41,613 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 18:17:41,811 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,SelfDestructingSolverStorable2 [2023-11-22 18:17:41,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:17:41,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:17:41,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1466396225, now seen corresponding path program 2 times [2023-11-22 18:17:41,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:17:41,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138546454] [2023-11-22 18:17:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:41,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:17:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:41,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 18:17:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:41,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 18:17:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 18:17:42,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:17:42,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138546454] [2023-11-22 18:17:42,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138546454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:17:42,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058541744] [2023-11-22 18:17:42,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:17:42,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:42,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:17:42,001 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 18:17:42,025 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 18:17:42,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:17:42,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:17:42,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-22 18:17:42,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:17:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 18:17:42,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:17:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 18:17:42,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058541744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:17:42,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:17:42,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2023-11-22 18:17:42,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777959347] [2023-11-22 18:17:42,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:17:42,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 18:17:42,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:17:42,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 18:17:42,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-22 18:17:42,385 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 18:17:42,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:17:42,634 INFO L93 Difference]: Finished difference Result 128 states and 171 transitions. [2023-11-22 18:17:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-22 18:17:42,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-11-22 18:17:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:17:42,635 INFO L225 Difference]: With dead ends: 128 [2023-11-22 18:17:42,635 INFO L226 Difference]: Without dead ends: 73 [2023-11-22 18:17:42,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2023-11-22 18:17:42,638 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 31 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:17:42,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 491 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:17:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-22 18:17:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-22 18:17:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 61 states have internal predecessors, (79), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 18:17:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2023-11-22 18:17:42,643 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 39 [2023-11-22 18:17:42,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:17:42,644 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2023-11-22 18:17:42,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 18:17:42,644 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2023-11-22 18:17:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-22 18:17:42,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:17:42,645 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:17:42,671 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 18:17:42,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:42,859 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:17:42,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:17:42,860 INFO L85 PathProgramCache]: Analyzing trace with hash 104466815, now seen corresponding path program 3 times [2023-11-22 18:17:42,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:17:42,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587514977] [2023-11-22 18:17:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:42,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:17:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:43,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 18:17:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:43,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 18:17:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 18:17:43,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:17:43,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587514977] [2023-11-22 18:17:43,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587514977] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:17:43,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470935910] [2023-11-22 18:17:43,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:17:43,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:43,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:17:43,255 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 18:17:43,292 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 18:17:43,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 18:17:43,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:17:43,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-22 18:17:43,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:17:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 18:17:43,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:17:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 18:17:43,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470935910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:17:43,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:17:43,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 24 [2023-11-22 18:17:43,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364505776] [2023-11-22 18:17:43,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:17:43,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-22 18:17:43,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:17:43,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-22 18:17:43,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-11-22 18:17:43,936 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand has 24 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 18:17:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:17:44,659 INFO L93 Difference]: Finished difference Result 136 states and 184 transitions. [2023-11-22 18:17:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-22 18:17:44,659 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2023-11-22 18:17:44,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:17:44,660 INFO L225 Difference]: With dead ends: 136 [2023-11-22 18:17:44,660 INFO L226 Difference]: Without dead ends: 80 [2023-11-22 18:17:44,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=293, Invalid=1777, Unknown=0, NotChecked=0, Total=2070 [2023-11-22 18:17:44,662 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 44 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:17:44,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1114 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:17:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-22 18:17:44,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-22 18:17:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 68 states have internal predecessors, (86), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 18:17:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2023-11-22 18:17:44,669 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 43 [2023-11-22 18:17:44,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:17:44,669 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2023-11-22 18:17:44,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 18:17:44,669 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2023-11-22 18:17:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-22 18:17:44,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:17:44,670 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:17:44,685 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 18:17:44,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:44,883 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:17:44,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:17:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1759813858, now seen corresponding path program 4 times [2023-11-22 18:17:44,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:17:44,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893496905] [2023-11-22 18:17:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:44,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:17:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:45,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 18:17:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:45,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-22 18:17:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-22 18:17:45,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:17:45,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893496905] [2023-11-22 18:17:45,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893496905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:17:45,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559729014] [2023-11-22 18:17:45,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:17:45,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:45,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:17:45,293 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 18:17:45,308 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 18:17:45,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:17:45,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:17:45,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-22 18:17:45,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:17:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-22 18:17:45,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:17:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-22 18:17:45,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559729014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:17:45,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:17:45,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2023-11-22 18:17:45,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897187564] [2023-11-22 18:17:45,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:17:45,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-22 18:17:45,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:17:45,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-22 18:17:45,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2023-11-22 18:17:45,928 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 30 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 18:17:47,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:17:47,082 INFO L93 Difference]: Finished difference Result 150 states and 198 transitions. [2023-11-22 18:17:47,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 18:17:47,083 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2023-11-22 18:17:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:17:47,083 INFO L225 Difference]: With dead ends: 150 [2023-11-22 18:17:47,083 INFO L226 Difference]: Without dead ends: 89 [2023-11-22 18:17:47,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=551, Invalid=1899, Unknown=0, NotChecked=0, Total=2450 [2023-11-22 18:17:47,085 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 46 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:17:47,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 742 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:17:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-22 18:17:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-22 18:17:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 77 states have internal predecessors, (95), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 18:17:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2023-11-22 18:17:47,092 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 50 [2023-11-22 18:17:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:17:47,093 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2023-11-22 18:17:47,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 18:17:47,093 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2023-11-22 18:17:47,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-22 18:17:47,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:17:47,095 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:17:47,128 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 18:17:47,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:47,296 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:17:47,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:17:47,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1544605313, now seen corresponding path program 5 times [2023-11-22 18:17:47,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:17:47,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065329358] [2023-11-22 18:17:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:47,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:17:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:47,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 18:17:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:47,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-22 18:17:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-22 18:17:48,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:17:48,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065329358] [2023-11-22 18:17:48,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065329358] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:17:48,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842332138] [2023-11-22 18:17:48,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:17:48,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:48,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:17:48,017 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 18:17:48,043 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 18:17:50,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-22 18:17:50,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:17:50,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-22 18:17:50,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:17:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 18:17:50,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:17:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-22 18:17:51,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842332138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:17:51,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:17:51,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 14] total 57 [2023-11-22 18:17:51,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6910373] [2023-11-22 18:17:51,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:17:51,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-22 18:17:51,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:17:51,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-22 18:17:51,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2912, Unknown=0, NotChecked=0, Total=3192 [2023-11-22 18:17:51,567 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand has 57 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 55 states have internal predecessors, (98), 2 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 18:17:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:17:55,417 INFO L93 Difference]: Finished difference Result 164 states and 218 transitions. [2023-11-22 18:17:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-22 18:17:55,417 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 55 states have internal predecessors, (98), 2 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 59 [2023-11-22 18:17:55,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:17:55,418 INFO L225 Difference]: With dead ends: 164 [2023-11-22 18:17:55,419 INFO L226 Difference]: Without dead ends: 102 [2023-11-22 18:17:55,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=975, Invalid=9531, Unknown=0, NotChecked=0, Total=10506 [2023-11-22 18:17:55,439 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 73 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-22 18:17:55,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1810 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-22 18:17:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-22 18:17:55,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-22 18:17:55,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.2) internal successors, (108), 90 states have internal predecessors, (108), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 18:17:55,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2023-11-22 18:17:55,453 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 59 [2023-11-22 18:17:55,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:17:55,453 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2023-11-22 18:17:55,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 55 states have internal predecessors, (98), 2 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 18:17:55,454 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2023-11-22 18:17:55,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-22 18:17:55,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:17:55,454 INFO L195 NwaCegarLoop]: trace histogram [22, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:17:55,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 18:17:55,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:55,655 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:17:55,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:17:55,656 INFO L85 PathProgramCache]: Analyzing trace with hash 485879422, now seen corresponding path program 6 times [2023-11-22 18:17:55,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:17:55,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032193670] [2023-11-22 18:17:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:55,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:17:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:56,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 18:17:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:56,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-22 18:17:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-22 18:17:56,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:17:56,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032193670] [2023-11-22 18:17:56,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032193670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:17:56,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323747339] [2023-11-22 18:17:56,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:17:56,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:56,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:17:56,573 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 18:17:56,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process Killed by 15