./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/memory-model/2SB.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/memory-model/2SB.i -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 cec14f16ae81e958645b6575cf97932d8a09e14a8eafa007b1475b8cf31c9f62 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 14:05:21,520 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 14:05:21,578 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 14:05:21,585 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 14:05:21,585 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 14:05:21,605 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 14:05:21,607 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 14:05:21,607 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 14:05:21,607 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 14:05:21,607 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 14:05:21,608 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 14:05:21,608 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 14:05:21,608 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 14:05:21,608 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 14:05:21,608 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 14:05:21,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 14:05:21,609 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 14:05:21,609 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 14:05:21,609 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 14:05:21,609 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 14:05:21,610 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 14:05:21,610 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 14:05:21,610 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 14:05:21,610 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 14:05:21,610 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 14:05:21,610 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 14:05:21,610 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 14:05:21,610 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 14:05:21,610 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 14:05:21,610 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 14:05:21,610 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 14:05:21,610 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 14:05:21,611 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:05:21,611 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 14:05:21,611 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 14:05:21,611 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 14:05:21,611 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 14:05:21,611 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 14:05:21,612 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 14:05:21,612 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 14:05:21,612 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 14:05:21,612 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 14:05:21,612 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 14:05:21,612 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> cec14f16ae81e958645b6575cf97932d8a09e14a8eafa007b1475b8cf31c9f62 [2025-03-16 14:05:21,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 14:05:21,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 14:05:21,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 14:05:21,856 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 14:05:21,856 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 14:05:21,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memory-model/2SB.i [2025-03-16 14:05:23,052 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d9973bb0/b11fb3ab066b461daf816375d5620ac0/FLAG56f0d312b [2025-03-16 14:05:23,261 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 14:05:23,261 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memory-model/2SB.i [2025-03-16 14:05:23,271 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d9973bb0/b11fb3ab066b461daf816375d5620ac0/FLAG56f0d312b [2025-03-16 14:05:23,281 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d9973bb0/b11fb3ab066b461daf816375d5620ac0 [2025-03-16 14:05:23,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 14:05:23,284 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 14:05:23,284 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 14:05:23,285 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 14:05:23,287 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 14:05:23,288 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5421906c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23, skipping insertion in model container [2025-03-16 14:05:23,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,307 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 14:05:23,531 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memory-model/2SB.i[13547,13560] [2025-03-16 14:05:23,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:05:23,539 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 14:05:23,607 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memory-model/2SB.i[13547,13560] [2025-03-16 14:05:23,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:05:23,621 INFO L204 MainTranslator]: Completed translation [2025-03-16 14:05:23,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23 WrapperNode [2025-03-16 14:05:23,622 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 14:05:23,623 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 14:05:23,623 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 14:05:23,624 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 14:05:23,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,642 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,671 INFO L138 Inliner]: procedures = 27, calls = 414, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 913 [2025-03-16 14:05:23,672 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 14:05:23,672 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 14:05:23,672 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 14:05:23,672 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 14:05:23,678 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,684 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,718 INFO L175 MemorySlicer]: Split 310 memory accesses to 14 slices as follows [12, 10, 12, 11, 76, 13, 40, 3, 10, 10, 48, 37, 13, 15]. 25 percent of accesses are in the largest equivalence class. The 26 initializations are split as follows [10, 1, 5, 0, 0, 5, 0, 0, 0, 0, 0, 0, 5, 0]. The 117 writes are split as follows [1, 3, 2, 5, 40, 2, 20, 2, 5, 5, 10, 15, 2, 5]. [2025-03-16 14:05:23,719 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,719 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,744 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,745 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,748 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,749 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,757 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 14:05:23,758 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 14:05:23,758 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 14:05:23,758 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 14:05:23,763 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23" (1/1) ... [2025-03-16 14:05:23,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:05:23,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:23,787 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 14:05:23,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 14:05:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure tso_core_write [2025-03-16 14:05:23,805 INFO L138 BoogieDeclarations]: Found implementation of procedure tso_core_write [2025-03-16 14:05:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_headerT [2025-03-16 14:05:23,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_nondet_headerT [2025-03-16 14:05:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure stepWriteBuffer [2025-03-16 14:05:23,805 INFO L138 BoogieDeclarations]: Found implementation of procedure stepWriteBuffer [2025-03-16 14:05:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure tso_core_read [2025-03-16 14:05:23,805 INFO L138 BoogieDeclarations]: Found implementation of procedure tso_core_read [2025-03-16 14:05:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 14:05:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 14:05:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 14:05:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-16 14:05:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-16 14:05:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-03-16 14:05:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-03-16 14:05:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2025-03-16 14:05:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2025-03-16 14:05:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2025-03-16 14:05:23,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2025-03-16 14:05:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2025-03-16 14:05:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2025-03-16 14:05:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2025-03-16 14:05:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#13 [2025-03-16 14:05:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 14:05:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 14:05:23,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-16 14:05:23,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-16 14:05:23,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-03-16 14:05:23,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-03-16 14:05:23,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-03-16 14:05:23,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2025-03-16 14:05:23,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2025-03-16 14:05:23,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2025-03-16 14:05:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2025-03-16 14:05:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2025-03-16 14:05:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2025-03-16 14:05:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#13 [2025-03-16 14:05:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure store_buffering_2_conditions [2025-03-16 14:05:23,811 INFO L138 BoogieDeclarations]: Found implementation of procedure store_buffering_2_conditions [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#13 [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure initWriteBuffer [2025-03-16 14:05:23,811 INFO L138 BoogieDeclarations]: Found implementation of procedure initWriteBuffer [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure tso_core_fence [2025-03-16 14:05:23,811 INFO L138 BoogieDeclarations]: Found implementation of procedure tso_core_fence [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 14:05:23,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 14:05:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 14:05:23,978 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 14:05:23,979 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 14:05:24,329 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L59: havoc #t~mem7#1;havoc #t~mem8#1;havoc #t~mem9#1;havoc #t~mem10#1;havoc #t~mem11#1;call ULTIMATE.dealloc(~#result~0#1.base, ~#result~0#1.offset);havoc ~#result~0#1.base, ~#result~0#1.offset; [2025-03-16 14:05:24,329 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L50: havoc __VERIFIER_nondet_operations_#t~nondet1#1; [2025-03-16 14:05:24,653 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L47: havoc __VERIFIER_nondet_step_#t~nondet0#1; [2025-03-16 14:05:24,654 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L83: call ULTIMATE.dealloc(main_~#sharedMemory~0#1.base, main_~#sharedMemory~0#1.offset);havoc main_~#sharedMemory~0#1.base, main_~#sharedMemory~0#1.offset;call ULTIMATE.dealloc(main_~#wrBuffer0~0#1.base, main_~#wrBuffer0~0#1.offset);havoc main_~#wrBuffer0~0#1.base, main_~#wrBuffer0~0#1.offset;call ULTIMATE.dealloc(main_~#wrBuffer1~0#1.base, main_~#wrBuffer1~0#1.offset);havoc main_~#wrBuffer1~0#1.base, main_~#wrBuffer1~0#1.offset;call ULTIMATE.dealloc(main_~#g_history~0#1.base, main_~#g_history~0#1.offset);havoc main_~#g_history~0#1.base, main_~#g_history~0#1.offset;call ULTIMATE.dealloc(main_~#global_time~0#1.base, main_~#global_time~0#1.offset);havoc main_~#global_time~0#1.base, main_~#global_time~0#1.offset;call ULTIMATE.dealloc(main_~#litmus_input~0#1.base, main_~#litmus_input~0#1.offset);havoc main_~#litmus_input~0#1.base, main_~#litmus_input~0#1.offset;call ULTIMATE.dealloc(main_~#input_action~0#1.base, main_~#input_action~0#1.offset);havoc main_~#input_action~0#1.base, main_~#input_action~0#1.offset; [2025-03-16 14:05:24,695 INFO L? ?]: Removed 141 outVars from TransFormulas that were not future-live. [2025-03-16 14:05:24,695 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 14:05:24,705 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 14:05:24,705 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 14:05:24,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:05:24 BoogieIcfgContainer [2025-03-16 14:05:24,706 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 14:05:24,707 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 14:05:24,707 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 14:05:24,712 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 14:05:24,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 02:05:23" (1/3) ... [2025-03-16 14:05:24,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d55f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:05:24, skipping insertion in model container [2025-03-16 14:05:24,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:05:23" (2/3) ... [2025-03-16 14:05:24,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d55f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:05:24, skipping insertion in model container [2025-03-16 14:05:24,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:05:24" (3/3) ... [2025-03-16 14:05:24,714 INFO L128 eAbstractionObserver]: Analyzing ICFG 2SB.i [2025-03-16 14:05:24,725 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 14:05:24,726 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 2SB.i that has 8 procedures, 160 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2025-03-16 14:05:24,766 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 14:05:24,773 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@2416eeb4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 14:05:24,773 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 14:05:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 137 states have (on average 1.5474452554744527) internal successors, (212), 140 states have internal predecessors, (212), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 14:05:24,781 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:24,782 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:24,782 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:24,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:24,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1498124063, now seen corresponding path program 1 times [2025-03-16 14:05:24,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:24,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88127215] [2025-03-16 14:05:24,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:24,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:24,901 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 14:05:24,920 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 14:05:24,922 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:24,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 14:05:25,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:25,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88127215] [2025-03-16 14:05:25,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88127215] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:25,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:25,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 14:05:25,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954995491] [2025-03-16 14:05:25,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:25,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:05:25,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:25,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:05:25,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:05:25,191 INFO L87 Difference]: Start difference. First operand has 160 states, 137 states have (on average 1.5474452554744527) internal successors, (212), 140 states have internal predecessors, (212), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:25,234 INFO L93 Difference]: Finished difference Result 319 states and 479 transitions. [2025-03-16 14:05:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:05:25,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2025-03-16 14:05:25,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:25,243 INFO L225 Difference]: With dead ends: 319 [2025-03-16 14:05:25,243 INFO L226 Difference]: Without dead ends: 152 [2025-03-16 14:05:25,246 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:05:25,249 INFO L435 NwaCegarLoop]: 213 mSDtfsCounter, 0 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:25,250 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 424 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:25,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2025-03-16 14:05:25,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2025-03-16 14:05:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 130 states have (on average 1.3153846153846154) internal successors, (171), 132 states have internal predecessors, (171), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:25,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 199 transitions. [2025-03-16 14:05:25,283 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 199 transitions. Word has length 38 [2025-03-16 14:05:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:25,283 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 199 transitions. [2025-03-16 14:05:25,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 199 transitions. [2025-03-16 14:05:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-16 14:05:25,289 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:25,289 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:25,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 14:05:25,289 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:25,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:25,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1443309766, now seen corresponding path program 1 times [2025-03-16 14:05:25,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:25,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826989083] [2025-03-16 14:05:25,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:25,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:25,341 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-16 14:05:25,353 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-16 14:05:25,353 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:25,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 14:05:25,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:25,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826989083] [2025-03-16 14:05:25,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826989083] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:25,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082957560] [2025-03-16 14:05:25,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:25,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:25,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:25,516 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) [2025-03-16 14:05:25,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 14:05:25,684 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-16 14:05:25,745 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-16 14:05:25,746 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:25,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:25,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 14:05:25,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:05:25,770 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082957560] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:25,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:25,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 14:05:25,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025443080] [2025-03-16 14:05:25,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:25,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:05:25,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:25,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:05:25,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:25,775 INFO L87 Difference]: Start difference. First operand 152 states and 199 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:05:25,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:25,797 INFO L93 Difference]: Finished difference Result 301 states and 396 transitions. [2025-03-16 14:05:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:05:25,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2025-03-16 14:05:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:25,799 INFO L225 Difference]: With dead ends: 301 [2025-03-16 14:05:25,799 INFO L226 Difference]: Without dead ends: 153 [2025-03-16 14:05:25,799 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:25,800 INFO L435 NwaCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:25,800 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 392 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2025-03-16 14:05:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2025-03-16 14:05:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 131 states have (on average 1.3129770992366412) internal successors, (172), 133 states have internal predecessors, (172), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 200 transitions. [2025-03-16 14:05:25,808 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 200 transitions. Word has length 40 [2025-03-16 14:05:25,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:25,809 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 200 transitions. [2025-03-16 14:05:25,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:05:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 200 transitions. [2025-03-16 14:05:25,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:05:25,810 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:25,810 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:25,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:26,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:26,011 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:26,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:26,011 INFO L85 PathProgramCache]: Analyzing trace with hash -916271132, now seen corresponding path program 1 times [2025-03-16 14:05:26,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:26,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641478288] [2025-03-16 14:05:26,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:26,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:26,049 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:05:26,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:05:26,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:26,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:05:26,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:26,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641478288] [2025-03-16 14:05:26,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641478288] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:26,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293243545] [2025-03-16 14:05:26,129 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:26,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:26,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:26,131 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) [2025-03-16 14:05:26,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 14:05:26,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:05:26,312 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:05:26,313 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:26,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:26,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 14:05:26,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:05:26,330 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:26,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293243545] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:26,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:26,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 14:05:26,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305638902] [2025-03-16 14:05:26,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:26,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:05:26,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:26,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:05:26,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:26,331 INFO L87 Difference]: Start difference. First operand 153 states and 200 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:05:26,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:26,368 INFO L93 Difference]: Finished difference Result 293 states and 383 transitions. [2025-03-16 14:05:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:05:26,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2025-03-16 14:05:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:26,372 INFO L225 Difference]: With dead ends: 293 [2025-03-16 14:05:26,372 INFO L226 Difference]: Without dead ends: 160 [2025-03-16 14:05:26,373 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:26,373 INFO L435 NwaCegarLoop]: 193 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:26,376 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 383 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:26,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2025-03-16 14:05:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2025-03-16 14:05:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 132 states have (on average 1.3106060606060606) internal successors, (173), 134 states have internal predecessors, (173), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 201 transitions. [2025-03-16 14:05:26,394 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 201 transitions. Word has length 42 [2025-03-16 14:05:26,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:26,394 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 201 transitions. [2025-03-16 14:05:26,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:05:26,394 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 201 transitions. [2025-03-16 14:05:26,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:05:26,395 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:26,395 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:26,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 14:05:26,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-16 14:05:26,596 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:26,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:26,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1907273056, now seen corresponding path program 1 times [2025-03-16 14:05:26,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:26,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546294801] [2025-03-16 14:05:26,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:26,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:26,635 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:05:26,637 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:05:26,637 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:26,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 14:05:26,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:26,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546294801] [2025-03-16 14:05:26,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546294801] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:26,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182297991] [2025-03-16 14:05:26,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:26,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:26,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:26,732 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) [2025-03-16 14:05:26,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 14:05:26,875 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:05:26,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:05:26,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:26,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:26,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 14:05:26,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:05:26,940 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:26,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182297991] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:26,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:26,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 14:05:26,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259134779] [2025-03-16 14:05:26,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:26,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:05:26,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:26,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:05:26,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:26,942 INFO L87 Difference]: Start difference. First operand 154 states and 201 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:05:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:26,971 INFO L93 Difference]: Finished difference Result 283 states and 371 transitions. [2025-03-16 14:05:26,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:05:26,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2025-03-16 14:05:26,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:26,973 INFO L225 Difference]: With dead ends: 283 [2025-03-16 14:05:26,973 INFO L226 Difference]: Without dead ends: 161 [2025-03-16 14:05:26,974 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:26,974 INFO L435 NwaCegarLoop]: 193 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:26,974 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 383 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2025-03-16 14:05:26,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2025-03-16 14:05:26,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 133 states have (on average 1.3082706766917294) internal successors, (174), 135 states have internal predecessors, (174), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 202 transitions. [2025-03-16 14:05:26,989 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 202 transitions. Word has length 45 [2025-03-16 14:05:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:26,989 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 202 transitions. [2025-03-16 14:05:26,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:05:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 202 transitions. [2025-03-16 14:05:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-16 14:05:26,992 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:26,992 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:26,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:27,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:27,197 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:27,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:27,198 INFO L85 PathProgramCache]: Analyzing trace with hash 961727454, now seen corresponding path program 1 times [2025-03-16 14:05:27,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:27,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353274628] [2025-03-16 14:05:27,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:27,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:27,229 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 14:05:27,232 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 14:05:27,232 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:27,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-16 14:05:27,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:27,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353274628] [2025-03-16 14:05:27,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353274628] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:27,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019352522] [2025-03-16 14:05:27,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:27,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:27,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:27,305 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) [2025-03-16 14:05:27,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 14:05:27,445 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 14:05:27,495 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 14:05:27,495 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:27,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:27,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 14:05:27,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:05:27,512 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:27,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019352522] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:27,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:27,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 14:05:27,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130110453] [2025-03-16 14:05:27,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:27,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:05:27,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:27,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:05:27,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:27,514 INFO L87 Difference]: Start difference. First operand 155 states and 202 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:27,585 INFO L93 Difference]: Finished difference Result 190 states and 256 transitions. [2025-03-16 14:05:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:05:27,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2025-03-16 14:05:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:27,586 INFO L225 Difference]: With dead ends: 190 [2025-03-16 14:05:27,586 INFO L226 Difference]: Without dead ends: 185 [2025-03-16 14:05:27,586 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:27,587 INFO L435 NwaCegarLoop]: 175 mSDtfsCounter, 47 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:27,587 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 348 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:05:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2025-03-16 14:05:27,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 156. [2025-03-16 14:05:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 134 states have (on average 1.3059701492537314) internal successors, (175), 136 states have internal predecessors, (175), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:27,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 203 transitions. [2025-03-16 14:05:27,612 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 203 transitions. Word has length 48 [2025-03-16 14:05:27,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:27,612 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 203 transitions. [2025-03-16 14:05:27,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:27,612 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 203 transitions. [2025-03-16 14:05:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-16 14:05:27,613 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:27,613 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:27,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 14:05:27,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:27,820 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:27,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:27,821 INFO L85 PathProgramCache]: Analyzing trace with hash -722666064, now seen corresponding path program 1 times [2025-03-16 14:05:27,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:27,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046934229] [2025-03-16 14:05:27,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:27,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:27,847 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 14:05:27,850 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 14:05:27,850 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:27,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:05:27,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:27,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046934229] [2025-03-16 14:05:27,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046934229] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:27,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920273089] [2025-03-16 14:05:27,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:27,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:27,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:27,955 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) [2025-03-16 14:05:27,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 14:05:28,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 14:05:28,152 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 14:05:28,152 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:28,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:28,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:28,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:05:28,192 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:28,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920273089] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:28,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:28,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:05:28,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954837200] [2025-03-16 14:05:28,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:28,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:05:28,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:28,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:05:28,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:28,194 INFO L87 Difference]: Start difference. First operand 156 states and 203 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:28,221 INFO L93 Difference]: Finished difference Result 194 states and 261 transitions. [2025-03-16 14:05:28,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:05:28,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2025-03-16 14:05:28,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:28,223 INFO L225 Difference]: With dead ends: 194 [2025-03-16 14:05:28,223 INFO L226 Difference]: Without dead ends: 159 [2025-03-16 14:05:28,223 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:28,223 INFO L435 NwaCegarLoop]: 195 mSDtfsCounter, 1 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:28,224 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 575 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2025-03-16 14:05:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2025-03-16 14:05:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 136 states have (on average 1.3014705882352942) internal successors, (177), 138 states have internal predecessors, (177), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 205 transitions. [2025-03-16 14:05:28,231 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 205 transitions. Word has length 58 [2025-03-16 14:05:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:28,231 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 205 transitions. [2025-03-16 14:05:28,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 205 transitions. [2025-03-16 14:05:28,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-16 14:05:28,234 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:28,234 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:28,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:28,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:28,438 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:28,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:28,438 INFO L85 PathProgramCache]: Analyzing trace with hash -593583345, now seen corresponding path program 1 times [2025-03-16 14:05:28,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:28,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730926259] [2025-03-16 14:05:28,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:28,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:28,481 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 14:05:28,484 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 14:05:28,484 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:28,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:05:28,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:28,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730926259] [2025-03-16 14:05:28,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730926259] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:28,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122779433] [2025-03-16 14:05:28,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:28,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:28,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:28,551 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) [2025-03-16 14:05:28,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 14:05:28,701 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 14:05:28,745 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 14:05:28,746 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:28,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:28,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:28,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:05:28,769 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:28,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122779433] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:28,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:28,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:05:28,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469123764] [2025-03-16 14:05:28,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:28,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:05:28,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:28,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:05:28,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:28,770 INFO L87 Difference]: Start difference. First operand 158 states and 205 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:28,789 INFO L93 Difference]: Finished difference Result 198 states and 265 transitions. [2025-03-16 14:05:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:05:28,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2025-03-16 14:05:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:28,791 INFO L225 Difference]: With dead ends: 198 [2025-03-16 14:05:28,791 INFO L226 Difference]: Without dead ends: 161 [2025-03-16 14:05:28,791 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:28,792 INFO L435 NwaCegarLoop]: 195 mSDtfsCounter, 1 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:28,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 575 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2025-03-16 14:05:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2025-03-16 14:05:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 138 states have (on average 1.2971014492753623) internal successors, (179), 140 states have internal predecessors, (179), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 207 transitions. [2025-03-16 14:05:28,797 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 207 transitions. Word has length 58 [2025-03-16 14:05:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:28,798 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 207 transitions. [2025-03-16 14:05:28,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 207 transitions. [2025-03-16 14:05:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-16 14:05:28,798 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:28,801 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:28,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:29,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:29,002 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:29,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:29,002 INFO L85 PathProgramCache]: Analyzing trace with hash -790096850, now seen corresponding path program 1 times [2025-03-16 14:05:29,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:29,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939248166] [2025-03-16 14:05:29,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:29,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:29,035 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 14:05:29,037 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 14:05:29,037 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:29,037 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:05:29,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939248166] [2025-03-16 14:05:29,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939248166] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549465282] [2025-03-16 14:05:29,099 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:29,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:29,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:29,102 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) [2025-03-16 14:05:29,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 14:05:29,249 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 14:05:29,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 14:05:29,291 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:29,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:29,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:29,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:05:29,310 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:29,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549465282] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:29,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:29,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:05:29,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265140136] [2025-03-16 14:05:29,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:29,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:05:29,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:29,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:05:29,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:29,312 INFO L87 Difference]: Start difference. First operand 160 states and 207 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:29,328 INFO L93 Difference]: Finished difference Result 202 states and 270 transitions. [2025-03-16 14:05:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:05:29,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2025-03-16 14:05:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:29,329 INFO L225 Difference]: With dead ends: 202 [2025-03-16 14:05:29,329 INFO L226 Difference]: Without dead ends: 163 [2025-03-16 14:05:29,329 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:29,330 INFO L435 NwaCegarLoop]: 195 mSDtfsCounter, 1 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:29,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 577 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2025-03-16 14:05:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2025-03-16 14:05:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 141 states have (on average 1.2907801418439717) internal successors, (182), 143 states have internal predecessors, (182), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 210 transitions. [2025-03-16 14:05:29,334 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 210 transitions. Word has length 58 [2025-03-16 14:05:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:29,334 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 210 transitions. [2025-03-16 14:05:29,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 210 transitions. [2025-03-16 14:05:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-16 14:05:29,335 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:29,335 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:29,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:29,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:29,536 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:29,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:29,536 INFO L85 PathProgramCache]: Analyzing trace with hash -217107439, now seen corresponding path program 1 times [2025-03-16 14:05:29,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:29,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204031543] [2025-03-16 14:05:29,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:29,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:29,573 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 14:05:29,575 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 14:05:29,575 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:29,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:05:29,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:29,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204031543] [2025-03-16 14:05:29,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204031543] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:29,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226587202] [2025-03-16 14:05:29,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:29,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:29,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:29,635 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:29,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 14:05:29,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 14:05:29,828 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 14:05:29,828 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:29,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:29,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:29,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:05:29,853 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:29,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226587202] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:29,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:29,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 14:05:29,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026912561] [2025-03-16 14:05:29,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:29,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:05:29,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:29,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:05:29,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:29,857 INFO L87 Difference]: Start difference. First operand 163 states and 210 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:29,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:29,870 INFO L93 Difference]: Finished difference Result 205 states and 271 transitions. [2025-03-16 14:05:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:05:29,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2025-03-16 14:05:29,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:29,872 INFO L225 Difference]: With dead ends: 205 [2025-03-16 14:05:29,872 INFO L226 Difference]: Without dead ends: 200 [2025-03-16 14:05:29,872 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:29,872 INFO L435 NwaCegarLoop]: 196 mSDtfsCounter, 37 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:29,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 390 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2025-03-16 14:05:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2025-03-16 14:05:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 177 states have (on average 1.3333333333333333) internal successors, (236), 179 states have internal predecessors, (236), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 264 transitions. [2025-03-16 14:05:29,882 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 264 transitions. Word has length 58 [2025-03-16 14:05:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:29,882 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 264 transitions. [2025-03-16 14:05:29,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 264 transitions. [2025-03-16 14:05:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-16 14:05:29,884 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:29,884 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:29,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:30,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-03-16 14:05:30,084 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:30,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:30,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2085704105, now seen corresponding path program 1 times [2025-03-16 14:05:30,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:30,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341583536] [2025-03-16 14:05:30,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:30,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:30,118 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-16 14:05:30,122 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-16 14:05:30,123 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:30,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:05:30,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:30,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341583536] [2025-03-16 14:05:30,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341583536] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:30,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782821921] [2025-03-16 14:05:30,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:30,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:30,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:30,180 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:30,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 14:05:30,337 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-16 14:05:30,377 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-16 14:05:30,377 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:30,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:30,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:30,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:05:30,391 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:30,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782821921] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:30,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:30,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:05:30,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947636809] [2025-03-16 14:05:30,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:30,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:05:30,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:30,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:05:30,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:30,393 INFO L87 Difference]: Start difference. First operand 199 states and 264 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:30,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:30,417 INFO L93 Difference]: Finished difference Result 284 states and 388 transitions. [2025-03-16 14:05:30,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:05:30,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2025-03-16 14:05:30,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:30,418 INFO L225 Difference]: With dead ends: 284 [2025-03-16 14:05:30,418 INFO L226 Difference]: Without dead ends: 205 [2025-03-16 14:05:30,419 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:30,419 INFO L435 NwaCegarLoop]: 195 mSDtfsCounter, 1 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:30,419 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 575 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2025-03-16 14:05:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2025-03-16 14:05:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 181 states have (on average 1.3259668508287292) internal successors, (240), 183 states have internal predecessors, (240), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 268 transitions. [2025-03-16 14:05:30,425 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 268 transitions. Word has length 64 [2025-03-16 14:05:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:30,426 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 268 transitions. [2025-03-16 14:05:30,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 268 transitions. [2025-03-16 14:05:30,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-16 14:05:30,426 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:30,426 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:30,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:30,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 14:05:30,627 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:30,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:30,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1889190600, now seen corresponding path program 1 times [2025-03-16 14:05:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:30,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700734099] [2025-03-16 14:05:30,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:30,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:30,668 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-16 14:05:30,670 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-16 14:05:30,670 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:30,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:05:30,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:30,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700734099] [2025-03-16 14:05:30,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700734099] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:30,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520970387] [2025-03-16 14:05:30,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:30,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:30,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:30,721 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:30,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 14:05:30,884 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-16 14:05:30,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-16 14:05:30,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:30,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:30,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:30,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:05:30,944 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:30,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520970387] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:30,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:30,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:05:30,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203691586] [2025-03-16 14:05:30,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:30,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:05:30,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:30,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:05:30,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:30,945 INFO L87 Difference]: Start difference. First operand 203 states and 268 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:30,964 INFO L93 Difference]: Finished difference Result 292 states and 398 transitions. [2025-03-16 14:05:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:05:30,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2025-03-16 14:05:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:30,966 INFO L225 Difference]: With dead ends: 292 [2025-03-16 14:05:30,966 INFO L226 Difference]: Without dead ends: 209 [2025-03-16 14:05:30,966 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:30,966 INFO L435 NwaCegarLoop]: 195 mSDtfsCounter, 1 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:30,966 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 577 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2025-03-16 14:05:30,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2025-03-16 14:05:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 187 states have (on average 1.3155080213903743) internal successors, (246), 189 states have internal predecessors, (246), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 274 transitions. [2025-03-16 14:05:30,973 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 274 transitions. Word has length 64 [2025-03-16 14:05:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:30,973 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 274 transitions. [2025-03-16 14:05:30,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:30,974 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 274 transitions. [2025-03-16 14:05:30,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-16 14:05:30,974 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:30,974 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:30,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-16 14:05:31,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-16 14:05:31,176 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:31,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1956621386, now seen corresponding path program 1 times [2025-03-16 14:05:31,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:31,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538458079] [2025-03-16 14:05:31,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:31,210 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-16 14:05:31,214 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-16 14:05:31,214 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:31,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:05:31,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:31,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538458079] [2025-03-16 14:05:31,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538458079] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:31,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043345575] [2025-03-16 14:05:31,286 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:31,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:31,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:31,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:31,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 14:05:31,499 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-16 14:05:31,546 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-16 14:05:31,546 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:31,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:31,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:31,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:05:31,581 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:31,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043345575] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:31,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:31,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 14:05:31,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176149952] [2025-03-16 14:05:31,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:31,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:05:31,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:31,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:05:31,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:31,582 INFO L87 Difference]: Start difference. First operand 209 states and 274 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:31,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:31,593 INFO L93 Difference]: Finished difference Result 298 states and 400 transitions. [2025-03-16 14:05:31,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:05:31,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2025-03-16 14:05:31,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:31,594 INFO L225 Difference]: With dead ends: 298 [2025-03-16 14:05:31,594 INFO L226 Difference]: Without dead ends: 293 [2025-03-16 14:05:31,595 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:31,595 INFO L435 NwaCegarLoop]: 197 mSDtfsCounter, 31 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:31,595 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 391 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:31,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2025-03-16 14:05:31,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2025-03-16 14:05:31,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 271 states have (on average 1.3505535055350553) internal successors, (366), 273 states have internal predecessors, (366), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 394 transitions. [2025-03-16 14:05:31,601 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 394 transitions. Word has length 64 [2025-03-16 14:05:31,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:31,601 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 394 transitions. [2025-03-16 14:05:31,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:31,601 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 394 transitions. [2025-03-16 14:05:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-03-16 14:05:31,602 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:31,602 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2025-03-16 14:05:31,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:31,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-16 14:05:31,802 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:31,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1816100221, now seen corresponding path program 1 times [2025-03-16 14:05:31,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:31,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318886662] [2025-03-16 14:05:31,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:31,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:31,829 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 74 statements into 1 equivalence classes. [2025-03-16 14:05:31,831 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 74 of 74 statements. [2025-03-16 14:05:31,831 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:31,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-16 14:05:31,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:31,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318886662] [2025-03-16 14:05:31,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318886662] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:31,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835137325] [2025-03-16 14:05:31,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:31,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:31,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:31,875 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:31,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 14:05:32,062 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 74 statements into 1 equivalence classes. [2025-03-16 14:05:32,106 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 74 of 74 statements. [2025-03-16 14:05:32,106 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:32,106 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:32,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:32,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-16 14:05:32,140 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:32,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835137325] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:32,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:32,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 14:05:32,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508569317] [2025-03-16 14:05:32,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:32,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:05:32,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:32,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:05:32,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:32,141 INFO L87 Difference]: Start difference. First operand 293 states and 394 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:32,150 INFO L93 Difference]: Finished difference Result 466 states and 640 transitions. [2025-03-16 14:05:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:05:32,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 74 [2025-03-16 14:05:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:32,152 INFO L225 Difference]: With dead ends: 466 [2025-03-16 14:05:32,152 INFO L226 Difference]: Without dead ends: 461 [2025-03-16 14:05:32,152 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:32,152 INFO L435 NwaCegarLoop]: 196 mSDtfsCounter, 26 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:32,153 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 390 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:32,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2025-03-16 14:05:32,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2025-03-16 14:05:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 439 states have (on average 1.3804100227790432) internal successors, (606), 441 states have internal predecessors, (606), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 634 transitions. [2025-03-16 14:05:32,161 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 634 transitions. Word has length 74 [2025-03-16 14:05:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:32,162 INFO L471 AbstractCegarLoop]: Abstraction has 461 states and 634 transitions. [2025-03-16 14:05:32,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 634 transitions. [2025-03-16 14:05:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-03-16 14:05:32,163 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:32,163 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:32,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:32,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 14:05:32,367 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:32,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:32,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1462827039, now seen corresponding path program 1 times [2025-03-16 14:05:32,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:32,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916090291] [2025-03-16 14:05:32,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:32,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:32,394 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-16 14:05:32,396 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-16 14:05:32,396 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:32,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-16 14:05:32,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:32,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916090291] [2025-03-16 14:05:32,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916090291] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:32,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034913135] [2025-03-16 14:05:32,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:32,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:32,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:32,454 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:32,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 14:05:32,666 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-16 14:05:32,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-16 14:05:32,712 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:32,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:32,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:32,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-16 14:05:32,730 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:32,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034913135] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:32,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:32,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:05:32,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134048680] [2025-03-16 14:05:32,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:32,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:05:32,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:32,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:05:32,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:32,731 INFO L87 Difference]: Start difference. First operand 461 states and 634 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:32,751 INFO L93 Difference]: Finished difference Result 826 states and 1152 transitions. [2025-03-16 14:05:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:05:32,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 98 [2025-03-16 14:05:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:32,754 INFO L225 Difference]: With dead ends: 826 [2025-03-16 14:05:32,754 INFO L226 Difference]: Without dead ends: 485 [2025-03-16 14:05:32,754 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:32,754 INFO L435 NwaCegarLoop]: 195 mSDtfsCounter, 1 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:32,755 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 575 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:32,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2025-03-16 14:05:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 477. [2025-03-16 14:05:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 455 states have (on average 1.367032967032967) internal successors, (622), 457 states have internal predecessors, (622), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 650 transitions. [2025-03-16 14:05:32,766 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 650 transitions. Word has length 98 [2025-03-16 14:05:32,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:32,767 INFO L471 AbstractCegarLoop]: Abstraction has 477 states and 650 transitions. [2025-03-16 14:05:32,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:32,767 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 650 transitions. [2025-03-16 14:05:32,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-03-16 14:05:32,768 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:32,768 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:32,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-16 14:05:32,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-16 14:05:32,969 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:32,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:32,969 INFO L85 PathProgramCache]: Analyzing trace with hash 487473216, now seen corresponding path program 1 times [2025-03-16 14:05:32,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:32,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323536121] [2025-03-16 14:05:32,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:32,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:32,995 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-16 14:05:32,997 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-16 14:05:32,997 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:32,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-16 14:05:33,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:33,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323536121] [2025-03-16 14:05:33,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323536121] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:33,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559376063] [2025-03-16 14:05:33,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:33,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:33,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:33,046 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:33,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 14:05:33,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-16 14:05:33,319 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-16 14:05:33,319 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:33,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:33,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:33,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-16 14:05:33,334 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:33,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559376063] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:33,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:33,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:05:33,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477508228] [2025-03-16 14:05:33,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:33,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:05:33,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:33,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:05:33,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:33,336 INFO L87 Difference]: Start difference. First operand 477 states and 650 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:33,359 INFO L93 Difference]: Finished difference Result 858 states and 1192 transitions. [2025-03-16 14:05:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:05:33,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 98 [2025-03-16 14:05:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:33,362 INFO L225 Difference]: With dead ends: 858 [2025-03-16 14:05:33,362 INFO L226 Difference]: Without dead ends: 501 [2025-03-16 14:05:33,363 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:33,363 INFO L435 NwaCegarLoop]: 195 mSDtfsCounter, 1 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:33,363 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 577 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:33,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2025-03-16 14:05:33,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2025-03-16 14:05:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 479 states have (on average 1.3486430062630481) internal successors, (646), 481 states have internal predecessors, (646), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 674 transitions. [2025-03-16 14:05:33,371 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 674 transitions. Word has length 98 [2025-03-16 14:05:33,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:33,371 INFO L471 AbstractCegarLoop]: Abstraction has 501 states and 674 transitions. [2025-03-16 14:05:33,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:33,372 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 674 transitions. [2025-03-16 14:05:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-03-16 14:05:33,372 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:33,372 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:33,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-16 14:05:33,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:33,573 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:33,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:33,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1199336258, now seen corresponding path program 1 times [2025-03-16 14:05:33,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:33,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113404373] [2025-03-16 14:05:33,574 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:33,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:33,598 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-16 14:05:33,600 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-16 14:05:33,600 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:33,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-16 14:05:33,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:33,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113404373] [2025-03-16 14:05:33,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113404373] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:33,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417556677] [2025-03-16 14:05:33,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:33,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:33,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:33,645 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:33,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 14:05:33,879 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-16 14:05:33,929 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-16 14:05:33,929 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:33,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:33,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:33,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-16 14:05:34,006 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:34,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417556677] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:34,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:34,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 14:05:34,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219178441] [2025-03-16 14:05:34,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:34,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:05:34,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:34,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:05:34,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:34,007 INFO L87 Difference]: Start difference. First operand 501 states and 674 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:34,023 INFO L93 Difference]: Finished difference Result 882 states and 1200 transitions. [2025-03-16 14:05:34,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:05:34,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 98 [2025-03-16 14:05:34,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:34,027 INFO L225 Difference]: With dead ends: 882 [2025-03-16 14:05:34,027 INFO L226 Difference]: Without dead ends: 877 [2025-03-16 14:05:34,027 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:34,028 INFO L435 NwaCegarLoop]: 196 mSDtfsCounter, 14 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:34,028 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 389 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2025-03-16 14:05:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2025-03-16 14:05:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 855 states have (on average 1.3637426900584795) internal successors, (1166), 857 states have internal predecessors, (1166), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1194 transitions. [2025-03-16 14:05:34,052 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1194 transitions. Word has length 98 [2025-03-16 14:05:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:34,052 INFO L471 AbstractCegarLoop]: Abstraction has 877 states and 1194 transitions. [2025-03-16 14:05:34,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1194 transitions. [2025-03-16 14:05:34,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2025-03-16 14:05:34,056 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:34,056 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1] [2025-03-16 14:05:34,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-16 14:05:34,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-16 14:05:34,260 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:34,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash 973909345, now seen corresponding path program 1 times [2025-03-16 14:05:34,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:34,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798105564] [2025-03-16 14:05:34,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:34,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:34,299 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 128 statements into 1 equivalence classes. [2025-03-16 14:05:34,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 128 of 128 statements. [2025-03-16 14:05:34,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:34,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2025-03-16 14:05:34,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:34,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798105564] [2025-03-16 14:05:34,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798105564] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:34,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423977325] [2025-03-16 14:05:34,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:34,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:34,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:34,359 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:34,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 14:05:34,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 128 statements into 1 equivalence classes. [2025-03-16 14:05:34,644 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 128 of 128 statements. [2025-03-16 14:05:34,644 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:34,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:34,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:34,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-16 14:05:34,662 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:34,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423977325] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:34,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:34,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:05:34,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694361389] [2025-03-16 14:05:34,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:34,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:05:34,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:34,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:05:34,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:34,663 INFO L87 Difference]: Start difference. First operand 877 states and 1194 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:34,697 INFO L93 Difference]: Finished difference Result 1682 states and 2320 transitions. [2025-03-16 14:05:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:05:34,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 128 [2025-03-16 14:05:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:34,702 INFO L225 Difference]: With dead ends: 1682 [2025-03-16 14:05:34,702 INFO L226 Difference]: Without dead ends: 925 [2025-03-16 14:05:34,703 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:34,703 INFO L435 NwaCegarLoop]: 195 mSDtfsCounter, 1 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:34,705 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 577 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:34,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2025-03-16 14:05:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 925. [2025-03-16 14:05:34,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 903 states have (on average 1.3444075304540422) internal successors, (1214), 905 states have internal predecessors, (1214), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1242 transitions. [2025-03-16 14:05:34,726 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1242 transitions. Word has length 128 [2025-03-16 14:05:34,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:34,726 INFO L471 AbstractCegarLoop]: Abstraction has 925 states and 1242 transitions. [2025-03-16 14:05:34,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:05:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1242 transitions. [2025-03-16 14:05:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2025-03-16 14:05:34,728 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:34,728 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1] [2025-03-16 14:05:34,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-16 14:05:34,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-16 14:05:34,929 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:34,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:34,929 INFO L85 PathProgramCache]: Analyzing trace with hash 872997378, now seen corresponding path program 1 times [2025-03-16 14:05:34,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:34,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95238494] [2025-03-16 14:05:34,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:34,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:34,955 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 128 statements into 1 equivalence classes. [2025-03-16 14:05:34,957 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 128 of 128 statements. [2025-03-16 14:05:34,957 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:34,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2025-03-16 14:05:35,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:35,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95238494] [2025-03-16 14:05:35,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95238494] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:35,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890173405] [2025-03-16 14:05:35,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:35,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:35,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:35,003 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:35,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 14:05:35,230 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 128 statements into 1 equivalence classes. [2025-03-16 14:05:35,285 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 128 of 128 statements. [2025-03-16 14:05:35,285 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:35,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:35,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:35,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2025-03-16 14:05:35,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:05:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2025-03-16 14:05:35,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890173405] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:05:35,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:05:35,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2025-03-16 14:05:35,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969951133] [2025-03-16 14:05:35,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:05:35,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:05:35,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:35,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:05:35,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:05:35,359 INFO L87 Difference]: Start difference. First operand 925 states and 1242 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 1 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2025-03-16 14:05:35,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:35,383 INFO L93 Difference]: Finished difference Result 1850 states and 2486 transitions. [2025-03-16 14:05:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:05:35,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 1 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 128 [2025-03-16 14:05:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:35,386 INFO L225 Difference]: With dead ends: 1850 [2025-03-16 14:05:35,387 INFO L226 Difference]: Without dead ends: 928 [2025-03-16 14:05:35,389 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:05:35,389 INFO L435 NwaCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:35,389 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 587 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2025-03-16 14:05:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2025-03-16 14:05:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 906 states have (on average 1.3432671081677705) internal successors, (1217), 908 states have internal predecessors, (1217), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1245 transitions. [2025-03-16 14:05:35,407 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1245 transitions. Word has length 128 [2025-03-16 14:05:35,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:35,409 INFO L471 AbstractCegarLoop]: Abstraction has 928 states and 1245 transitions. [2025-03-16 14:05:35,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 1 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2025-03-16 14:05:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1245 transitions. [2025-03-16 14:05:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2025-03-16 14:05:35,411 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:35,411 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2025-03-16 14:05:35,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:35,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-16 14:05:35,612 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:35,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:35,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1306485670, now seen corresponding path program 2 times [2025-03-16 14:05:35,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:35,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213898077] [2025-03-16 14:05:35,612 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:05:35,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:35,654 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 131 statements into 2 equivalence classes. [2025-03-16 14:05:35,695 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 131 of 131 statements. [2025-03-16 14:05:35,695 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:05:35,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2025-03-16 14:05:35,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:35,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213898077] [2025-03-16 14:05:35,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213898077] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:35,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850251852] [2025-03-16 14:05:35,774 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:05:35,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:35,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:35,777 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:35,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 14:05:36,006 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 131 statements into 2 equivalence classes. [2025-03-16 14:05:36,299 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 131 of 131 statements. [2025-03-16 14:05:36,299 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:05:36,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:36,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 14:05:36,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2025-03-16 14:05:36,338 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:05:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2025-03-16 14:05:36,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850251852] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:05:36,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:05:36,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 13 [2025-03-16 14:05:36,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6475969] [2025-03-16 14:05:36,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:05:36,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 14:05:36,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:36,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 14:05:36,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:05:36,397 INFO L87 Difference]: Start difference. First operand 928 states and 1245 transitions. Second operand has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-16 14:05:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:36,431 INFO L93 Difference]: Finished difference Result 1856 states and 2497 transitions. [2025-03-16 14:05:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 14:05:36,432 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 131 [2025-03-16 14:05:36,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:36,435 INFO L225 Difference]: With dead ends: 1856 [2025-03-16 14:05:36,435 INFO L226 Difference]: Without dead ends: 934 [2025-03-16 14:05:36,436 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:05:36,437 INFO L435 NwaCegarLoop]: 196 mSDtfsCounter, 0 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:36,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1166 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:36,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2025-03-16 14:05:36,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 934. [2025-03-16 14:05:36,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 912 states have (on average 1.3410087719298245) internal successors, (1223), 914 states have internal predecessors, (1223), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 14:05:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1251 transitions. [2025-03-16 14:05:36,452 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1251 transitions. Word has length 131 [2025-03-16 14:05:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:36,452 INFO L471 AbstractCegarLoop]: Abstraction has 934 states and 1251 transitions. [2025-03-16 14:05:36,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-16 14:05:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1251 transitions. [2025-03-16 14:05:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2025-03-16 14:05:36,454 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:36,454 INFO L218 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:36,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:36,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:36,655 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:36,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:36,655 INFO L85 PathProgramCache]: Analyzing trace with hash -374456156, now seen corresponding path program 3 times [2025-03-16 14:05:36,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:36,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146135151] [2025-03-16 14:05:36,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 14:05:36,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:36,702 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 138 statements into 6 equivalence classes. [2025-03-16 14:05:36,750 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 53 of 138 statements. [2025-03-16 14:05:36,751 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 14:05:36,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2025-03-16 14:05:37,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:37,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146135151] [2025-03-16 14:05:37,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146135151] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:37,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:37,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-16 14:05:37,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813281124] [2025-03-16 14:05:37,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:37,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:05:37,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:37,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:05:37,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:05:37,081 INFO L87 Difference]: Start difference. First operand 934 states and 1251 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:05:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:38,029 INFO L93 Difference]: Finished difference Result 1816 states and 2446 transitions. [2025-03-16 14:05:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:05:38,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 138 [2025-03-16 14:05:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:38,033 INFO L225 Difference]: With dead ends: 1816 [2025-03-16 14:05:38,034 INFO L226 Difference]: Without dead ends: 1004 [2025-03-16 14:05:38,035 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:05:38,035 INFO L435 NwaCegarLoop]: 173 mSDtfsCounter, 181 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:38,035 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 889 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-16 14:05:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2025-03-16 14:05:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 975. [2025-03-16 14:05:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 947 states have (on average 1.3368532206969377) internal successors, (1266), 951 states have internal predecessors, (1266), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2025-03-16 14:05:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1306 transitions. [2025-03-16 14:05:38,058 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1306 transitions. Word has length 138 [2025-03-16 14:05:38,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:38,058 INFO L471 AbstractCegarLoop]: Abstraction has 975 states and 1306 transitions. [2025-03-16 14:05:38,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:05:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1306 transitions. [2025-03-16 14:05:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2025-03-16 14:05:38,061 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:38,061 INFO L218 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:38,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-16 14:05:38,061 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:38,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash 619749807, now seen corresponding path program 1 times [2025-03-16 14:05:38,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:38,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392781859] [2025-03-16 14:05:38,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:38,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:38,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 156 statements into 1 equivalence classes. [2025-03-16 14:05:38,120 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 156 of 156 statements. [2025-03-16 14:05:38,121 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:38,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2025-03-16 14:05:38,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:38,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392781859] [2025-03-16 14:05:38,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392781859] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:38,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317497858] [2025-03-16 14:05:38,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:38,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:38,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:38,203 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:38,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 14:05:38,479 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 156 statements into 1 equivalence classes. [2025-03-16 14:05:38,553 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 156 of 156 statements. [2025-03-16 14:05:38,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:38,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:38,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:38,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2025-03-16 14:05:38,573 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:05:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2025-03-16 14:05:38,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317497858] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:05:38,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:05:38,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-16 14:05:38,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849882354] [2025-03-16 14:05:38,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:05:38,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:05:38,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:38,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:05:38,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:05:38,605 INFO L87 Difference]: Start difference. First operand 975 states and 1306 transitions. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 14:05:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:38,658 INFO L93 Difference]: Finished difference Result 1941 states and 2605 transitions. [2025-03-16 14:05:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:05:38,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 156 [2025-03-16 14:05:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:38,662 INFO L225 Difference]: With dead ends: 1941 [2025-03-16 14:05:38,662 INFO L226 Difference]: Without dead ends: 996 [2025-03-16 14:05:38,663 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:05:38,663 INFO L435 NwaCegarLoop]: 193 mSDtfsCounter, 28 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:38,663 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 762 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:38,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2025-03-16 14:05:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 996. [2025-03-16 14:05:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 965 states have (on average 1.3336787564766839) internal successors, (1287), 969 states have internal predecessors, (1287), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2025-03-16 14:05:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1333 transitions. [2025-03-16 14:05:38,680 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1333 transitions. Word has length 156 [2025-03-16 14:05:38,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:38,680 INFO L471 AbstractCegarLoop]: Abstraction has 996 states and 1333 transitions. [2025-03-16 14:05:38,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 14:05:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1333 transitions. [2025-03-16 14:05:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2025-03-16 14:05:38,682 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:38,682 INFO L218 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:38,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:38,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:38,883 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:38,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1798282265, now seen corresponding path program 2 times [2025-03-16 14:05:38,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:38,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228839488] [2025-03-16 14:05:38,884 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:05:38,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:38,924 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 165 statements into 2 equivalence classes. [2025-03-16 14:05:38,949 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 165 of 165 statements. [2025-03-16 14:05:38,949 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:05:38,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-16 14:05:39,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:39,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228839488] [2025-03-16 14:05:39,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228839488] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:39,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274562734] [2025-03-16 14:05:39,055 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:05:39,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:39,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:39,057 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:39,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 14:05:39,357 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 165 statements into 2 equivalence classes. [2025-03-16 14:05:39,641 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 165 of 165 statements. [2025-03-16 14:05:39,641 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:05:39,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:39,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 14:05:39,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2025-03-16 14:05:39,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:05:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2025-03-16 14:05:39,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274562734] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:05:39,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:05:39,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 13 [2025-03-16 14:05:39,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834854152] [2025-03-16 14:05:39,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:05:39,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 14:05:39,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:39,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 14:05:39,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:05:39,752 INFO L87 Difference]: Start difference. First operand 996 states and 1333 transitions. Second operand has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 14:05:39,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:39,903 INFO L93 Difference]: Finished difference Result 1989 states and 2670 transitions. [2025-03-16 14:05:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 14:05:39,904 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 165 [2025-03-16 14:05:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:39,907 INFO L225 Difference]: With dead ends: 1989 [2025-03-16 14:05:39,907 INFO L226 Difference]: Without dead ends: 1044 [2025-03-16 14:05:39,908 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:05:39,909 INFO L435 NwaCegarLoop]: 192 mSDtfsCounter, 62 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:39,909 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1328 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:05:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2025-03-16 14:05:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1038. [2025-03-16 14:05:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1001 states have (on average 1.3276723276723277) internal successors, (1329), 1005 states have internal predecessors, (1329), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2025-03-16 14:05:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1387 transitions. [2025-03-16 14:05:39,927 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1387 transitions. Word has length 165 [2025-03-16 14:05:39,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:39,928 INFO L471 AbstractCegarLoop]: Abstraction has 1038 states and 1387 transitions. [2025-03-16 14:05:39,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 14:05:39,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1387 transitions. [2025-03-16 14:05:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2025-03-16 14:05:39,930 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:39,930 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:39,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-16 14:05:40,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-16 14:05:40,131 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:40,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:40,131 INFO L85 PathProgramCache]: Analyzing trace with hash 830411693, now seen corresponding path program 3 times [2025-03-16 14:05:40,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:40,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194740263] [2025-03-16 14:05:40,131 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 14:05:40,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:40,182 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 183 statements into 11 equivalence classes. [2025-03-16 14:05:40,221 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 71 of 183 statements. [2025-03-16 14:05:40,221 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 14:05:40,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2025-03-16 14:05:40,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:40,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194740263] [2025-03-16 14:05:40,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194740263] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:40,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345122726] [2025-03-16 14:05:40,805 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 14:05:40,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:40,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:40,807 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:40,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 14:05:41,137 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 183 statements into 11 equivalence classes. [2025-03-16 14:05:41,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 71 of 183 statements. [2025-03-16 14:05:41,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 14:05:41,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:41,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-16 14:05:41,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:41,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 19 [2025-03-16 14:05:41,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:05:41,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2025-03-16 14:05:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2025-03-16 14:05:42,003 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:42,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345122726] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:42,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:42,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2025-03-16 14:05:42,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842504435] [2025-03-16 14:05:42,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:42,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:05:42,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:42,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:05:42,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:05:42,004 INFO L87 Difference]: Start difference. First operand 1038 states and 1387 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:05:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:42,949 INFO L93 Difference]: Finished difference Result 2023 states and 2714 transitions. [2025-03-16 14:05:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:05:42,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 183 [2025-03-16 14:05:42,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:42,954 INFO L225 Difference]: With dead ends: 2023 [2025-03-16 14:05:42,954 INFO L226 Difference]: Without dead ends: 1211 [2025-03-16 14:05:42,955 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:05:42,956 INFO L435 NwaCegarLoop]: 164 mSDtfsCounter, 234 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:42,956 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 821 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-16 14:05:42,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2025-03-16 14:05:42,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1169. [2025-03-16 14:05:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1109 states have (on average 1.321009918845807) internal successors, (1465), 1127 states have internal predecessors, (1465), 51 states have call successors, (51), 8 states have call predecessors, (51), 8 states have return successors, (51), 37 states have call predecessors, (51), 51 states have call successors, (51) [2025-03-16 14:05:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1567 transitions. [2025-03-16 14:05:42,985 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1567 transitions. Word has length 183 [2025-03-16 14:05:42,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:42,985 INFO L471 AbstractCegarLoop]: Abstraction has 1169 states and 1567 transitions. [2025-03-16 14:05:42,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:05:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1567 transitions. [2025-03-16 14:05:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2025-03-16 14:05:42,989 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:42,989 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:42,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:43,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-16 14:05:43,190 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:43,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:43,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1491789830, now seen corresponding path program 1 times [2025-03-16 14:05:43,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:43,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158773526] [2025-03-16 14:05:43,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:43,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:43,242 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 205 statements into 1 equivalence classes. [2025-03-16 14:05:43,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 205 of 205 statements. [2025-03-16 14:05:43,283 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:43,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2025-03-16 14:05:43,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:43,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158773526] [2025-03-16 14:05:43,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158773526] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:43,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:43,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 14:05:43,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807543448] [2025-03-16 14:05:43,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:43,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:05:43,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:43,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:05:43,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:43,514 INFO L87 Difference]: Start difference. First operand 1169 states and 1567 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:43,657 INFO L93 Difference]: Finished difference Result 2614 states and 3509 transitions. [2025-03-16 14:05:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:05:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 205 [2025-03-16 14:05:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:43,663 INFO L225 Difference]: With dead ends: 2614 [2025-03-16 14:05:43,663 INFO L226 Difference]: Without dead ends: 1809 [2025-03-16 14:05:43,665 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:43,665 INFO L435 NwaCegarLoop]: 179 mSDtfsCounter, 28 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:43,665 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 687 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:05:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2025-03-16 14:05:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1441. [2025-03-16 14:05:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1381 states have (on average 1.3041274438812456) internal successors, (1801), 1399 states have internal predecessors, (1801), 51 states have call successors, (51), 8 states have call predecessors, (51), 8 states have return successors, (51), 37 states have call predecessors, (51), 51 states have call successors, (51) [2025-03-16 14:05:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 1903 transitions. [2025-03-16 14:05:43,698 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 1903 transitions. Word has length 205 [2025-03-16 14:05:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:43,698 INFO L471 AbstractCegarLoop]: Abstraction has 1441 states and 1903 transitions. [2025-03-16 14:05:43,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 1903 transitions. [2025-03-16 14:05:43,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2025-03-16 14:05:43,701 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:43,702 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:43,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-03-16 14:05:43,702 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:43,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:43,702 INFO L85 PathProgramCache]: Analyzing trace with hash -387368572, now seen corresponding path program 1 times [2025-03-16 14:05:43,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:43,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429675771] [2025-03-16 14:05:43,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:43,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:43,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 205 statements into 1 equivalence classes. [2025-03-16 14:05:43,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 205 of 205 statements. [2025-03-16 14:05:43,793 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:43,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2025-03-16 14:05:43,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:43,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429675771] [2025-03-16 14:05:43,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429675771] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:43,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:43,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:05:43,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300120632] [2025-03-16 14:05:43,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:43,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:05:43,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:43,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:05:43,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:05:43,927 INFO L87 Difference]: Start difference. First operand 1441 states and 1903 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:43,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:43,958 INFO L93 Difference]: Finished difference Result 2550 states and 3381 transitions. [2025-03-16 14:05:43,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:05:43,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 205 [2025-03-16 14:05:43,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:43,963 INFO L225 Difference]: With dead ends: 2550 [2025-03-16 14:05:43,964 INFO L226 Difference]: Without dead ends: 1473 [2025-03-16 14:05:43,966 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:05:43,967 INFO L435 NwaCegarLoop]: 195 mSDtfsCounter, 1 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:43,968 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 575 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2025-03-16 14:05:43,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1473. [2025-03-16 14:05:43,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1413 states have (on average 1.29723991507431) internal successors, (1833), 1431 states have internal predecessors, (1833), 51 states have call successors, (51), 8 states have call predecessors, (51), 8 states have return successors, (51), 37 states have call predecessors, (51), 51 states have call successors, (51) [2025-03-16 14:05:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 1935 transitions. [2025-03-16 14:05:44,001 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 1935 transitions. Word has length 205 [2025-03-16 14:05:44,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:44,001 INFO L471 AbstractCegarLoop]: Abstraction has 1473 states and 1935 transitions. [2025-03-16 14:05:44,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 1935 transitions. [2025-03-16 14:05:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2025-03-16 14:05:44,005 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:44,005 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:44,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2025-03-16 14:05:44,005 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:44,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:44,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2037537815, now seen corresponding path program 1 times [2025-03-16 14:05:44,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:44,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936478989] [2025-03-16 14:05:44,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:44,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:44,059 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 205 statements into 1 equivalence classes. [2025-03-16 14:05:44,083 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 205 of 205 statements. [2025-03-16 14:05:44,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:44,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2025-03-16 14:05:44,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:44,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936478989] [2025-03-16 14:05:44,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936478989] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:44,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:44,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 14:05:44,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433915661] [2025-03-16 14:05:44,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:44,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:05:44,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:44,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:05:44,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:05:44,275 INFO L87 Difference]: Start difference. First operand 1473 states and 1935 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:44,406 INFO L93 Difference]: Finished difference Result 3110 states and 4069 transitions. [2025-03-16 14:05:44,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:05:44,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 205 [2025-03-16 14:05:44,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:44,413 INFO L225 Difference]: With dead ends: 3110 [2025-03-16 14:05:44,413 INFO L226 Difference]: Without dead ends: 2001 [2025-03-16 14:05:44,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:44,416 INFO L435 NwaCegarLoop]: 184 mSDtfsCounter, 16 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:44,417 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 696 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:05:44,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2025-03-16 14:05:44,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1841. [2025-03-16 14:05:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1781 states have (on average 1.2807411566535654) internal successors, (2281), 1799 states have internal predecessors, (2281), 51 states have call successors, (51), 8 states have call predecessors, (51), 8 states have return successors, (51), 37 states have call predecessors, (51), 51 states have call successors, (51) [2025-03-16 14:05:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2383 transitions. [2025-03-16 14:05:44,449 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2383 transitions. Word has length 205 [2025-03-16 14:05:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:44,450 INFO L471 AbstractCegarLoop]: Abstraction has 1841 states and 2383 transitions. [2025-03-16 14:05:44,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:44,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2383 transitions. [2025-03-16 14:05:44,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2025-03-16 14:05:44,453 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:44,453 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:44,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-16 14:05:44,454 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:44,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:44,455 INFO L85 PathProgramCache]: Analyzing trace with hash 449581960, now seen corresponding path program 1 times [2025-03-16 14:05:44,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:44,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453497926] [2025-03-16 14:05:44,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:44,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:44,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 205 statements into 1 equivalence classes. [2025-03-16 14:05:44,523 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 205 of 205 statements. [2025-03-16 14:05:44,523 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:44,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2025-03-16 14:05:44,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:44,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453497926] [2025-03-16 14:05:44,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453497926] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:44,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:44,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:05:44,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460115012] [2025-03-16 14:05:44,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:44,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:05:44,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:44,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:05:44,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:05:44,640 INFO L87 Difference]: Start difference. First operand 1841 states and 2383 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:44,666 INFO L93 Difference]: Finished difference Result 3350 states and 4341 transitions. [2025-03-16 14:05:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:05:44,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 205 [2025-03-16 14:05:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:44,670 INFO L225 Difference]: With dead ends: 3350 [2025-03-16 14:05:44,671 INFO L226 Difference]: Without dead ends: 1873 [2025-03-16 14:05:44,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:05:44,672 INFO L435 NwaCegarLoop]: 195 mSDtfsCounter, 1 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:44,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 575 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2025-03-16 14:05:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1873. [2025-03-16 14:05:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1813 states have (on average 1.2757859900717043) internal successors, (2313), 1831 states have internal predecessors, (2313), 51 states have call successors, (51), 8 states have call predecessors, (51), 8 states have return successors, (51), 37 states have call predecessors, (51), 51 states have call successors, (51) [2025-03-16 14:05:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 2415 transitions. [2025-03-16 14:05:44,702 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 2415 transitions. Word has length 205 [2025-03-16 14:05:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:44,702 INFO L471 AbstractCegarLoop]: Abstraction has 1873 states and 2415 transitions. [2025-03-16 14:05:44,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 2415 transitions. [2025-03-16 14:05:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2025-03-16 14:05:44,706 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:44,706 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:44,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2025-03-16 14:05:44,706 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:44,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:44,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1737177204, now seen corresponding path program 2 times [2025-03-16 14:05:44,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:44,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732712589] [2025-03-16 14:05:44,707 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:05:44,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:44,753 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 205 statements into 2 equivalence classes. [2025-03-16 14:05:44,783 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 205 of 205 statements. [2025-03-16 14:05:44,783 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:05:44,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2025-03-16 14:05:44,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:44,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732712589] [2025-03-16 14:05:44,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732712589] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:44,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444193633] [2025-03-16 14:05:44,886 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:05:44,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:44,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:44,889 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:44,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 14:05:45,293 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 205 statements into 2 equivalence classes. [2025-03-16 14:05:45,578 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 205 of 205 statements. [2025-03-16 14:05:45,578 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:05:45,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:45,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 14:05:45,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2025-03-16 14:05:45,605 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:05:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2025-03-16 14:05:45,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444193633] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:05:45,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:05:45,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-03-16 14:05:45,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810371696] [2025-03-16 14:05:45,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:05:45,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:05:45,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:45,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:05:45,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:05:45,652 INFO L87 Difference]: Start difference. First operand 1873 states and 2415 transitions. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-16 14:05:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:45,722 INFO L93 Difference]: Finished difference Result 3638 states and 4698 transitions. [2025-03-16 14:05:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:05:45,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 205 [2025-03-16 14:05:45,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:45,728 INFO L225 Difference]: With dead ends: 3638 [2025-03-16 14:05:45,728 INFO L226 Difference]: Without dead ends: 1917 [2025-03-16 14:05:45,730 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:05:45,731 INFO L435 NwaCegarLoop]: 196 mSDtfsCounter, 47 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:45,731 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 395 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:05:45,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2025-03-16 14:05:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1917. [2025-03-16 14:05:45,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1849 states have (on average 1.2747431043807465) internal successors, (2357), 1871 states have internal predecessors, (2357), 59 states have call successors, (59), 8 states have call predecessors, (59), 8 states have return successors, (59), 41 states have call predecessors, (59), 59 states have call successors, (59) [2025-03-16 14:05:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2475 transitions. [2025-03-16 14:05:45,766 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2475 transitions. Word has length 205 [2025-03-16 14:05:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:45,766 INFO L471 AbstractCegarLoop]: Abstraction has 1917 states and 2475 transitions. [2025-03-16 14:05:45,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-16 14:05:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2475 transitions. [2025-03-16 14:05:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2025-03-16 14:05:45,770 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:45,770 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:45,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:45,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-16 14:05:45,971 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:45,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:45,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1831459084, now seen corresponding path program 3 times [2025-03-16 14:05:45,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:45,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006100347] [2025-03-16 14:05:45,972 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 14:05:45,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:46,019 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 217 statements into 11 equivalence classes. [2025-03-16 14:05:46,056 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 89 of 217 statements. [2025-03-16 14:05:46,056 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 14:05:46,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2025-03-16 14:05:46,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:46,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006100347] [2025-03-16 14:05:46,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006100347] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:46,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:46,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-16 14:05:46,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047812191] [2025-03-16 14:05:46,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:46,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:05:46,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:46,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:05:46,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:05:46,296 INFO L87 Difference]: Start difference. First operand 1917 states and 2475 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:46,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:46,521 INFO L93 Difference]: Finished difference Result 4226 states and 5409 transitions. [2025-03-16 14:05:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:05:46,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 217 [2025-03-16 14:05:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:46,528 INFO L225 Difference]: With dead ends: 4226 [2025-03-16 14:05:46,528 INFO L226 Difference]: Without dead ends: 2717 [2025-03-16 14:05:46,530 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:05:46,530 INFO L435 NwaCegarLoop]: 205 mSDtfsCounter, 28 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:46,531 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1087 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:05:46,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2025-03-16 14:05:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 2221. [2025-03-16 14:05:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2221 states, 2153 states have (on average 1.2805387830933581) internal successors, (2757), 2175 states have internal predecessors, (2757), 59 states have call successors, (59), 8 states have call predecessors, (59), 8 states have return successors, (59), 41 states have call predecessors, (59), 59 states have call successors, (59) [2025-03-16 14:05:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 2875 transitions. [2025-03-16 14:05:46,580 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 2875 transitions. Word has length 217 [2025-03-16 14:05:46,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:46,580 INFO L471 AbstractCegarLoop]: Abstraction has 2221 states and 2875 transitions. [2025-03-16 14:05:46,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:46,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 2875 transitions. [2025-03-16 14:05:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2025-03-16 14:05:46,585 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:46,585 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:46,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2025-03-16 14:05:46,585 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:46,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:46,586 INFO L85 PathProgramCache]: Analyzing trace with hash -242584151, now seen corresponding path program 4 times [2025-03-16 14:05:46,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:46,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147992358] [2025-03-16 14:05:46,586 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 14:05:46,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:46,648 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 217 statements into 2 equivalence classes. [2025-03-16 14:05:46,657 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 161 of 217 statements. [2025-03-16 14:05:46,658 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 14:05:46,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2025-03-16 14:05:46,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:46,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147992358] [2025-03-16 14:05:46,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147992358] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:46,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880819020] [2025-03-16 14:05:46,762 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 14:05:46,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:46,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:46,763 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:46,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-16 14:05:47,147 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 217 statements into 2 equivalence classes. [2025-03-16 14:05:47,189 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 161 of 217 statements. [2025-03-16 14:05:47,189 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 14:05:47,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:47,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 14:05:47,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2025-03-16 14:05:47,220 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:05:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2025-03-16 14:05:47,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880819020] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:05:47,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:05:47,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-03-16 14:05:47,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594899969] [2025-03-16 14:05:47,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:05:47,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 14:05:47,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:47,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 14:05:47,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:05:47,285 INFO L87 Difference]: Start difference. First operand 2221 states and 2875 transitions. Second operand has 12 states, 12 states have (on average 11.833333333333334) internal successors, (142), 12 states have internal predecessors, (142), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-16 14:05:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:47,398 INFO L93 Difference]: Finished difference Result 4279 states and 5541 transitions. [2025-03-16 14:05:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 14:05:47,398 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.833333333333334) internal successors, (142), 12 states have internal predecessors, (142), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 217 [2025-03-16 14:05:47,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:47,404 INFO L225 Difference]: With dead ends: 4279 [2025-03-16 14:05:47,404 INFO L226 Difference]: Without dead ends: 2254 [2025-03-16 14:05:47,406 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 426 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:05:47,407 INFO L435 NwaCegarLoop]: 202 mSDtfsCounter, 48 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:47,407 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 789 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:05:47,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2025-03-16 14:05:47,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2254. [2025-03-16 14:05:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2180 states have (on average 1.2798165137614679) internal successors, (2790), 2205 states have internal predecessors, (2790), 65 states have call successors, (65), 8 states have call predecessors, (65), 8 states have return successors, (65), 44 states have call predecessors, (65), 65 states have call successors, (65) [2025-03-16 14:05:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2920 transitions. [2025-03-16 14:05:47,469 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2920 transitions. Word has length 217 [2025-03-16 14:05:47,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:47,469 INFO L471 AbstractCegarLoop]: Abstraction has 2254 states and 2920 transitions. [2025-03-16 14:05:47,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.833333333333334) internal successors, (142), 12 states have internal predecessors, (142), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-16 14:05:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2920 transitions. [2025-03-16 14:05:47,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2025-03-16 14:05:47,474 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:47,474 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:47,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-16 14:05:47,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:47,675 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:47,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:47,675 INFO L85 PathProgramCache]: Analyzing trace with hash -202541653, now seen corresponding path program 5 times [2025-03-16 14:05:47,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:47,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638745065] [2025-03-16 14:05:47,675 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 14:05:47,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:47,725 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 226 statements into 11 equivalence classes. [2025-03-16 14:05:47,737 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 99 of 226 statements. [2025-03-16 14:05:47,738 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-16 14:05:47,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2025-03-16 14:05:47,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:47,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638745065] [2025-03-16 14:05:47,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638745065] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:47,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:47,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-16 14:05:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500922977] [2025-03-16 14:05:47,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:47,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:05:47,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:05:47,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:05:47,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:05:47,866 INFO L87 Difference]: Start difference. First operand 2254 states and 2920 transitions. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:48,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:48,026 INFO L93 Difference]: Finished difference Result 4531 states and 5854 transitions. [2025-03-16 14:05:48,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:05:48,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 226 [2025-03-16 14:05:48,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:48,035 INFO L225 Difference]: With dead ends: 4531 [2025-03-16 14:05:48,035 INFO L226 Difference]: Without dead ends: 2718 [2025-03-16 14:05:48,037 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:05:48,037 INFO L435 NwaCegarLoop]: 200 mSDtfsCounter, 44 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:48,037 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 909 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:05:48,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2718 states. [2025-03-16 14:05:48,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2718 to 2590. [2025-03-16 14:05:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2516 states have (on average 1.2869634340222575) internal successors, (3238), 2541 states have internal predecessors, (3238), 65 states have call successors, (65), 8 states have call predecessors, (65), 8 states have return successors, (65), 44 states have call predecessors, (65), 65 states have call successors, (65) [2025-03-16 14:05:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 3368 transitions. [2025-03-16 14:05:48,070 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 3368 transitions. Word has length 226 [2025-03-16 14:05:48,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:48,070 INFO L471 AbstractCegarLoop]: Abstraction has 2590 states and 3368 transitions. [2025-03-16 14:05:48,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 3368 transitions. [2025-03-16 14:05:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2025-03-16 14:05:48,074 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:48,074 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:48,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2025-03-16 14:05:48,075 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:48,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:48,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2112823383, now seen corresponding path program 6 times [2025-03-16 14:05:48,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:05:48,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232519865] [2025-03-16 14:05:48,075 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 14:05:48,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:05:48,118 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 226 statements into 11 equivalence classes. [2025-03-16 14:05:48,218 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 139 of 226 statements. [2025-03-16 14:05:48,219 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 14:05:48,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2025-03-16 14:05:48,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:05:48,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232519865] [2025-03-16 14:05:48,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232519865] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:48,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937840070] [2025-03-16 14:05:48,922 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 14:05:48,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:48,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:48,924 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:48,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-16 14:05:49,364 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 226 statements into 11 equivalence classes. [2025-03-16 14:05:57,787 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 139 of 226 statements. [2025-03-16 14:05:57,787 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 14:05:57,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:57,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-16 14:05:57,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:58,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 73 [2025-03-16 14:05:58,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:05:58,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 81 [2025-03-16 14:05:59,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:05:59,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 74 [2025-03-16 14:05:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2025-03-16 14:05:59,219 INFO L312 TraceCheckSpWp]: Computing backward predicates...