/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-12.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 15:29:21,120 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 15:29:21,190 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 15:29:21,193 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 15:29:21,194 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 15:29:21,216 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 15:29:21,216 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 15:29:21,217 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 15:29:21,217 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 15:29:21,220 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 15:29:21,220 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 15:29:21,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 15:29:21,221 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 15:29:21,222 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 15:29:21,222 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 15:29:21,222 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 15:29:21,223 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 15:29:21,223 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 15:29:21,223 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 15:29:21,224 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 15:29:21,224 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 15:29:21,224 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 15:29:21,224 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 15:29:21,225 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 15:29:21,225 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 15:29:21,225 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 15:29:21,225 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 15:29:21,225 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 15:29:21,226 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 15:29:21,226 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 15:29:21,226 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 15:29:21,226 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 15:29:21,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 15:29:21,227 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 15:29:21,227 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 15:29:21,227 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 15:29:21,227 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 15:29:21,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 15:29:21,227 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 15:29:21,227 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 15:29:21,227 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 15:29:21,228 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 15:29:21,228 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 15:29:21,228 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 15:29:21,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 15:29:21,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 15:29:21,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 15:29:21,486 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 15:29:21,488 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 15:29:21,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-12.i [2023-12-19 15:29:22,639 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 15:29:22,783 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 15:29:22,784 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-12.i [2023-12-19 15:29:22,791 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/189eb1cbe/96b1ee48d561444ea6d5c21ec88a4040/FLAGe4adfa055 [2023-12-19 15:29:22,800 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/189eb1cbe/96b1ee48d561444ea6d5c21ec88a4040 [2023-12-19 15:29:22,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 15:29:22,802 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 15:29:22,805 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 15:29:22,805 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 15:29:22,808 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 15:29:22,809 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 03:29:22" (1/1) ... [2023-12-19 15:29:22,810 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23efbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:22, skipping insertion in model container [2023-12-19 15:29:22,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 03:29:22" (1/1) ... [2023-12-19 15:29:22,837 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 15:29:22,929 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-12.i[916,929] [2023-12-19 15:29:22,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 15:29:22,970 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 15:29:22,978 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-12.i[916,929] [2023-12-19 15:29:22,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 15:29:23,010 INFO L206 MainTranslator]: Completed translation [2023-12-19 15:29:23,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23 WrapperNode [2023-12-19 15:29:23,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 15:29:23,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 15:29:23,011 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 15:29:23,011 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 15:29:23,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23" (1/1) ... [2023-12-19 15:29:23,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23" (1/1) ... [2023-12-19 15:29:23,072 INFO L138 Inliner]: procedures = 26, calls = 161, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 474 [2023-12-19 15:29:23,073 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 15:29:23,073 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 15:29:23,073 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 15:29:23,074 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 15:29:23,081 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23" (1/1) ... [2023-12-19 15:29:23,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23" (1/1) ... [2023-12-19 15:29:23,085 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23" (1/1) ... [2023-12-19 15:29:23,111 INFO L175 MemorySlicer]: Split 123 memory accesses to 12 slices as follows [2, 5, 6, 6, 8, 10, 23, 10, 18, 20, 7, 8]. 19 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]. The 14 writes are split as follows [0, 2, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1]. [2023-12-19 15:29:23,111 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23" (1/1) ... [2023-12-19 15:29:23,111 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23" (1/1) ... [2023-12-19 15:29:23,121 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23" (1/1) ... [2023-12-19 15:29:23,124 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23" (1/1) ... [2023-12-19 15:29:23,126 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23" (1/1) ... [2023-12-19 15:29:23,128 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23" (1/1) ... [2023-12-19 15:29:23,132 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 15:29:23,133 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 15:29:23,133 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 15:29:23,133 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 15:29:23,135 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23" (1/1) ... [2023-12-19 15:29:23,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 15:29:23,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:23,178 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) [2023-12-19 15:29:23,234 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 [2023-12-19 15:29:23,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 15:29:23,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-19 15:29:23,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-19 15:29:23,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-19 15:29:23,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-19 15:29:23,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-19 15:29:23,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-12-19 15:29:23,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-12-19 15:29:23,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-12-19 15:29:23,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2023-12-19 15:29:23,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2023-12-19 15:29:23,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2023-12-19 15:29:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2023-12-19 15:29:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-19 15:29:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-19 15:29:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-19 15:29:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-19 15:29:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-19 15:29:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-12-19 15:29:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-12-19 15:29:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-12-19 15:29:23,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2023-12-19 15:29:23,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2023-12-19 15:29:23,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2023-12-19 15:29:23,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2023-12-19 15:29:23,245 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 15:29:23,245 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 15:29:23,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 15:29:23,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-19 15:29:23,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-19 15:29:23,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-19 15:29:23,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-19 15:29:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-12-19 15:29:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-12-19 15:29:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-12-19 15:29:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-12-19 15:29:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-12-19 15:29:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-12-19 15:29:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-12-19 15:29:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 15:29:23,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 15:29:23,391 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 15:29:23,394 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 15:29:23,734 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 15:29:23,756 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 15:29:23,756 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 15:29:23,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 03:29:23 BoogieIcfgContainer [2023-12-19 15:29:23,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 15:29:23,758 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 15:29:23,758 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 15:29:23,760 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 15:29:23,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 03:29:22" (1/3) ... [2023-12-19 15:29:23,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ca294c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 03:29:23, skipping insertion in model container [2023-12-19 15:29:23,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 03:29:23" (2/3) ... [2023-12-19 15:29:23,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ca294c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 03:29:23, skipping insertion in model container [2023-12-19 15:29:23,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 03:29:23" (3/3) ... [2023-12-19 15:29:23,762 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-p_file-12.i [2023-12-19 15:29:23,774 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 15:29:23,774 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 15:29:23,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 15:29:23,820 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@79c72281, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 15:29:23,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 15:29:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 73 states have internal predecessors, (103), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-19 15:29:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-19 15:29:23,846 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:23,846 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:23,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:23,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:23,852 INFO L85 PathProgramCache]: Analyzing trace with hash 800962782, now seen corresponding path program 1 times [2023-12-19 15:29:23,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:23,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754202382] [2023-12-19 15:29:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:23,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:24,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:24,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754202382] [2023-12-19 15:29:24,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 15:29:24,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061992485] [2023-12-19 15:29:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:24,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:24,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:24,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:24,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 15:29:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:24,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 15:29:24,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-12-19 15:29:24,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:24,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061992485] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:24,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:24,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 15:29:24,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114527853] [2023-12-19 15:29:24,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:24,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 15:29:24,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:24,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 15:29:24,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 15:29:24,383 INFO L87 Difference]: Start difference. First operand has 91 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 73 states have internal predecessors, (103), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-19 15:29:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:24,421 INFO L93 Difference]: Finished difference Result 173 states and 274 transitions. [2023-12-19 15:29:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 15:29:24,423 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 112 [2023-12-19 15:29:24,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:24,429 INFO L225 Difference]: With dead ends: 173 [2023-12-19 15:29:24,429 INFO L226 Difference]: Without dead ends: 83 [2023-12-19 15:29:24,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 15:29:24,435 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:24,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 15:29:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-19 15:29:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-19 15:29:24,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.323076923076923) internal successors, (86), 65 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-19 15:29:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2023-12-19 15:29:24,484 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 112 [2023-12-19 15:29:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:24,484 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2023-12-19 15:29:24,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-19 15:29:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2023-12-19 15:29:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-19 15:29:24,493 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:24,494 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:24,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 15:29:24,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-19 15:29:24,705 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:24,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:24,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1146482878, now seen corresponding path program 1 times [2023-12-19 15:29:24,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:24,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584062740] [2023-12-19 15:29:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:24,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:24,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820812670] [2023-12-19 15:29:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:24,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:24,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:24,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:24,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 15:29:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:25,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 15:29:25,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:25,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:25,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:25,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584062740] [2023-12-19 15:29:25,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:25,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820812670] [2023-12-19 15:29:25,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820812670] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:25,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:25,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 15:29:25,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488202298] [2023-12-19 15:29:25,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:25,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 15:29:25,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:25,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 15:29:25,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 15:29:25,076 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:25,106 INFO L93 Difference]: Finished difference Result 165 states and 235 transitions. [2023-12-19 15:29:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 15:29:25,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 112 [2023-12-19 15:29:25,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:25,107 INFO L225 Difference]: With dead ends: 165 [2023-12-19 15:29:25,107 INFO L226 Difference]: Without dead ends: 83 [2023-12-19 15:29:25,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:29:25,109 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 45 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:25,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 286 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 15:29:25,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-19 15:29:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-19 15:29:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 65 states have internal predecessors, (85), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-19 15:29:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 117 transitions. [2023-12-19 15:29:25,115 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 117 transitions. Word has length 112 [2023-12-19 15:29:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:25,116 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 117 transitions. [2023-12-19 15:29:25,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 117 transitions. [2023-12-19 15:29:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-19 15:29:25,117 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:25,117 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:25,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:25,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-19 15:29:25,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:25,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:25,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1770995456, now seen corresponding path program 1 times [2023-12-19 15:29:25,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:25,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474586855] [2023-12-19 15:29:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:25,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:25,390 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:25,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109117862] [2023-12-19 15:29:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:25,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:25,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:25,397 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:25,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 15:29:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:25,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 15:29:25,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:25,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:25,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:25,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474586855] [2023-12-19 15:29:25,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:25,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109117862] [2023-12-19 15:29:25,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109117862] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:25,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:25,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:29:25,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029770148] [2023-12-19 15:29:25,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:25,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:29:25,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:25,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:29:25,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:29:25,645 INFO L87 Difference]: Start difference. First operand 83 states and 117 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:25,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:25,682 INFO L93 Difference]: Finished difference Result 177 states and 250 transitions. [2023-12-19 15:29:25,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 15:29:25,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 114 [2023-12-19 15:29:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:25,683 INFO L225 Difference]: With dead ends: 177 [2023-12-19 15:29:25,683 INFO L226 Difference]: Without dead ends: 95 [2023-12-19 15:29:25,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:29:25,684 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 65 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:25,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 410 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 15:29:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-19 15:29:25,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2023-12-19 15:29:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 68 states have internal predecessors, (88), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-19 15:29:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 120 transitions. [2023-12-19 15:29:25,691 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 120 transitions. Word has length 114 [2023-12-19 15:29:25,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:25,691 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 120 transitions. [2023-12-19 15:29:25,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:25,691 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 120 transitions. [2023-12-19 15:29:25,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-19 15:29:25,692 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:25,692 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:25,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:25,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:25,901 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:25,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash 206005468, now seen corresponding path program 1 times [2023-12-19 15:29:25,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:25,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124086715] [2023-12-19 15:29:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:25,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:25,932 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:25,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40123961] [2023-12-19 15:29:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:25,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:25,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:25,945 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:25,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 15:29:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:26,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-19 15:29:26,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:26,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-19 15:29:26,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2023-12-19 15:29:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:26,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:26,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:26,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124086715] [2023-12-19 15:29:26,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:26,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40123961] [2023-12-19 15:29:26,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40123961] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:26,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:26,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 15:29:26,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444958484] [2023-12-19 15:29:26,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:26,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 15:29:26,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:26,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 15:29:26,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 15:29:26,301 INFO L87 Difference]: Start difference. First operand 86 states and 120 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:26,377 INFO L93 Difference]: Finished difference Result 158 states and 215 transitions. [2023-12-19 15:29:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 15:29:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 116 [2023-12-19 15:29:26,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:26,378 INFO L225 Difference]: With dead ends: 158 [2023-12-19 15:29:26,378 INFO L226 Difference]: Without dead ends: 156 [2023-12-19 15:29:26,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-19 15:29:26,379 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 103 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:26,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 699 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 15:29:26,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-12-19 15:29:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2023-12-19 15:29:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 119 states have (on average 1.2605042016806722) internal successors, (150), 120 states have internal predecessors, (150), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:29:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 210 transitions. [2023-12-19 15:29:26,389 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 210 transitions. Word has length 116 [2023-12-19 15:29:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:26,389 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 210 transitions. [2023-12-19 15:29:26,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 210 transitions. [2023-12-19 15:29:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-19 15:29:26,390 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:26,390 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:26,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:26,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:26,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:26,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash -862420349, now seen corresponding path program 1 times [2023-12-19 15:29:26,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:26,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033152056] [2023-12-19 15:29:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:26,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:26,624 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:26,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680462259] [2023-12-19 15:29:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:26,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:26,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:26,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:26,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 15:29:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:26,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 67 conjunts are in the unsatisfiable core [2023-12-19 15:29:26,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:27,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-19 15:29:27,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-19 15:29:28,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-19 15:29:28,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-19 15:29:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 46 proven. 302 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-12-19 15:29:28,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 15:29:28,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-12-19 15:29:29,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2023-12-19 15:29:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 114 proven. 48 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-12-19 15:29:29,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:29,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033152056] [2023-12-19 15:29:29,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:29,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680462259] [2023-12-19 15:29:29,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680462259] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 15:29:29,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 15:29:29,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2023-12-19 15:29:29,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936166228] [2023-12-19 15:29:29,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 15:29:29,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-19 15:29:29,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:29,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-19 15:29:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=2081, Unknown=0, NotChecked=0, Total=2352 [2023-12-19 15:29:29,337 INFO L87 Difference]: Start difference. First operand 152 states and 210 transitions. Second operand has 49 states, 41 states have (on average 2.5853658536585367) internal successors, (106), 43 states have internal predecessors, (106), 12 states have call successors, (32), 5 states have call predecessors, (32), 11 states have return successors, (32), 10 states have call predecessors, (32), 12 states have call successors, (32) [2023-12-19 15:29:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:32,179 INFO L93 Difference]: Finished difference Result 265 states and 338 transitions. [2023-12-19 15:29:32,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-19 15:29:32,180 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 41 states have (on average 2.5853658536585367) internal successors, (106), 43 states have internal predecessors, (106), 12 states have call successors, (32), 5 states have call predecessors, (32), 11 states have return successors, (32), 10 states have call predecessors, (32), 12 states have call successors, (32) Word has length 117 [2023-12-19 15:29:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:32,188 INFO L225 Difference]: With dead ends: 265 [2023-12-19 15:29:32,189 INFO L226 Difference]: Without dead ends: 263 [2023-12-19 15:29:32,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1473, Invalid=6899, Unknown=0, NotChecked=0, Total=8372 [2023-12-19 15:29:32,209 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 1541 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1542 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:32,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1542 Valid, 1414 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-19 15:29:32,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-12-19 15:29:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 176. [2023-12-19 15:29:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 137 states have (on average 1.2262773722627738) internal successors, (168), 138 states have internal predecessors, (168), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:29:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 228 transitions. [2023-12-19 15:29:32,239 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 228 transitions. Word has length 117 [2023-12-19 15:29:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:32,240 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 228 transitions. [2023-12-19 15:29:32,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 41 states have (on average 2.5853658536585367) internal successors, (106), 43 states have internal predecessors, (106), 12 states have call successors, (32), 5 states have call predecessors, (32), 11 states have return successors, (32), 10 states have call predecessors, (32), 12 states have call successors, (32) [2023-12-19 15:29:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 228 transitions. [2023-12-19 15:29:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-19 15:29:32,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:32,241 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:32,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:32,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:32,463 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:32,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:32,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1236684999, now seen corresponding path program 1 times [2023-12-19 15:29:32,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:32,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17373142] [2023-12-19 15:29:32,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:32,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:32,505 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:32,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276716770] [2023-12-19 15:29:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:32,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:32,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:32,522 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:32,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 15:29:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:32,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-19 15:29:32,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:33,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-19 15:29:33,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-19 15:29:33,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-19 15:29:33,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-19 15:29:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 46 proven. 302 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-12-19 15:29:33,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 15:29:34,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-12-19 15:29:34,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2023-12-19 15:29:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 114 proven. 48 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-12-19 15:29:35,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:35,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17373142] [2023-12-19 15:29:35,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:35,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276716770] [2023-12-19 15:29:35,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276716770] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 15:29:35,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 15:29:35,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2023-12-19 15:29:35,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87090088] [2023-12-19 15:29:35,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 15:29:35,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-19 15:29:35,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:35,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-19 15:29:35,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2023-12-19 15:29:35,019 INFO L87 Difference]: Start difference. First operand 176 states and 228 transitions. Second operand has 51 states, 43 states have (on average 2.511627906976744) internal successors, (108), 45 states have internal predecessors, (108), 12 states have call successors, (32), 5 states have call predecessors, (32), 11 states have return successors, (32), 10 states have call predecessors, (32), 12 states have call successors, (32) [2023-12-19 15:29:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:37,108 INFO L93 Difference]: Finished difference Result 197 states and 247 transitions. [2023-12-19 15:29:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-19 15:29:37,109 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 43 states have (on average 2.511627906976744) internal successors, (108), 45 states have internal predecessors, (108), 12 states have call successors, (32), 5 states have call predecessors, (32), 11 states have return successors, (32), 10 states have call predecessors, (32), 12 states have call successors, (32) Word has length 118 [2023-12-19 15:29:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:37,111 INFO L225 Difference]: With dead ends: 197 [2023-12-19 15:29:37,111 INFO L226 Difference]: Without dead ends: 195 [2023-12-19 15:29:37,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1336, Invalid=5974, Unknown=0, NotChecked=0, Total=7310 [2023-12-19 15:29:37,114 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 1123 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:37,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 1361 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 15:29:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-12-19 15:29:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 181. [2023-12-19 15:29:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 142 states have internal predecessors, (172), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:29:37,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 232 transitions. [2023-12-19 15:29:37,145 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 232 transitions. Word has length 118 [2023-12-19 15:29:37,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:37,146 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 232 transitions. [2023-12-19 15:29:37,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 43 states have (on average 2.511627906976744) internal successors, (108), 45 states have internal predecessors, (108), 12 states have call successors, (32), 5 states have call predecessors, (32), 11 states have return successors, (32), 10 states have call predecessors, (32), 12 states have call successors, (32) [2023-12-19 15:29:37,146 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 232 transitions. [2023-12-19 15:29:37,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-19 15:29:37,147 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:37,147 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:37,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:37,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:37,354 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:37,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:37,354 INFO L85 PathProgramCache]: Analyzing trace with hash 756075619, now seen corresponding path program 1 times [2023-12-19 15:29:37,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:37,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445932140] [2023-12-19 15:29:37,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:37,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:37,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:37,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773199411] [2023-12-19 15:29:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:37,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:37,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:37,382 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:37,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 15:29:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:37,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-19 15:29:37,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:37,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-19 15:29:37,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-19 15:29:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:37,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:37,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:37,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445932140] [2023-12-19 15:29:37,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:37,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773199411] [2023-12-19 15:29:37,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773199411] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:37,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:37,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:29:37,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107994568] [2023-12-19 15:29:37,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:37,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:29:37,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:37,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:29:37,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:29:37,591 INFO L87 Difference]: Start difference. First operand 181 states and 232 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:37,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:37,631 INFO L93 Difference]: Finished difference Result 439 states and 564 transitions. [2023-12-19 15:29:37,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 15:29:37,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 119 [2023-12-19 15:29:37,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:37,633 INFO L225 Difference]: With dead ends: 439 [2023-12-19 15:29:37,634 INFO L226 Difference]: Without dead ends: 259 [2023-12-19 15:29:37,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 15:29:37,635 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 62 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:37,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 428 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 15:29:37,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-12-19 15:29:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 202. [2023-12-19 15:29:37,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 162 states have (on average 1.2160493827160495) internal successors, (197), 163 states have internal predecessors, (197), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:29:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 257 transitions. [2023-12-19 15:29:37,665 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 257 transitions. Word has length 119 [2023-12-19 15:29:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:37,665 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 257 transitions. [2023-12-19 15:29:37,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:37,665 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 257 transitions. [2023-12-19 15:29:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-19 15:29:37,667 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:37,667 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:37,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:37,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:37,873 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:37,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:37,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1255421784, now seen corresponding path program 1 times [2023-12-19 15:29:37,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:37,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51346404] [2023-12-19 15:29:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:37,900 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:37,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561255564] [2023-12-19 15:29:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:37,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:37,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:37,919 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:37,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 15:29:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:38,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-19 15:29:38,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:38,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-19 15:29:38,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-12-19 15:29:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 10 proven. 250 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-12-19 15:29:38,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 15:29:38,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2023-12-19 15:29:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-12-19 15:29:38,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:38,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51346404] [2023-12-19 15:29:38,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:38,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561255564] [2023-12-19 15:29:38,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561255564] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 15:29:38,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 15:29:38,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-12-19 15:29:38,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931835131] [2023-12-19 15:29:38,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 15:29:38,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 15:29:38,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:38,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 15:29:38,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-12-19 15:29:38,565 INFO L87 Difference]: Start difference. First operand 202 states and 257 transitions. Second operand has 15 states, 13 states have (on average 5.846153846153846) internal successors, (76), 14 states have internal predecessors, (76), 7 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (32), 5 states have call predecessors, (32), 7 states have call successors, (32) [2023-12-19 15:29:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:38,778 INFO L93 Difference]: Finished difference Result 419 states and 527 transitions. [2023-12-19 15:29:38,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 15:29:38,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 5.846153846153846) internal successors, (76), 14 states have internal predecessors, (76), 7 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (32), 5 states have call predecessors, (32), 7 states have call successors, (32) Word has length 119 [2023-12-19 15:29:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:38,785 INFO L225 Difference]: With dead ends: 419 [2023-12-19 15:29:38,785 INFO L226 Difference]: Without dead ends: 218 [2023-12-19 15:29:38,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2023-12-19 15:29:38,787 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 213 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:38,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 394 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:29:38,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-12-19 15:29:38,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2023-12-19 15:29:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 168 states have (on average 1.1964285714285714) internal successors, (201), 169 states have internal predecessors, (201), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:29:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 261 transitions. [2023-12-19 15:29:38,814 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 261 transitions. Word has length 119 [2023-12-19 15:29:38,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:38,814 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 261 transitions. [2023-12-19 15:29:38,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 5.846153846153846) internal successors, (76), 14 states have internal predecessors, (76), 7 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (32), 5 states have call predecessors, (32), 7 states have call successors, (32) [2023-12-19 15:29:38,815 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 261 transitions. [2023-12-19 15:29:38,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-19 15:29:38,818 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:38,818 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:38,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-19 15:29:39,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-19 15:29:39,025 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:39,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:39,026 INFO L85 PathProgramCache]: Analyzing trace with hash 214911180, now seen corresponding path program 1 times [2023-12-19 15:29:39,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:39,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141013346] [2023-12-19 15:29:39,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:39,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:39,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:39,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907824791] [2023-12-19 15:29:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:39,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:39,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:39,046 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:39,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 15:29:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:39,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-19 15:29:39,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:39,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-19 15:29:39,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-12-19 15:29:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 10 proven. 250 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-12-19 15:29:39,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 15:29:39,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2023-12-19 15:29:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-12-19 15:29:39,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:39,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141013346] [2023-12-19 15:29:39,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:39,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907824791] [2023-12-19 15:29:39,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907824791] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 15:29:39,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 15:29:39,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-12-19 15:29:39,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365267278] [2023-12-19 15:29:39,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 15:29:39,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 15:29:39,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:39,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 15:29:39,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-12-19 15:29:39,764 INFO L87 Difference]: Start difference. First operand 210 states and 261 transitions. Second operand has 15 states, 13 states have (on average 6.769230769230769) internal successors, (88), 14 states have internal predecessors, (88), 7 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (32), 5 states have call predecessors, (32), 7 states have call successors, (32) [2023-12-19 15:29:40,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:40,005 INFO L93 Difference]: Finished difference Result 427 states and 529 transitions. [2023-12-19 15:29:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 15:29:40,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 6.769230769230769) internal successors, (88), 14 states have internal predecessors, (88), 7 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (32), 5 states have call predecessors, (32), 7 states have call successors, (32) Word has length 120 [2023-12-19 15:29:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:40,007 INFO L225 Difference]: With dead ends: 427 [2023-12-19 15:29:40,007 INFO L226 Difference]: Without dead ends: 218 [2023-12-19 15:29:40,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2023-12-19 15:29:40,009 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 258 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:40,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 390 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:29:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-12-19 15:29:40,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2023-12-19 15:29:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 168 states have (on average 1.1845238095238095) internal successors, (199), 169 states have internal predecessors, (199), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:29:40,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 259 transitions. [2023-12-19 15:29:40,022 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 259 transitions. Word has length 120 [2023-12-19 15:29:40,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:40,022 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 259 transitions. [2023-12-19 15:29:40,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 6.769230769230769) internal successors, (88), 14 states have internal predecessors, (88), 7 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (32), 5 states have call predecessors, (32), 7 states have call successors, (32) [2023-12-19 15:29:40,022 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 259 transitions. [2023-12-19 15:29:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-12-19 15:29:40,023 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:40,023 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:40,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:40,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:40,230 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:40,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:40,230 INFO L85 PathProgramCache]: Analyzing trace with hash -452558770, now seen corresponding path program 1 times [2023-12-19 15:29:40,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:40,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499408006] [2023-12-19 15:29:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:40,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:40,249 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:40,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286137105] [2023-12-19 15:29:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:40,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:40,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:40,250 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:40,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 15:29:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:40,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 15:29:40,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:40,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-12-19 15:29:40,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2023-12-19 15:29:40,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-19 15:29:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:40,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:40,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:40,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499408006] [2023-12-19 15:29:40,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:40,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286137105] [2023-12-19 15:29:40,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286137105] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:40,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:40,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:29:40,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222506949] [2023-12-19 15:29:40,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:40,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:29:40,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:40,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:29:40,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:29:40,504 INFO L87 Difference]: Start difference. First operand 210 states and 259 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:40,697 INFO L93 Difference]: Finished difference Result 547 states and 664 transitions. [2023-12-19 15:29:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 15:29:40,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 121 [2023-12-19 15:29:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:40,699 INFO L225 Difference]: With dead ends: 547 [2023-12-19 15:29:40,699 INFO L226 Difference]: Without dead ends: 338 [2023-12-19 15:29:40,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 15:29:40,700 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 75 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:40,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 508 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:29:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-12-19 15:29:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 332. [2023-12-19 15:29:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 260 states have (on average 1.15) internal successors, (299), 263 states have internal predecessors, (299), 50 states have call successors, (50), 21 states have call predecessors, (50), 21 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2023-12-19 15:29:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 399 transitions. [2023-12-19 15:29:40,729 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 399 transitions. Word has length 121 [2023-12-19 15:29:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:40,731 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 399 transitions. [2023-12-19 15:29:40,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 399 transitions. [2023-12-19 15:29:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 15:29:40,732 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:40,732 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:40,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:40,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-19 15:29:40,937 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:40,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:40,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2131294318, now seen corresponding path program 1 times [2023-12-19 15:29:40,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:40,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859643233] [2023-12-19 15:29:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:40,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:40,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:40,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682184813] [2023-12-19 15:29:40,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:40,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:40,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:40,956 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:40,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 15:29:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:41,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 15:29:41,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:41,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-12-19 15:29:41,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2023-12-19 15:29:41,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-19 15:29:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:41,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:41,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:41,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859643233] [2023-12-19 15:29:41,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:41,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682184813] [2023-12-19 15:29:41,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682184813] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:41,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:41,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:29:41,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731840517] [2023-12-19 15:29:41,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:41,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:29:41,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:41,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:29:41,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:29:41,234 INFO L87 Difference]: Start difference. First operand 332 states and 399 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:41,403 INFO L93 Difference]: Finished difference Result 631 states and 754 transitions. [2023-12-19 15:29:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 15:29:41,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 122 [2023-12-19 15:29:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:41,404 INFO L225 Difference]: With dead ends: 631 [2023-12-19 15:29:41,404 INFO L226 Difference]: Without dead ends: 336 [2023-12-19 15:29:41,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 15:29:41,405 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 57 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:41,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 335 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:29:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-12-19 15:29:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 246. [2023-12-19 15:29:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 202 states have (on average 1.1732673267326732) internal successors, (237), 203 states have internal predecessors, (237), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:29:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 297 transitions. [2023-12-19 15:29:41,422 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 297 transitions. Word has length 122 [2023-12-19 15:29:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:41,422 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 297 transitions. [2023-12-19 15:29:41,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 297 transitions. [2023-12-19 15:29:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-19 15:29:41,423 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:41,423 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:41,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:41,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-19 15:29:41,630 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:41,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:41,630 INFO L85 PathProgramCache]: Analyzing trace with hash -283355207, now seen corresponding path program 1 times [2023-12-19 15:29:41,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:41,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904287963] [2023-12-19 15:29:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:41,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:41,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:41,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74711779] [2023-12-19 15:29:41,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:41,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:41,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:41,648 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:41,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 15:29:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:41,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-19 15:29:41,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:41,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-12-19 15:29:41,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2023-12-19 15:29:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:41,906 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:41,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:41,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904287963] [2023-12-19 15:29:41,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:41,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74711779] [2023-12-19 15:29:41,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74711779] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:41,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:41,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 15:29:41,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094266888] [2023-12-19 15:29:41,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:41,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 15:29:41,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:41,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 15:29:41,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-19 15:29:41,908 INFO L87 Difference]: Start difference. First operand 246 states and 297 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:45,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:45,320 INFO L93 Difference]: Finished difference Result 543 states and 650 transitions. [2023-12-19 15:29:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 15:29:45,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 123 [2023-12-19 15:29:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:45,321 INFO L225 Difference]: With dead ends: 543 [2023-12-19 15:29:45,321 INFO L226 Difference]: Without dead ends: 298 [2023-12-19 15:29:45,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-19 15:29:45,322 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 86 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:45,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 672 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-12-19 15:29:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-12-19 15:29:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2023-12-19 15:29:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 232 states have (on average 1.146551724137931) internal successors, (266), 234 states have internal predecessors, (266), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 350 transitions. [2023-12-19 15:29:45,344 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 350 transitions. Word has length 123 [2023-12-19 15:29:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:45,344 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 350 transitions. [2023-12-19 15:29:45,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 350 transitions. [2023-12-19 15:29:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-19 15:29:45,345 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:45,345 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:45,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:45,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-19 15:29:45,554 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:45,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:45,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1754330119, now seen corresponding path program 1 times [2023-12-19 15:29:45,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:45,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854414847] [2023-12-19 15:29:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:45,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:45,571 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:45,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109773673] [2023-12-19 15:29:45,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:45,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:45,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:45,573 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:45,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 15:29:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:45,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-19 15:29:45,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:45,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2023-12-19 15:29:45,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-19 15:29:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:45,838 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:45,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:45,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854414847] [2023-12-19 15:29:45,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:45,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109773673] [2023-12-19 15:29:45,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109773673] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:45,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:45,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 15:29:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823628530] [2023-12-19 15:29:45,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:45,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 15:29:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:45,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 15:29:45,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-19 15:29:45,840 INFO L87 Difference]: Start difference. First operand 294 states and 350 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:47,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:47,627 INFO L93 Difference]: Finished difference Result 599 states and 708 transitions. [2023-12-19 15:29:47,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 15:29:47,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 123 [2023-12-19 15:29:47,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:47,634 INFO L225 Difference]: With dead ends: 599 [2023-12-19 15:29:47,634 INFO L226 Difference]: Without dead ends: 350 [2023-12-19 15:29:47,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-19 15:29:47,635 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 75 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:47,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 425 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-19 15:29:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-12-19 15:29:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 298. [2023-12-19 15:29:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 235 states have (on average 1.1404255319148937) internal successors, (268), 237 states have internal predecessors, (268), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 352 transitions. [2023-12-19 15:29:47,663 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 352 transitions. Word has length 123 [2023-12-19 15:29:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:47,664 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 352 transitions. [2023-12-19 15:29:47,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 352 transitions. [2023-12-19 15:29:47,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:47,664 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:47,664 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:47,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:47,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-19 15:29:47,867 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:47,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:47,867 INFO L85 PathProgramCache]: Analyzing trace with hash -444392749, now seen corresponding path program 1 times [2023-12-19 15:29:47,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:47,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643030597] [2023-12-19 15:29:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:47,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:47,905 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:47,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502339290] [2023-12-19 15:29:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:47,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:47,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:47,907 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:47,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 15:29:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:48,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 15:29:48,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:48,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-19 15:29:48,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-19 15:29:48,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:29:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:48,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:48,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:48,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643030597] [2023-12-19 15:29:48,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:48,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502339290] [2023-12-19 15:29:48,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502339290] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:48,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:48,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-19 15:29:48,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598239596] [2023-12-19 15:29:48,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:48,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 15:29:48,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:48,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 15:29:48,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-19 15:29:48,157 INFO L87 Difference]: Start difference. First operand 298 states and 352 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:48,397 INFO L93 Difference]: Finished difference Result 856 states and 1014 transitions. [2023-12-19 15:29:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 15:29:48,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:29:48,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:48,399 INFO L225 Difference]: With dead ends: 856 [2023-12-19 15:29:48,399 INFO L226 Difference]: Without dead ends: 559 [2023-12-19 15:29:48,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-12-19 15:29:48,400 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 162 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:48,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 980 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 15:29:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-12-19 15:29:48,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 336. [2023-12-19 15:29:48,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 273 states have (on average 1.1611721611721613) internal successors, (317), 275 states have internal predecessors, (317), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:48,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 401 transitions. [2023-12-19 15:29:48,428 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 401 transitions. Word has length 124 [2023-12-19 15:29:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:48,429 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 401 transitions. [2023-12-19 15:29:48,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:48,429 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 401 transitions. [2023-12-19 15:29:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:48,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:48,430 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:48,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:48,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:48,636 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:48,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1906025948, now seen corresponding path program 1 times [2023-12-19 15:29:48,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:48,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806430037] [2023-12-19 15:29:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:48,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:48,661 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:48,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756865498] [2023-12-19 15:29:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:48,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:48,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:48,662 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:48,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 15:29:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:48,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 15:29:48,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:48,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:29:48,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-19 15:29:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:48,859 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:48,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:48,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806430037] [2023-12-19 15:29:48,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:48,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756865498] [2023-12-19 15:29:48,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756865498] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:48,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:48,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:29:48,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053909087] [2023-12-19 15:29:48,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:48,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:29:48,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:48,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:29:48,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:29:48,860 INFO L87 Difference]: Start difference. First operand 336 states and 401 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:49,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:49,030 INFO L93 Difference]: Finished difference Result 861 states and 1022 transitions. [2023-12-19 15:29:49,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 15:29:49,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:29:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:49,032 INFO L225 Difference]: With dead ends: 861 [2023-12-19 15:29:49,032 INFO L226 Difference]: Without dead ends: 526 [2023-12-19 15:29:49,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 15:29:49,033 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 111 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:49,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 417 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:29:49,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-12-19 15:29:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 300. [2023-12-19 15:29:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 237 states have (on average 1.1434599156118144) internal successors, (271), 239 states have internal predecessors, (271), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 355 transitions. [2023-12-19 15:29:49,061 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 355 transitions. Word has length 124 [2023-12-19 15:29:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:49,062 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 355 transitions. [2023-12-19 15:29:49,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 355 transitions. [2023-12-19 15:29:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:49,062 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:49,062 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:49,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:49,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-19 15:29:49,269 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:49,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:49,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2045136213, now seen corresponding path program 1 times [2023-12-19 15:29:49,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:49,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268883091] [2023-12-19 15:29:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:49,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:49,299 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:49,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180752825] [2023-12-19 15:29:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:49,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:49,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:49,301 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:49,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 15:29:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:49,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 15:29:49,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:49,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-19 15:29:49,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-19 15:29:49,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-12-19 15:29:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:49,583 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:49,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:49,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268883091] [2023-12-19 15:29:49,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:49,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180752825] [2023-12-19 15:29:49,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180752825] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:49,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:49,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 15:29:49,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353851124] [2023-12-19 15:29:49,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:49,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 15:29:49,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:49,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 15:29:49,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:29:49,585 INFO L87 Difference]: Start difference. First operand 300 states and 355 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:49,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:49,846 INFO L93 Difference]: Finished difference Result 856 states and 1014 transitions. [2023-12-19 15:29:49,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 15:29:49,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:29:49,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:49,849 INFO L225 Difference]: With dead ends: 856 [2023-12-19 15:29:49,849 INFO L226 Difference]: Without dead ends: 557 [2023-12-19 15:29:49,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-19 15:29:49,852 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 156 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:49,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 836 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 15:29:49,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-12-19 15:29:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 336. [2023-12-19 15:29:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 273 states have (on average 1.1575091575091576) internal successors, (316), 275 states have internal predecessors, (316), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 400 transitions. [2023-12-19 15:29:49,883 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 400 transitions. Word has length 124 [2023-12-19 15:29:49,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:49,883 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 400 transitions. [2023-12-19 15:29:49,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:49,883 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 400 transitions. [2023-12-19 15:29:49,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:49,884 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:49,885 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:49,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:50,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-19 15:29:50,104 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:50,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:50,105 INFO L85 PathProgramCache]: Analyzing trace with hash 100587614, now seen corresponding path program 1 times [2023-12-19 15:29:50,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:50,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795193907] [2023-12-19 15:29:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:50,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:50,128 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:50,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613523657] [2023-12-19 15:29:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:50,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:50,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:50,145 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:50,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 15:29:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:50,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 15:29:50,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:50,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:29:50,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-19 15:29:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:50,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:50,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:50,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795193907] [2023-12-19 15:29:50,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:50,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613523657] [2023-12-19 15:29:50,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613523657] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:50,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:50,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:29:50,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948146287] [2023-12-19 15:29:50,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:50,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:29:50,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:50,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:29:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:29:50,359 INFO L87 Difference]: Start difference. First operand 336 states and 400 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:50,525 INFO L93 Difference]: Finished difference Result 953 states and 1134 transitions. [2023-12-19 15:29:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 15:29:50,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:29:50,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:50,527 INFO L225 Difference]: With dead ends: 953 [2023-12-19 15:29:50,527 INFO L226 Difference]: Without dead ends: 618 [2023-12-19 15:29:50,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:29:50,528 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 126 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:50,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 477 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:29:50,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-12-19 15:29:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 333. [2023-12-19 15:29:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 270 states have (on average 1.1481481481481481) internal successors, (310), 272 states have internal predecessors, (310), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 394 transitions. [2023-12-19 15:29:50,558 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 394 transitions. Word has length 124 [2023-12-19 15:29:50,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:50,559 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 394 transitions. [2023-12-19 15:29:50,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 394 transitions. [2023-12-19 15:29:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:50,560 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:50,560 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:50,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:50,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 15:29:50,766 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:50,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:50,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1548766505, now seen corresponding path program 1 times [2023-12-19 15:29:50,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:50,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879628183] [2023-12-19 15:29:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:50,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:50,783 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:50,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930143419] [2023-12-19 15:29:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:50,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:50,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:50,785 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:50,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 15:29:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:50,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 15:29:50,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:51,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-19 15:29:51,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:29:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:51,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:51,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:51,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879628183] [2023-12-19 15:29:51,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:51,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930143419] [2023-12-19 15:29:51,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930143419] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:51,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:51,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 15:29:51,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429629849] [2023-12-19 15:29:51,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:51,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 15:29:51,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 15:29:51,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:29:51,022 INFO L87 Difference]: Start difference. First operand 333 states and 394 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:51,218 INFO L93 Difference]: Finished difference Result 876 states and 1030 transitions. [2023-12-19 15:29:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 15:29:51,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:29:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:51,220 INFO L225 Difference]: With dead ends: 876 [2023-12-19 15:29:51,220 INFO L226 Difference]: Without dead ends: 544 [2023-12-19 15:29:51,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-19 15:29:51,222 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 127 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:51,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 691 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:29:51,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2023-12-19 15:29:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 369. [2023-12-19 15:29:51,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 306 states have (on average 1.1503267973856208) internal successors, (352), 308 states have internal predecessors, (352), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 436 transitions. [2023-12-19 15:29:51,251 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 436 transitions. Word has length 124 [2023-12-19 15:29:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:51,252 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 436 transitions. [2023-12-19 15:29:51,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 436 transitions. [2023-12-19 15:29:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:51,253 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:51,253 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:51,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:51,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 15:29:51,459 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:51,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:51,460 INFO L85 PathProgramCache]: Analyzing trace with hash 801652192, now seen corresponding path program 1 times [2023-12-19 15:29:51,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:51,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345796445] [2023-12-19 15:29:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:51,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:51,475 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:51,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534907255] [2023-12-19 15:29:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:51,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:51,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:51,477 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:51,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 15:29:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:51,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 15:29:51,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:51,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:29:51,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-19 15:29:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:51,695 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:51,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:51,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345796445] [2023-12-19 15:29:51,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:51,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534907255] [2023-12-19 15:29:51,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534907255] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:51,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:51,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:29:51,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301819969] [2023-12-19 15:29:51,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:51,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:29:51,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:51,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:29:51,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:29:51,697 INFO L87 Difference]: Start difference. First operand 369 states and 436 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:51,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:51,859 INFO L93 Difference]: Finished difference Result 991 states and 1163 transitions. [2023-12-19 15:29:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 15:29:51,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:29:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:51,861 INFO L225 Difference]: With dead ends: 991 [2023-12-19 15:29:51,861 INFO L226 Difference]: Without dead ends: 623 [2023-12-19 15:29:51,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:29:51,862 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 111 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:51,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 483 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:29:51,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-12-19 15:29:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 375. [2023-12-19 15:29:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 312 states have (on average 1.1570512820512822) internal successors, (361), 314 states have internal predecessors, (361), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 445 transitions. [2023-12-19 15:29:51,892 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 445 transitions. Word has length 124 [2023-12-19 15:29:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:51,892 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 445 transitions. [2023-12-19 15:29:51,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 445 transitions. [2023-12-19 15:29:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:51,893 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:51,893 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:51,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:52,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:52,100 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:52,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:52,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1481710562, now seen corresponding path program 1 times [2023-12-19 15:29:52,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:52,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190015224] [2023-12-19 15:29:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:52,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:52,117 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:52,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338201528] [2023-12-19 15:29:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:52,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:52,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:52,141 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:52,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 15:29:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:52,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-19 15:29:52,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:52,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-12-19 15:29:52,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-12-19 15:29:52,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-19 15:29:52,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:29:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:52,520 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:52,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:52,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190015224] [2023-12-19 15:29:52,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:52,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338201528] [2023-12-19 15:29:52,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338201528] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:52,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:52,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-12-19 15:29:52,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606470859] [2023-12-19 15:29:52,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:52,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 15:29:52,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:52,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 15:29:52,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-12-19 15:29:52,522 INFO L87 Difference]: Start difference. First operand 375 states and 445 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:53,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:53,245 INFO L93 Difference]: Finished difference Result 971 states and 1138 transitions. [2023-12-19 15:29:53,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-19 15:29:53,245 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:29:53,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:53,247 INFO L225 Difference]: With dead ends: 971 [2023-12-19 15:29:53,247 INFO L226 Difference]: Without dead ends: 597 [2023-12-19 15:29:53,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2023-12-19 15:29:53,248 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 308 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:53,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1551 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 15:29:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2023-12-19 15:29:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 381. [2023-12-19 15:29:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 318 states have (on average 1.1540880503144655) internal successors, (367), 320 states have internal predecessors, (367), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 451 transitions. [2023-12-19 15:29:53,283 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 451 transitions. Word has length 124 [2023-12-19 15:29:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:53,283 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 451 transitions. [2023-12-19 15:29:53,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 451 transitions. [2023-12-19 15:29:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:53,284 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:53,284 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:53,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:53,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:53,490 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:53,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:53,491 INFO L85 PathProgramCache]: Analyzing trace with hash 402854794, now seen corresponding path program 1 times [2023-12-19 15:29:53,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:53,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69485950] [2023-12-19 15:29:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:53,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:53,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:53,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750200664] [2023-12-19 15:29:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:53,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:53,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:53,530 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:53,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 15:29:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:53,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 15:29:53,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:53,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:29:53,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-19 15:29:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:53,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:53,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:53,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69485950] [2023-12-19 15:29:53,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:53,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750200664] [2023-12-19 15:29:53,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750200664] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:53,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:53,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:29:53,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734299256] [2023-12-19 15:29:53,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:53,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:29:53,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:29:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:29:53,804 INFO L87 Difference]: Start difference. First operand 381 states and 451 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:53,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:53,979 INFO L93 Difference]: Finished difference Result 994 states and 1174 transitions. [2023-12-19 15:29:53,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 15:29:53,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:29:53,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:53,983 INFO L225 Difference]: With dead ends: 994 [2023-12-19 15:29:53,983 INFO L226 Difference]: Without dead ends: 614 [2023-12-19 15:29:53,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 15:29:53,984 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 108 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:53,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 418 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:29:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2023-12-19 15:29:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 382. [2023-12-19 15:29:54,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 319 states have (on average 1.1536050156739812) internal successors, (368), 321 states have internal predecessors, (368), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 452 transitions. [2023-12-19 15:29:54,016 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 452 transitions. Word has length 124 [2023-12-19 15:29:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:54,016 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 452 transitions. [2023-12-19 15:29:54,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:54,016 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 452 transitions. [2023-12-19 15:29:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:54,017 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:54,017 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:54,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:54,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:54,224 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:54,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1402583540, now seen corresponding path program 1 times [2023-12-19 15:29:54,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:54,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726122497] [2023-12-19 15:29:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:54,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:54,281 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:54,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807233550] [2023-12-19 15:29:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:54,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:54,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:54,282 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:54,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-19 15:29:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:54,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 15:29:54,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:54,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:29:54,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-19 15:29:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:54,556 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:54,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:54,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726122497] [2023-12-19 15:29:54,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:54,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807233550] [2023-12-19 15:29:54,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807233550] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:54,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:54,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:29:54,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713959961] [2023-12-19 15:29:54,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:54,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:29:54,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:54,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:29:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:29:54,558 INFO L87 Difference]: Start difference. First operand 382 states and 452 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:54,755 INFO L93 Difference]: Finished difference Result 1057 states and 1250 transitions. [2023-12-19 15:29:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 15:29:54,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:29:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:54,758 INFO L225 Difference]: With dead ends: 1057 [2023-12-19 15:29:54,758 INFO L226 Difference]: Without dead ends: 676 [2023-12-19 15:29:54,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:29:54,759 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 107 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:54,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 511 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:29:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2023-12-19 15:29:54,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 415. [2023-12-19 15:29:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 352 states have (on average 1.15625) internal successors, (407), 354 states have internal predecessors, (407), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:54,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 491 transitions. [2023-12-19 15:29:54,792 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 491 transitions. Word has length 124 [2023-12-19 15:29:54,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:54,793 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 491 transitions. [2023-12-19 15:29:54,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:54,793 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 491 transitions. [2023-12-19 15:29:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:54,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:54,794 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:54,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:55,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:55,000 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:55,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:55,000 INFO L85 PathProgramCache]: Analyzing trace with hash -701518962, now seen corresponding path program 1 times [2023-12-19 15:29:55,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:55,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838664609] [2023-12-19 15:29:55,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:55,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:55,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:55,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050520899] [2023-12-19 15:29:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:55,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:55,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:55,033 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) [2023-12-19 15:29:55,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-19 15:29:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:55,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 15:29:55,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:55,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:29:55,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-19 15:29:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:55,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:55,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:55,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838664609] [2023-12-19 15:29:55,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:55,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050520899] [2023-12-19 15:29:55,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050520899] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:55,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:55,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:29:55,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946967240] [2023-12-19 15:29:55,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:55,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:29:55,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:55,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:29:55,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:29:55,287 INFO L87 Difference]: Start difference. First operand 415 states and 491 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:55,457 INFO L93 Difference]: Finished difference Result 1083 states and 1273 transitions. [2023-12-19 15:29:55,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 15:29:55,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:29:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:55,459 INFO L225 Difference]: With dead ends: 1083 [2023-12-19 15:29:55,460 INFO L226 Difference]: Without dead ends: 669 [2023-12-19 15:29:55,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:29:55,461 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 111 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:55,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 488 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:29:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2023-12-19 15:29:55,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 421. [2023-12-19 15:29:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 358 states have (on average 1.1620111731843576) internal successors, (416), 360 states have internal predecessors, (416), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 500 transitions. [2023-12-19 15:29:55,495 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 500 transitions. Word has length 124 [2023-12-19 15:29:55,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:55,495 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 500 transitions. [2023-12-19 15:29:55,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 500 transitions. [2023-12-19 15:29:55,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:55,496 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:55,496 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:55,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:55,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:55,703 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:55,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:55,703 INFO L85 PathProgramCache]: Analyzing trace with hash -21460592, now seen corresponding path program 1 times [2023-12-19 15:29:55,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:55,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130307627] [2023-12-19 15:29:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:55,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:55,721 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:55,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872739666] [2023-12-19 15:29:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:55,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:55,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:55,734 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) [2023-12-19 15:29:55,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-19 15:29:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:55,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-19 15:29:55,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:55,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-12-19 15:29:56,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-12-19 15:29:56,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-19 15:29:56,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:29:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:56,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:56,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:56,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130307627] [2023-12-19 15:29:56,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:56,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872739666] [2023-12-19 15:29:56,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872739666] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:56,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:56,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-12-19 15:29:56,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6956228] [2023-12-19 15:29:56,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:56,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 15:29:56,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:56,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 15:29:56,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-12-19 15:29:56,134 INFO L87 Difference]: Start difference. First operand 421 states and 500 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:56,736 INFO L93 Difference]: Finished difference Result 1072 states and 1257 transitions. [2023-12-19 15:29:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-19 15:29:56,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:29:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:56,738 INFO L225 Difference]: With dead ends: 1072 [2023-12-19 15:29:56,738 INFO L226 Difference]: Without dead ends: 652 [2023-12-19 15:29:56,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2023-12-19 15:29:56,739 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 302 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:56,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1571 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 15:29:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2023-12-19 15:29:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 424. [2023-12-19 15:29:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 361 states have (on average 1.1606648199445984) internal successors, (419), 363 states have internal predecessors, (419), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 503 transitions. [2023-12-19 15:29:56,774 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 503 transitions. Word has length 124 [2023-12-19 15:29:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:56,774 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 503 transitions. [2023-12-19 15:29:56,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:56,774 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 503 transitions. [2023-12-19 15:29:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:56,775 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:56,775 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:56,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:56,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:56,981 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:56,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1648899735, now seen corresponding path program 1 times [2023-12-19 15:29:56,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:56,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279038106] [2023-12-19 15:29:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:56,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:56,998 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:56,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174251485] [2023-12-19 15:29:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:56,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:56,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:57,000 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:57,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-19 15:29:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:57,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 15:29:57,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:57,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:29:57,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-19 15:29:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:57,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:57,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:57,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279038106] [2023-12-19 15:29:57,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:57,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174251485] [2023-12-19 15:29:57,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174251485] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:57,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:57,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 15:29:57,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669780911] [2023-12-19 15:29:57,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:57,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 15:29:57,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:57,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 15:29:57,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:29:57,252 INFO L87 Difference]: Start difference. First operand 424 states and 503 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:57,459 INFO L93 Difference]: Finished difference Result 1094 states and 1279 transitions. [2023-12-19 15:29:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 15:29:57,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:29:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:57,462 INFO L225 Difference]: With dead ends: 1094 [2023-12-19 15:29:57,462 INFO L226 Difference]: Without dead ends: 671 [2023-12-19 15:29:57,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-19 15:29:57,464 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 132 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:57,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 734 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:29:57,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2023-12-19 15:29:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 460. [2023-12-19 15:29:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 397 states have (on average 1.1612090680100755) internal successors, (461), 399 states have internal predecessors, (461), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 545 transitions. [2023-12-19 15:29:57,502 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 545 transitions. Word has length 124 [2023-12-19 15:29:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:57,502 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 545 transitions. [2023-12-19 15:29:57,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 545 transitions. [2023-12-19 15:29:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:57,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:57,506 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:57,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-19 15:29:57,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-19 15:29:57,712 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:57,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:57,712 INFO L85 PathProgramCache]: Analyzing trace with hash -584941359, now seen corresponding path program 1 times [2023-12-19 15:29:57,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:57,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742684197] [2023-12-19 15:29:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:57,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:57,727 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:57,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662384053] [2023-12-19 15:29:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:57,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:57,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:57,729 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:57,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-19 15:29:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:57,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 15:29:57,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:57,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-19 15:29:57,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:29:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:29:57,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:29:57,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:29:57,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742684197] [2023-12-19 15:29:57,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:29:57,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662384053] [2023-12-19 15:29:57,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662384053] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:29:57,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:29:57,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 15:29:57,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089860510] [2023-12-19 15:29:57,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:29:57,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 15:29:57,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:29:57,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 15:29:57,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:29:57,998 INFO L87 Difference]: Start difference. First operand 460 states and 545 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:29:58,218 INFO L93 Difference]: Finished difference Result 1184 states and 1398 transitions. [2023-12-19 15:29:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 15:29:58,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:29:58,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:29:58,220 INFO L225 Difference]: With dead ends: 1184 [2023-12-19 15:29:58,220 INFO L226 Difference]: Without dead ends: 725 [2023-12-19 15:29:58,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-19 15:29:58,221 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 152 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:29:58,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 750 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:29:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2023-12-19 15:29:58,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 495. [2023-12-19 15:29:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 432 states have (on average 1.1689814814814814) internal successors, (505), 434 states have internal predecessors, (505), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-19 15:29:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 589 transitions. [2023-12-19 15:29:58,260 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 589 transitions. Word has length 124 [2023-12-19 15:29:58,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:29:58,260 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 589 transitions. [2023-12-19 15:29:58,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:29:58,261 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 589 transitions. [2023-12-19 15:29:58,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:29:58,261 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:29:58,261 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:29:58,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-19 15:29:58,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-19 15:29:58,518 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:29:58,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:29:58,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1765477338, now seen corresponding path program 1 times [2023-12-19 15:29:58,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:29:58,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411503900] [2023-12-19 15:29:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:58,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:29:58,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:29:58,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754746596] [2023-12-19 15:29:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:29:58,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:29:58,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:29:58,535 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:29:58,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-19 15:29:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:29:58,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-19 15:29:58,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:29:59,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-19 15:29:59,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-19 15:29:59,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-19 15:29:59,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-19 15:29:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 28 proven. 304 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-12-19 15:29:59,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 15:29:59,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2023-12-19 15:30:00,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2023-12-19 15:30:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 54 proven. 33 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-12-19 15:30:00,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:30:00,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411503900] [2023-12-19 15:30:00,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:30:00,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754746596] [2023-12-19 15:30:00,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754746596] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 15:30:00,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 15:30:00,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-12-19 15:30:00,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731718796] [2023-12-19 15:30:00,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 15:30:00,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-19 15:30:00,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:30:00,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-19 15:30:00,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-12-19 15:30:00,117 INFO L87 Difference]: Start difference. First operand 495 states and 589 transitions. Second operand has 27 states, 23 states have (on average 3.869565217391304) internal successors, (89), 25 states have internal predecessors, (89), 11 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 8 states have call predecessors, (32), 11 states have call successors, (32) [2023-12-19 15:30:00,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:30:00,763 INFO L93 Difference]: Finished difference Result 948 states and 1113 transitions. [2023-12-19 15:30:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 15:30:00,764 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 3.869565217391304) internal successors, (89), 25 states have internal predecessors, (89), 11 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 8 states have call predecessors, (32), 11 states have call successors, (32) Word has length 124 [2023-12-19 15:30:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:30:00,765 INFO L225 Difference]: With dead ends: 948 [2023-12-19 15:30:00,765 INFO L226 Difference]: Without dead ends: 454 [2023-12-19 15:30:00,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1270, Unknown=0, NotChecked=0, Total=1640 [2023-12-19 15:30:00,766 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 535 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 15:30:00,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 644 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 15:30:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-12-19 15:30:00,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 380. [2023-12-19 15:30:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 332 states have (on average 1.1566265060240963) internal successors, (384), 333 states have internal predecessors, (384), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:30:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 444 transitions. [2023-12-19 15:30:00,818 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 444 transitions. Word has length 124 [2023-12-19 15:30:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:30:00,818 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 444 transitions. [2023-12-19 15:30:00,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 3.869565217391304) internal successors, (89), 25 states have internal predecessors, (89), 11 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 8 states have call predecessors, (32), 11 states have call successors, (32) [2023-12-19 15:30:00,818 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 444 transitions. [2023-12-19 15:30:00,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:30:00,819 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:30:00,819 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:30:00,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-19 15:30:01,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-19 15:30:01,021 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:30:01,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:30:01,022 INFO L85 PathProgramCache]: Analyzing trace with hash 262306184, now seen corresponding path program 1 times [2023-12-19 15:30:01,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:30:01,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810183431] [2023-12-19 15:30:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:01,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:30:01,064 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:30:01,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974129795] [2023-12-19 15:30:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:01,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:01,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:30:01,069 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:30:01,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-19 15:30:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:30:01,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-19 15:30:01,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:30:01,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-12-19 15:30:01,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-12-19 15:30:01,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-19 15:30:01,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:30:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:30:01,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:30:01,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:30:01,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810183431] [2023-12-19 15:30:01,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:30:01,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974129795] [2023-12-19 15:30:01,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974129795] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:30:01,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:30:01,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-12-19 15:30:01,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677007909] [2023-12-19 15:30:01,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:30:01,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 15:30:01,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:30:01,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 15:30:01,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-12-19 15:30:01,443 INFO L87 Difference]: Start difference. First operand 380 states and 444 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:30:02,094 INFO L93 Difference]: Finished difference Result 972 states and 1126 transitions. [2023-12-19 15:30:02,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-19 15:30:02,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:30:02,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:30:02,109 INFO L225 Difference]: With dead ends: 972 [2023-12-19 15:30:02,109 INFO L226 Difference]: Without dead ends: 593 [2023-12-19 15:30:02,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2023-12-19 15:30:02,110 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 319 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 15:30:02,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 1773 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 15:30:02,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2023-12-19 15:30:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 380. [2023-12-19 15:30:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 332 states have (on average 1.1566265060240963) internal successors, (384), 333 states have internal predecessors, (384), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:30:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 444 transitions. [2023-12-19 15:30:02,146 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 444 transitions. Word has length 124 [2023-12-19 15:30:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:30:02,146 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 444 transitions. [2023-12-19 15:30:02,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 444 transitions. [2023-12-19 15:30:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:30:02,147 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:30:02,147 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:30:02,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-19 15:30:02,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-19 15:30:02,353 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:30:02,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:30:02,354 INFO L85 PathProgramCache]: Analyzing trace with hash 942364554, now seen corresponding path program 1 times [2023-12-19 15:30:02,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:30:02,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216886403] [2023-12-19 15:30:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:02,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:30:02,368 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:30:02,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968129834] [2023-12-19 15:30:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:02,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:02,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:30:02,369 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:30:02,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-19 15:30:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:30:02,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 15:30:02,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:30:02,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-19 15:30:02,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-19 15:30:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:30:02,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:30:02,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:30:02,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216886403] [2023-12-19 15:30:02,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:30:02,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968129834] [2023-12-19 15:30:02,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968129834] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:30:02,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:30:02,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:30:02,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786419029] [2023-12-19 15:30:02,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:30:02,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:30:02,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:30:02,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:30:02,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:30:02,621 INFO L87 Difference]: Start difference. First operand 380 states and 444 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:02,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:30:02,841 INFO L93 Difference]: Finished difference Result 926 states and 1071 transitions. [2023-12-19 15:30:02,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 15:30:02,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:30:02,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:30:02,845 INFO L225 Difference]: With dead ends: 926 [2023-12-19 15:30:02,845 INFO L226 Difference]: Without dead ends: 547 [2023-12-19 15:30:02,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:30:02,846 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 92 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:30:02,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 574 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:30:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-12-19 15:30:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 377. [2023-12-19 15:30:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 329 states have (on average 1.148936170212766) internal successors, (378), 330 states have internal predecessors, (378), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:30:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 438 transitions. [2023-12-19 15:30:02,932 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 438 transitions. Word has length 124 [2023-12-19 15:30:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:30:02,932 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 438 transitions. [2023-12-19 15:30:02,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 438 transitions. [2023-12-19 15:30:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:30:02,933 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:30:02,933 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:30:02,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-19 15:30:03,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-19 15:30:03,134 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:30:03,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:30:03,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1682242415, now seen corresponding path program 1 times [2023-12-19 15:30:03,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:30:03,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556275161] [2023-12-19 15:30:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:03,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:30:03,149 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:30:03,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343909681] [2023-12-19 15:30:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:03,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:03,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:30:03,162 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:30:03,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-19 15:30:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:30:03,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 15:30:03,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:30:03,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:30:03,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-19 15:30:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:30:03,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:30:03,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:30:03,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556275161] [2023-12-19 15:30:03,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:30:03,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343909681] [2023-12-19 15:30:03,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343909681] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:30:03,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:30:03,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 15:30:03,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5413770] [2023-12-19 15:30:03,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:30:03,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 15:30:03,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:30:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 15:30:03,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:30:03,438 INFO L87 Difference]: Start difference. First operand 377 states and 438 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:30:03,632 INFO L93 Difference]: Finished difference Result 927 states and 1064 transitions. [2023-12-19 15:30:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 15:30:03,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:30:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:30:03,634 INFO L225 Difference]: With dead ends: 927 [2023-12-19 15:30:03,634 INFO L226 Difference]: Without dead ends: 551 [2023-12-19 15:30:03,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-19 15:30:03,635 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 142 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:30:03,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 820 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:30:03,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-12-19 15:30:03,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 380. [2023-12-19 15:30:03,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 332 states have (on average 1.1475903614457832) internal successors, (381), 333 states have internal predecessors, (381), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:30:03,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 441 transitions. [2023-12-19 15:30:03,672 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 441 transitions. Word has length 124 [2023-12-19 15:30:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:30:03,672 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 441 transitions. [2023-12-19 15:30:03,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 441 transitions. [2023-12-19 15:30:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:30:03,673 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:30:03,673 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:30:03,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-19 15:30:03,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:03,880 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:30:03,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:30:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash -981177837, now seen corresponding path program 1 times [2023-12-19 15:30:03,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:30:03,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782783230] [2023-12-19 15:30:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:03,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:30:03,895 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:30:03,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661088503] [2023-12-19 15:30:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:03,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:03,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:30:03,918 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:30:03,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-19 15:30:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:30:04,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 15:30:04,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:30:04,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-19 15:30:04,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-19 15:30:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:30:04,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:30:04,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:30:04,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782783230] [2023-12-19 15:30:04,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:30:04,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661088503] [2023-12-19 15:30:04,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661088503] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:30:04,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:30:04,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:30:04,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261264316] [2023-12-19 15:30:04,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:30:04,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:30:04,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:30:04,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:30:04,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:30:04,178 INFO L87 Difference]: Start difference. First operand 380 states and 441 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:04,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:30:04,351 INFO L93 Difference]: Finished difference Result 906 states and 1035 transitions. [2023-12-19 15:30:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 15:30:04,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:30:04,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:30:04,353 INFO L225 Difference]: With dead ends: 906 [2023-12-19 15:30:04,353 INFO L226 Difference]: Without dead ends: 527 [2023-12-19 15:30:04,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:30:04,354 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 89 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:30:04,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 578 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:30:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2023-12-19 15:30:04,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 377. [2023-12-19 15:30:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 329 states have (on average 1.1306990881458967) internal successors, (372), 330 states have internal predecessors, (372), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:30:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 432 transitions. [2023-12-19 15:30:04,414 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 432 transitions. Word has length 124 [2023-12-19 15:30:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:30:04,414 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 432 transitions. [2023-12-19 15:30:04,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 432 transitions. [2023-12-19 15:30:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:30:04,415 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:30:04,415 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:30:04,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-19 15:30:04,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:04,621 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:30:04,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:30:04,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1508351125, now seen corresponding path program 1 times [2023-12-19 15:30:04,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:30:04,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513026397] [2023-12-19 15:30:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:04,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:30:04,637 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:30:04,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720505150] [2023-12-19 15:30:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:04,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:04,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:30:04,638 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:30:04,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-19 15:30:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:30:04,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 15:30:04,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:30:04,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:30:04,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-19 15:30:04,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-12-19 15:30:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:30:04,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:30:04,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:30:04,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513026397] [2023-12-19 15:30:04,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:30:04,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720505150] [2023-12-19 15:30:04,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720505150] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:30:04,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:30:04,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-19 15:30:04,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734225381] [2023-12-19 15:30:04,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:30:04,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 15:30:04,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:30:04,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 15:30:04,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-19 15:30:04,910 INFO L87 Difference]: Start difference. First operand 377 states and 432 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:30:05,169 INFO L93 Difference]: Finished difference Result 927 states and 1049 transitions. [2023-12-19 15:30:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 15:30:05,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:30:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:30:05,171 INFO L225 Difference]: With dead ends: 927 [2023-12-19 15:30:05,171 INFO L226 Difference]: Without dead ends: 551 [2023-12-19 15:30:05,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-19 15:30:05,173 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 139 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 15:30:05,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 806 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 15:30:05,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-12-19 15:30:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 377. [2023-12-19 15:30:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 329 states have (on average 1.121580547112462) internal successors, (369), 330 states have internal predecessors, (369), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:30:05,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 429 transitions. [2023-12-19 15:30:05,227 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 429 transitions. Word has length 124 [2023-12-19 15:30:05,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:30:05,227 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 429 transitions. [2023-12-19 15:30:05,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 429 transitions. [2023-12-19 15:30:05,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 15:30:05,228 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:30:05,228 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:30:05,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-19 15:30:05,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:05,435 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:30:05,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:30:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2106557801, now seen corresponding path program 1 times [2023-12-19 15:30:05,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:30:05,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344398316] [2023-12-19 15:30:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:05,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:30:05,449 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:30:05,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756310760] [2023-12-19 15:30:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:05,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:05,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:30:05,450 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:30:05,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-19 15:30:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:30:05,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 15:30:05,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:30:05,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-19 15:30:05,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-19 15:30:05,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-19 15:30:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:30:05,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:30:05,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:30:05,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344398316] [2023-12-19 15:30:05,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:30:05,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756310760] [2023-12-19 15:30:05,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756310760] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:30:05,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:30:05,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 15:30:05,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350271403] [2023-12-19 15:30:05,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:30:05,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 15:30:05,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:30:05,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 15:30:05,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:30:05,754 INFO L87 Difference]: Start difference. First operand 377 states and 429 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:05,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:30:05,977 INFO L93 Difference]: Finished difference Result 892 states and 1003 transitions. [2023-12-19 15:30:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 15:30:05,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-12-19 15:30:05,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:30:05,990 INFO L225 Difference]: With dead ends: 892 [2023-12-19 15:30:05,990 INFO L226 Difference]: Without dead ends: 516 [2023-12-19 15:30:05,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-19 15:30:05,991 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 116 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:30:05,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 731 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:30:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2023-12-19 15:30:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 321. [2023-12-19 15:30:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 273 states have (on average 1.098901098901099) internal successors, (300), 274 states have internal predecessors, (300), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:30:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 360 transitions. [2023-12-19 15:30:06,038 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 360 transitions. Word has length 124 [2023-12-19 15:30:06,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:30:06,039 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 360 transitions. [2023-12-19 15:30:06,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 360 transitions. [2023-12-19 15:30:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-19 15:30:06,039 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:30:06,039 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:30:06,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-19 15:30:06,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-19 15:30:06,244 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:30:06,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:30:06,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1698448772, now seen corresponding path program 1 times [2023-12-19 15:30:06,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:30:06,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500837124] [2023-12-19 15:30:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:06,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:30:06,275 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:30:06,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323838765] [2023-12-19 15:30:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:06,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:06,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:30:06,277 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:30:06,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-19 15:30:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:30:06,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-19 15:30:06,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:30:06,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 22 [2023-12-19 15:30:06,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 35 [2023-12-19 15:30:06,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-12-19 15:30:06,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2023-12-19 15:30:06,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2023-12-19 15:30:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:30:06,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:30:06,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:30:06,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500837124] [2023-12-19 15:30:06,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:30:06,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323838765] [2023-12-19 15:30:06,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323838765] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:30:06,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:30:06,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-12-19 15:30:06,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480273666] [2023-12-19 15:30:06,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:30:06,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 15:30:06,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:30:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 15:30:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2023-12-19 15:30:06,779 INFO L87 Difference]: Start difference. First operand 321 states and 360 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:30:07,602 INFO L93 Difference]: Finished difference Result 455 states and 504 transitions. [2023-12-19 15:30:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-19 15:30:07,603 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 127 [2023-12-19 15:30:07,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:30:07,604 INFO L225 Difference]: With dead ends: 455 [2023-12-19 15:30:07,604 INFO L226 Difference]: Without dead ends: 453 [2023-12-19 15:30:07,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-12-19 15:30:07,605 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 159 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 15:30:07,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1230 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 15:30:07,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-12-19 15:30:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 384. [2023-12-19 15:30:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 336 states have (on average 1.0952380952380953) internal successors, (368), 337 states have internal predecessors, (368), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:30:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 428 transitions. [2023-12-19 15:30:07,666 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 428 transitions. Word has length 127 [2023-12-19 15:30:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:30:07,666 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 428 transitions. [2023-12-19 15:30:07,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 428 transitions. [2023-12-19 15:30:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-19 15:30:07,667 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:30:07,667 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:30:07,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-19 15:30:07,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:07,867 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:30:07,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:30:07,868 INFO L85 PathProgramCache]: Analyzing trace with hash 889102146, now seen corresponding path program 1 times [2023-12-19 15:30:07,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:30:07,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765930123] [2023-12-19 15:30:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:07,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:30:07,881 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:30:07,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443901225] [2023-12-19 15:30:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:07,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:07,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:30:07,882 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:30:07,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-19 15:30:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:30:08,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 15:30:08,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:30:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:30:08,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:30:08,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:30:08,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765930123] [2023-12-19 15:30:08,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:30:08,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443901225] [2023-12-19 15:30:08,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443901225] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:30:08,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:30:08,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:30:08,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040201087] [2023-12-19 15:30:08,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:30:08,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:30:08,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:30:08,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:30:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:30:08,131 INFO L87 Difference]: Start difference. First operand 384 states and 428 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:08,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:30:08,249 INFO L93 Difference]: Finished difference Result 787 states and 878 transitions. [2023-12-19 15:30:08,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 15:30:08,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 127 [2023-12-19 15:30:08,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:30:08,251 INFO L225 Difference]: With dead ends: 787 [2023-12-19 15:30:08,251 INFO L226 Difference]: Without dead ends: 404 [2023-12-19 15:30:08,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 15:30:08,251 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 43 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:30:08,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 464 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:30:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-12-19 15:30:08,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 378. [2023-12-19 15:30:08,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 330 states have (on average 1.0909090909090908) internal successors, (360), 331 states have internal predecessors, (360), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:30:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 420 transitions. [2023-12-19 15:30:08,296 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 420 transitions. Word has length 127 [2023-12-19 15:30:08,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:30:08,296 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 420 transitions. [2023-12-19 15:30:08,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:08,296 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 420 transitions. [2023-12-19 15:30:08,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-19 15:30:08,297 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:30:08,297 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:30:08,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-19 15:30:08,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-19 15:30:08,504 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:30:08,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:30:08,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1564435266, now seen corresponding path program 1 times [2023-12-19 15:30:08,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:30:08,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192649357] [2023-12-19 15:30:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:30:08,520 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:30:08,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53241748] [2023-12-19 15:30:08,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:08,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:08,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:30:08,521 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:30:08,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-19 15:30:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:30:08,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 15:30:08,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:30:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-19 15:30:08,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 15:30:08,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:30:08,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192649357] [2023-12-19 15:30:08,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:30:08,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53241748] [2023-12-19 15:30:08,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53241748] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 15:30:08,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 15:30:08,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 15:30:08,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166223064] [2023-12-19 15:30:08,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 15:30:08,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 15:30:08,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:30:08,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 15:30:08,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 15:30:08,767 INFO L87 Difference]: Start difference. First operand 378 states and 420 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:08,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:30:08,864 INFO L93 Difference]: Finished difference Result 755 states and 839 transitions. [2023-12-19 15:30:08,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 15:30:08,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 127 [2023-12-19 15:30:08,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:30:08,866 INFO L225 Difference]: With dead ends: 755 [2023-12-19 15:30:08,866 INFO L226 Difference]: Without dead ends: 378 [2023-12-19 15:30:08,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-19 15:30:08,867 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 50 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 15:30:08,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 528 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 15:30:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-12-19 15:30:08,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2023-12-19 15:30:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 330 states have (on average 1.087878787878788) internal successors, (359), 331 states have internal predecessors, (359), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 15:30:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 419 transitions. [2023-12-19 15:30:08,911 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 419 transitions. Word has length 127 [2023-12-19 15:30:08,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:30:08,911 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 419 transitions. [2023-12-19 15:30:08,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-19 15:30:08,911 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 419 transitions. [2023-12-19 15:30:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-19 15:30:08,912 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 15:30:08,912 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 15:30:08,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-19 15:30:09,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:09,118 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 15:30:09,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 15:30:09,118 INFO L85 PathProgramCache]: Analyzing trace with hash 755088640, now seen corresponding path program 1 times [2023-12-19 15:30:09,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 15:30:09,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95345934] [2023-12-19 15:30:09,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:09,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 15:30:09,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 15:30:09,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119905792] [2023-12-19 15:30:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 15:30:09,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 15:30:09,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 15:30:09,133 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 15:30:09,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-19 15:30:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 15:30:09,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 15:30:09,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 15:30:09,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-19 15:30:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 9 proven. 267 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-12-19 15:30:09,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 15:30:09,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2023-12-19 15:30:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-12-19 15:30:09,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 15:30:09,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95345934] [2023-12-19 15:30:09,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 15:30:09,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119905792] [2023-12-19 15:30:09,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119905792] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 15:30:09,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 15:30:09,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-12-19 15:30:09,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662472364] [2023-12-19 15:30:09,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 15:30:09,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 15:30:09,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 15:30:09,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 15:30:09,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-12-19 15:30:09,833 INFO L87 Difference]: Start difference. First operand 378 states and 419 transitions. Second operand has 14 states, 12 states have (on average 7.083333333333333) internal successors, (85), 13 states have internal predecessors, (85), 6 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (32), 4 states have call predecessors, (32), 6 states have call successors, (32) [2023-12-19 15:30:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 15:30:10,060 INFO L93 Difference]: Finished difference Result 641 states and 713 transitions. [2023-12-19 15:30:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 15:30:10,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 7.083333333333333) internal successors, (85), 13 states have internal predecessors, (85), 6 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (32), 4 states have call predecessors, (32), 6 states have call successors, (32) Word has length 127 [2023-12-19 15:30:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 15:30:10,061 INFO L225 Difference]: With dead ends: 641 [2023-12-19 15:30:10,061 INFO L226 Difference]: Without dead ends: 0 [2023-12-19 15:30:10,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2023-12-19 15:30:10,062 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 128 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 15:30:10,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 349 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 15:30:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-19 15:30:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-19 15:30:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 15:30:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-19 15:30:10,063 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 127 [2023-12-19 15:30:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 15:30:10,063 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-19 15:30:10,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 7.083333333333333) internal successors, (85), 13 states have internal predecessors, (85), 6 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (32), 4 states have call predecessors, (32), 6 states have call successors, (32) [2023-12-19 15:30:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-19 15:30:10,063 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-19 15:30:10,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 15:30:10,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-12-19 15:30:10,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-19 15:30:10,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. Received shutdown request... [2023-12-19 15:44:01,155 WARN L619 AbstractCegarLoop]: Verification canceled: while PolyPacSimplificationTermWalker was simplifying a ∧-5-9-9-15-14-15-14-15-14-15-14-15-14-15-14-15-14-14-14-13-14-12-14-11-14-10-14-9-14-8-14-7-14-6-14-5-14-4-14-3-14-2-14-2-13-1 term,while PolyPacSimplificationTermWalker was simplifying 10 xjuncts wrt. a ∧-56-10-15-14-15-14-15-14-15-14-15-14-15-14-15-14-14-14-13-14-12-14-11-14-10-14-9-14-8-14-7-14-6-14-5-14-4-14-3-14-2-14-2-11-1 context. [2023-12-19 15:44:01,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-19 15:44:01,157 INFO L257 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2023-12-19 15:44:01,158 INFO L158 Benchmark]: Toolchain (without parser) took 878355.76ms. Allocated memory was 255.9MB in the beginning and 709.9MB in the end (delta: 454.0MB). Free memory was 200.9MB in the beginning and 357.8MB in the end (delta: -156.9MB). Peak memory consumption was 298.1MB. Max. memory is 8.0GB. [2023-12-19 15:44:01,160 INFO L158 Benchmark]: CDTParser took 0.46ms. Allocated memory is still 204.5MB. Free memory is still 153.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 15:44:01,160 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.68ms. Allocated memory is still 255.9MB. Free memory was 200.6MB in the beginning and 186.2MB in the end (delta: 14.4MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-19 15:44:01,160 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.94ms. Allocated memory is still 255.9MB. Free memory was 186.0MB in the beginning and 182.1MB in the end (delta: 3.9MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-19 15:44:01,161 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 15:44:01,166 INFO L158 Benchmark]: Boogie Preprocessor took 58.78ms. Allocated memory is still 255.9MB. Free memory was 182.1MB in the beginning and 177.6MB in the end (delta: 4.5MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2023-12-19 15:44:01,166 INFO L158 Benchmark]: RCFGBuilder took 624.16ms. Allocated memory is still 255.9MB. Free memory was 177.3MB in the beginning and 190.7MB in the end (delta: -13.4MB). Peak memory consumption was 14.3MB. Max. memory is 8.0GB. [2023-12-19 15:44:01,166 INFO L158 Benchmark]: TraceAbstraction took 877399.73ms. Allocated memory was 255.9MB in the beginning and 709.9MB in the end (delta: 454.0MB). Free memory was 189.7MB in the beginning and 357.8MB in the end (delta: -168.1MB). Peak memory consumption was 285.9MB. Max. memory is 8.0GB. [2023-12-19 15:44:01,169 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46ms. Allocated memory is still 204.5MB. Free memory is still 153.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 205.68ms. Allocated memory is still 255.9MB. Free memory was 200.6MB in the beginning and 186.2MB in the end (delta: 14.4MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 61.94ms. Allocated memory is still 255.9MB. Free memory was 186.0MB in the beginning and 182.1MB in the end (delta: 3.9MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 58.78ms. Allocated memory is still 255.9MB. Free memory was 182.1MB in the beginning and 177.6MB in the end (delta: 4.5MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * RCFGBuilder took 624.16ms. Allocated memory is still 255.9MB. Free memory was 177.3MB in the beginning and 190.7MB in the end (delta: -13.4MB). Peak memory consumption was 14.3MB. Max. memory is 8.0GB. * TraceAbstraction took 877399.73ms. Allocated memory was 255.9MB in the beginning and 709.9MB in the end (delta: 454.0MB). Free memory was 189.7MB in the beginning and 357.8MB in the end (delta: -168.1MB). Peak memory consumption was 285.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while PolyPacSimplificationTermWalker was simplifying a ∧-5-2-20-2-10-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-22-20-2-10-1 context. RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown