/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:45:44,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:45:44,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:45:44,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:45:44,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:45:44,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:45:44,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:45:45,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:45:45,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:45:45,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:45:45,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:45:45,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:45:45,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:45:45,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:45:45,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:45:45,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:45:45,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:45:45,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:45:45,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:45:45,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:45:45,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:45:45,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:45:45,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:45:45,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:45:45,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:45:45,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:45:45,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:45:45,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:45:45,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:45:45,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:45:45,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:45:45,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:45:45,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:45:45,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:45:45,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:45:45,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:45:45,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:45:45,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:45:45,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:45:45,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:45:45,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:45:45,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:45:45,080 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:45:45,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:45:45,081 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:45:45,081 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:45:45,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:45:45,082 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:45:45,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:45:45,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:45:45,083 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:45:45,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:45:45,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:45:45,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:45:45,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:45:45,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:45:45,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:45:45,084 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:45:45,084 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:45:45,084 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:45:45,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:45:45,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:45:45,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:45:45,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:45:45,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:45:45,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:45:45,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:45:45,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:45:45,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:45:45,087 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:45:45,087 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:45:45,087 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:45:45,087 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:45:45,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:45:45,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:45:45,087 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:45:45,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:45:45,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:45:45,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:45:45,307 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:45:45,308 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:45:45,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2022-01-10 06:45:45,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d917eba9b/db9036318af94051bf9ce7cb1df76ad4/FLAG3e94a811d [2022-01-10 06:45:45,748 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:45:45,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2022-01-10 06:45:45,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d917eba9b/db9036318af94051bf9ce7cb1df76ad4/FLAG3e94a811d [2022-01-10 06:45:45,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d917eba9b/db9036318af94051bf9ce7cb1df76ad4 [2022-01-10 06:45:45,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:45:45,776 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:45:45,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:45:45,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:45:45,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:45:45,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:45:45" (1/1) ... [2022-01-10 06:45:45,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@328994fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:45, skipping insertion in model container [2022-01-10 06:45:45,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:45:45" (1/1) ... [2022-01-10 06:45:45,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:45:45,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:45:46,035 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2022-01-10 06:45:46,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:45:46,046 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:45:46,119 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2022-01-10 06:45:46,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:45:46,135 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:45:46,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:46 WrapperNode [2022-01-10 06:45:46,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:45:46,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:45:46,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:45:46,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:45:46,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:46" (1/1) ... [2022-01-10 06:45:46,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:46" (1/1) ... [2022-01-10 06:45:46,189 INFO L137 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 517 [2022-01-10 06:45:46,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:45:46,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:45:46,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:45:46,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:45:46,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:46" (1/1) ... [2022-01-10 06:45:46,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:46" (1/1) ... [2022-01-10 06:45:46,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:46" (1/1) ... [2022-01-10 06:45:46,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:46" (1/1) ... [2022-01-10 06:45:46,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:46" (1/1) ... [2022-01-10 06:45:46,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:46" (1/1) ... [2022-01-10 06:45:46,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:46" (1/1) ... [2022-01-10 06:45:46,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:45:46,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:45:46,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:45:46,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:45:46,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:46" (1/1) ... [2022-01-10 06:45:46,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:45:46,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:45:46,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:45:46,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:45:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-01-10 06:45:46,302 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-01-10 06:45:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:45:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:45:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-01-10 06:45:46,302 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-01-10 06:45:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-01-10 06:45:46,302 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-01-10 06:45:46,303 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2022-01-10 06:45:46,303 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2022-01-10 06:45:46,303 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 06:45:46,303 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 06:45:46,303 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-01-10 06:45:46,303 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-01-10 06:45:46,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:45:46,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:45:46,304 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-01-10 06:45:46,304 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-01-10 06:45:46,396 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:45:46,398 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:45:46,859 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:45:46,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:45:46,868 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:45:46,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:45:46 BoogieIcfgContainer [2022-01-10 06:45:46,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:45:46,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:45:46,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:45:46,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:45:46,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:45:45" (1/3) ... [2022-01-10 06:45:46,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f61663a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:45:46, skipping insertion in model container [2022-01-10 06:45:46,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:46" (2/3) ... [2022-01-10 06:45:46,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f61663a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:45:46, skipping insertion in model container [2022-01-10 06:45:46,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:45:46" (3/3) ... [2022-01-10 06:45:46,877 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2022-01-10 06:45:46,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:45:46,882 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:45:46,924 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:45:46,929 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:45:46,929 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:45:46,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 167 states have (on average 1.5508982035928143) internal successors, (259), 168 states have internal predecessors, (259), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-10 06:45:46,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 06:45:46,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:46,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:46,954 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:46,958 INFO L85 PathProgramCache]: Analyzing trace with hash -518679476, now seen corresponding path program 1 times [2022-01-10 06:45:46,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:46,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098723782] [2022-01-10 06:45:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:46,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:46,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:46,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:46,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:45:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:47,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:45:47,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:45:47,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:47,191 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:47,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098723782] [2022-01-10 06:45:47,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098723782] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:47,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:47,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:45:47,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492190105] [2022-01-10 06:45:47,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:47,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:45:47,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:47,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:45:47,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:45:47,224 INFO L87 Difference]: Start difference. First operand has 207 states, 167 states have (on average 1.5508982035928143) internal successors, (259), 168 states have internal predecessors, (259), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:45:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:47,270 INFO L93 Difference]: Finished difference Result 398 states and 642 transitions. [2022-01-10 06:45:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:45:47,273 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-10 06:45:47,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:47,282 INFO L225 Difference]: With dead ends: 398 [2022-01-10 06:45:47,282 INFO L226 Difference]: Without dead ends: 203 [2022-01-10 06:45:47,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:45:47,289 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:47,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:47,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-10 06:45:47,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-01-10 06:45:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 164 states have (on average 1.5) internal successors, (246), 164 states have internal predecessors, (246), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-10 06:45:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 308 transitions. [2022-01-10 06:45:47,356 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 308 transitions. Word has length 44 [2022-01-10 06:45:47,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:47,356 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 308 transitions. [2022-01-10 06:45:47,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:45:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 308 transitions. [2022-01-10 06:45:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 06:45:47,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:47,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:47,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:47,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:47,575 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:47,576 INFO L85 PathProgramCache]: Analyzing trace with hash -527444980, now seen corresponding path program 1 times [2022-01-10 06:45:47,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:47,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354160918] [2022-01-10 06:45:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:47,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:47,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:47,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:47,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:45:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:47,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:45:47,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:45:47,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:47,787 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:47,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354160918] [2022-01-10 06:45:47,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354160918] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:47,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:47,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:45:47,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569476709] [2022-01-10 06:45:47,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:47,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:45:47,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:47,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:45:47,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:45:47,790 INFO L87 Difference]: Start difference. First operand 203 states and 308 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:45:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:47,905 INFO L93 Difference]: Finished difference Result 531 states and 811 transitions. [2022-01-10 06:45:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:45:47,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-10 06:45:47,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:47,909 INFO L225 Difference]: With dead ends: 531 [2022-01-10 06:45:47,909 INFO L226 Difference]: Without dead ends: 342 [2022-01-10 06:45:47,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:47,912 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 171 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:47,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1586 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:45:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-10 06:45:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 203. [2022-01-10 06:45:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 164 states have (on average 1.4268292682926829) internal successors, (234), 164 states have internal predecessors, (234), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-10 06:45:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 296 transitions. [2022-01-10 06:45:47,938 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 296 transitions. Word has length 44 [2022-01-10 06:45:47,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:47,938 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 296 transitions. [2022-01-10 06:45:47,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:45:47,938 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 296 transitions. [2022-01-10 06:45:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 06:45:47,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:47,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:47,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:48,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:48,151 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:48,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:48,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1202945359, now seen corresponding path program 1 times [2022-01-10 06:45:48,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:48,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355826377] [2022-01-10 06:45:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:48,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:48,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:48,154 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:48,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:45:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:48,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:48,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:45:48,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:48,370 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:48,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355826377] [2022-01-10 06:45:48,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355826377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:48,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:48,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:48,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255640748] [2022-01-10 06:45:48,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:48,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:48,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:48,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:48,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:48,375 INFO L87 Difference]: Start difference. First operand 203 states and 296 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:45:48,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:48,420 INFO L93 Difference]: Finished difference Result 395 states and 585 transitions. [2022-01-10 06:45:48,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:48,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-10 06:45:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:48,425 INFO L225 Difference]: With dead ends: 395 [2022-01-10 06:45:48,425 INFO L226 Difference]: Without dead ends: 209 [2022-01-10 06:45:48,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:48,429 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 6 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:48,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 860 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:48,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-10 06:45:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2022-01-10 06:45:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 167 states have (on average 1.4191616766467066) internal successors, (237), 167 states have internal predecessors, (237), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-10 06:45:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 299 transitions. [2022-01-10 06:45:48,463 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 299 transitions. Word has length 55 [2022-01-10 06:45:48,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:48,464 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 299 transitions. [2022-01-10 06:45:48,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:45:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 299 transitions. [2022-01-10 06:45:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:45:48,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:48,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:48,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:48,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:48,681 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:48,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:48,681 INFO L85 PathProgramCache]: Analyzing trace with hash -915994749, now seen corresponding path program 1 times [2022-01-10 06:45:48,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:48,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981727775] [2022-01-10 06:45:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:48,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:48,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:48,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:48,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:45:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:48,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:45:48,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:45:49,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:49,015 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:49,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981727775] [2022-01-10 06:45:49,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981727775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:49,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:49,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:49,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586155326] [2022-01-10 06:45:49,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:49,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:45:49,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:49,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:45:49,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:49,019 INFO L87 Difference]: Start difference. First operand 207 states and 299 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:49,314 INFO L93 Difference]: Finished difference Result 596 states and 882 transitions. [2022-01-10 06:45:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:45:49,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2022-01-10 06:45:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:49,318 INFO L225 Difference]: With dead ends: 596 [2022-01-10 06:45:49,318 INFO L226 Difference]: Without dead ends: 406 [2022-01-10 06:45:49,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:49,319 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 776 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:49,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 778 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:45:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-01-10 06:45:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 275. [2022-01-10 06:45:49,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 230 states have (on average 1.4086956521739131) internal successors, (324), 230 states have internal predecessors, (324), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-10 06:45:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 392 transitions. [2022-01-10 06:45:49,334 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 392 transitions. Word has length 71 [2022-01-10 06:45:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:49,335 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 392 transitions. [2022-01-10 06:45:49,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:49,335 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 392 transitions. [2022-01-10 06:45:49,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 06:45:49,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:49,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:49,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:49,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:49,546 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:49,546 INFO L85 PathProgramCache]: Analyzing trace with hash 862574350, now seen corresponding path program 1 times [2022-01-10 06:45:49,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:49,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387025426] [2022-01-10 06:45:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:49,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:49,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:49,549 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:49,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:45:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:45:49,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:45:49,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:49,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:49,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387025426] [2022-01-10 06:45:49,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387025426] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:49,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:49,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:49,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99096302] [2022-01-10 06:45:49,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:49,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:45:49,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:49,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:45:49,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:49,817 INFO L87 Difference]: Start difference. First operand 275 states and 392 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:50,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:50,079 INFO L93 Difference]: Finished difference Result 597 states and 881 transitions. [2022-01-10 06:45:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:45:50,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2022-01-10 06:45:50,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:50,082 INFO L225 Difference]: With dead ends: 597 [2022-01-10 06:45:50,082 INFO L226 Difference]: Without dead ends: 407 [2022-01-10 06:45:50,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:50,084 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 773 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:50,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 780 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:45:50,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-10 06:45:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 276. [2022-01-10 06:45:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 231 states have (on average 1.4025974025974026) internal successors, (324), 231 states have internal predecessors, (324), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-10 06:45:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 392 transitions. [2022-01-10 06:45:50,103 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 392 transitions. Word has length 72 [2022-01-10 06:45:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:50,104 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 392 transitions. [2022-01-10 06:45:50,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:50,104 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 392 transitions. [2022-01-10 06:45:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:45:50,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:50,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:50,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:50,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:50,314 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:50,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:50,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1695978741, now seen corresponding path program 1 times [2022-01-10 06:45:50,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:50,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480282195] [2022-01-10 06:45:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:50,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:50,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:50,317 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:50,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:45:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:50,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:45:50,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:45:50,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:50,541 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480282195] [2022-01-10 06:45:50,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480282195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:50,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:50,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:45:50,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90552605] [2022-01-10 06:45:50,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:50,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:45:50,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:50,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:45:50,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:45:50,543 INFO L87 Difference]: Start difference. First operand 276 states and 392 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:50,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:50,568 INFO L93 Difference]: Finished difference Result 673 states and 970 transitions. [2022-01-10 06:45:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:45:50,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75 [2022-01-10 06:45:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:50,571 INFO L225 Difference]: With dead ends: 673 [2022-01-10 06:45:50,572 INFO L226 Difference]: Without dead ends: 483 [2022-01-10 06:45:50,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:45:50,573 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 219 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:50,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 622 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:50,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-10 06:45:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 473. [2022-01-10 06:45:50,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 387 states have (on average 1.4134366925064599) internal successors, (547), 388 states have internal predecessors, (547), 65 states have call successors, (65), 20 states have call predecessors, (65), 20 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2022-01-10 06:45:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 677 transitions. [2022-01-10 06:45:50,596 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 677 transitions. Word has length 75 [2022-01-10 06:45:50,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:50,596 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 677 transitions. [2022-01-10 06:45:50,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 677 transitions. [2022-01-10 06:45:50,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:45:50,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:50,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:50,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:50,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:50,807 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1123713881, now seen corresponding path program 1 times [2022-01-10 06:45:50,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:50,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218059583] [2022-01-10 06:45:50,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:50,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:50,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:50,810 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:50,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:45:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:50,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:45:50,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:45:51,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:51,011 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:51,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218059583] [2022-01-10 06:45:51,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218059583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:51,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:51,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:45:51,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973197367] [2022-01-10 06:45:51,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:51,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:45:51,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:51,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:45:51,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:45:51,013 INFO L87 Difference]: Start difference. First operand 473 states and 677 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:51,072 INFO L93 Difference]: Finished difference Result 1142 states and 1660 transitions. [2022-01-10 06:45:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:45:51,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 76 [2022-01-10 06:45:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:51,077 INFO L225 Difference]: With dead ends: 1142 [2022-01-10 06:45:51,077 INFO L226 Difference]: Without dead ends: 795 [2022-01-10 06:45:51,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:45:51,079 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 227 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:51,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 657 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:51,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-10 06:45:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 778. [2022-01-10 06:45:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 616 states have (on average 1.4237012987012987) internal successors, (877), 619 states have internal predecessors, (877), 124 states have call successors, (124), 37 states have call predecessors, (124), 37 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2022-01-10 06:45:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1125 transitions. [2022-01-10 06:45:51,117 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1125 transitions. Word has length 76 [2022-01-10 06:45:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:51,118 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1125 transitions. [2022-01-10 06:45:51,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:51,118 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1125 transitions. [2022-01-10 06:45:51,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:45:51,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:51,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:51,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:51,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:51,328 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:51,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:51,329 INFO L85 PathProgramCache]: Analyzing trace with hash -156149797, now seen corresponding path program 1 times [2022-01-10 06:45:51,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:51,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497479020] [2022-01-10 06:45:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:51,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:51,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:51,332 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:51,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:45:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:51,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:45:51,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:45:51,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:51,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:51,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497479020] [2022-01-10 06:45:51,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497479020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:51,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:51,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:45:51,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451528420] [2022-01-10 06:45:51,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:51,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:45:51,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:51,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:45:51,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:51,543 INFO L87 Difference]: Start difference. First operand 778 states and 1125 transitions. Second operand has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 06:45:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:51,587 INFO L93 Difference]: Finished difference Result 1299 states and 1897 transitions. [2022-01-10 06:45:51,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:51,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 76 [2022-01-10 06:45:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:51,591 INFO L225 Difference]: With dead ends: 1299 [2022-01-10 06:45:51,591 INFO L226 Difference]: Without dead ends: 624 [2022-01-10 06:45:51,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:45:51,593 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 2 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1160 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 [2022-01-10 06:45:51,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1160 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-10 06:45:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2022-01-10 06:45:51,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 499 states have (on average 1.4248496993987976) internal successors, (711), 501 states have internal predecessors, (711), 95 states have call successors, (95), 29 states have call predecessors, (95), 29 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:45:51,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 901 transitions. [2022-01-10 06:45:51,620 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 901 transitions. Word has length 76 [2022-01-10 06:45:51,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:51,620 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 901 transitions. [2022-01-10 06:45:51,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 06:45:51,621 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 901 transitions. [2022-01-10 06:45:51,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:45:51,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:51,621 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:51,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:51,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:51,831 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:51,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1447667936, now seen corresponding path program 1 times [2022-01-10 06:45:51,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:51,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294156922] [2022-01-10 06:45:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:51,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:51,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:51,832 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:51,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:45:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:51,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:51,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:45:52,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:52,032 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:52,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294156922] [2022-01-10 06:45:52,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294156922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:52,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:52,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:52,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959413335] [2022-01-10 06:45:52,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:52,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:52,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:52,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:52,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:52,034 INFO L87 Difference]: Start difference. First operand 624 states and 901 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 06:45:52,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:52,077 INFO L93 Difference]: Finished difference Result 1137 states and 1662 transitions. [2022-01-10 06:45:52,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:52,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 76 [2022-01-10 06:45:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:52,081 INFO L225 Difference]: With dead ends: 1137 [2022-01-10 06:45:52,081 INFO L226 Difference]: Without dead ends: 645 [2022-01-10 06:45:52,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:52,083 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 7 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:52,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 873 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-10 06:45:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 639. [2022-01-10 06:45:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 511 states have (on average 1.4148727984344422) internal successors, (723), 513 states have internal predecessors, (723), 95 states have call successors, (95), 32 states have call predecessors, (95), 32 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:45:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 913 transitions. [2022-01-10 06:45:52,115 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 913 transitions. Word has length 76 [2022-01-10 06:45:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:52,115 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 913 transitions. [2022-01-10 06:45:52,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 06:45:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 913 transitions. [2022-01-10 06:45:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:45:52,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:52,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:52,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:52,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:52,326 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:52,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:52,326 INFO L85 PathProgramCache]: Analyzing trace with hash 424195238, now seen corresponding path program 1 times [2022-01-10 06:45:52,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:52,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117052016] [2022-01-10 06:45:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:52,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:52,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:52,328 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:52,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:45:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:52,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:45:52,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:52,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:52,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117052016] [2022-01-10 06:45:52,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117052016] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:52,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:52,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:52,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330234162] [2022-01-10 06:45:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:52,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:52,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:52,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:52,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:52,543 INFO L87 Difference]: Start difference. First operand 639 states and 913 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:45:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:52,613 INFO L93 Difference]: Finished difference Result 1167 states and 1701 transitions. [2022-01-10 06:45:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:52,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 84 [2022-01-10 06:45:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:52,617 INFO L225 Difference]: With dead ends: 1167 [2022-01-10 06:45:52,617 INFO L226 Difference]: Without dead ends: 660 [2022-01-10 06:45:52,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:52,619 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 7 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:52,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 865 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-01-10 06:45:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 654. [2022-01-10 06:45:52,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 523 states have (on average 1.4053537284894837) internal successors, (735), 525 states have internal predecessors, (735), 95 states have call successors, (95), 35 states have call predecessors, (95), 35 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:45:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 925 transitions. [2022-01-10 06:45:52,647 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 925 transitions. Word has length 84 [2022-01-10 06:45:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:52,648 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 925 transitions. [2022-01-10 06:45:52,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:45:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 925 transitions. [2022-01-10 06:45:52,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 06:45:52,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:52,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:52,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:52,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:52,859 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:52,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:52,859 INFO L85 PathProgramCache]: Analyzing trace with hash 369914576, now seen corresponding path program 1 times [2022-01-10 06:45:52,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:52,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423364967] [2022-01-10 06:45:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:52,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:52,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:52,862 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:52,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:45:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:52,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:52,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:45:53,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:53,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:53,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423364967] [2022-01-10 06:45:53,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423364967] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:53,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:53,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:53,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669350308] [2022-01-10 06:45:53,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:53,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:53,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:53,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:53,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:53,107 INFO L87 Difference]: Start difference. First operand 654 states and 925 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 06:45:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:53,145 INFO L93 Difference]: Finished difference Result 1194 states and 1707 transitions. [2022-01-10 06:45:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:53,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 92 [2022-01-10 06:45:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:53,149 INFO L225 Difference]: With dead ends: 1194 [2022-01-10 06:45:53,149 INFO L226 Difference]: Without dead ends: 672 [2022-01-10 06:45:53,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:53,151 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 6 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:53,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 865 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:53,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-01-10 06:45:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 666. [2022-01-10 06:45:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 532 states have (on average 1.3984962406015038) internal successors, (744), 534 states have internal predecessors, (744), 95 states have call successors, (95), 38 states have call predecessors, (95), 38 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:45:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 934 transitions. [2022-01-10 06:45:53,172 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 934 transitions. Word has length 92 [2022-01-10 06:45:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:53,173 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 934 transitions. [2022-01-10 06:45:53,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 06:45:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 934 transitions. [2022-01-10 06:45:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 06:45:53,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:53,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:53,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:53,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:53,383 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:53,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1528593417, now seen corresponding path program 1 times [2022-01-10 06:45:53,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:53,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527868615] [2022-01-10 06:45:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:53,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:53,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:53,386 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:53,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:45:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:53,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:45:53,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:45:53,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:45:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:45:53,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:53,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527868615] [2022-01-10 06:45:53,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527868615] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:45:53,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:45:53,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2022-01-10 06:45:53,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462597695] [2022-01-10 06:45:53,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:53,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:45:53,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:45:53,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:53,896 INFO L87 Difference]: Start difference. First operand 666 states and 934 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:45:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:54,173 INFO L93 Difference]: Finished difference Result 1898 states and 2730 transitions. [2022-01-10 06:45:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:45:54,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 92 [2022-01-10 06:45:54,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:54,180 INFO L225 Difference]: With dead ends: 1898 [2022-01-10 06:45:54,180 INFO L226 Difference]: Without dead ends: 1364 [2022-01-10 06:45:54,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:45:54,183 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 456 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:54,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 2212 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:45:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2022-01-10 06:45:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 943. [2022-01-10 06:45:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 734 states have (on average 1.393732970027248) internal successors, (1023), 738 states have internal predecessors, (1023), 149 states have call successors, (149), 59 states have call predecessors, (149), 59 states have return successors, (149), 145 states have call predecessors, (149), 149 states have call successors, (149) [2022-01-10 06:45:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1321 transitions. [2022-01-10 06:45:54,250 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1321 transitions. Word has length 92 [2022-01-10 06:45:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:54,250 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 1321 transitions. [2022-01-10 06:45:54,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:45:54,250 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1321 transitions. [2022-01-10 06:45:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 06:45:54,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:54,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:54,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:54,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:54,461 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:54,461 INFO L85 PathProgramCache]: Analyzing trace with hash 491862460, now seen corresponding path program 1 times [2022-01-10 06:45:54,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:54,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671257536] [2022-01-10 06:45:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:54,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:54,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:54,463 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:54,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:45:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:54,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:54,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:45:54,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:54,688 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:54,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671257536] [2022-01-10 06:45:54,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671257536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:54,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:54,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:54,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636721784] [2022-01-10 06:45:54,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:54,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:54,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:54,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:54,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:54,689 INFO L87 Difference]: Start difference. First operand 943 states and 1321 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:45:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:54,745 INFO L93 Difference]: Finished difference Result 1732 states and 2478 transitions. [2022-01-10 06:45:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:54,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 99 [2022-01-10 06:45:54,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:54,750 INFO L225 Difference]: With dead ends: 1732 [2022-01-10 06:45:54,750 INFO L226 Difference]: Without dead ends: 978 [2022-01-10 06:45:54,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:54,754 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 7 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:54,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 865 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:54,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-01-10 06:45:54,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 968. [2022-01-10 06:45:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 754 states have (on average 1.3832891246684351) internal successors, (1043), 758 states have internal predecessors, (1043), 149 states have call successors, (149), 64 states have call predecessors, (149), 64 states have return successors, (149), 145 states have call predecessors, (149), 149 states have call successors, (149) [2022-01-10 06:45:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1341 transitions. [2022-01-10 06:45:54,791 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1341 transitions. Word has length 99 [2022-01-10 06:45:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:54,791 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1341 transitions. [2022-01-10 06:45:54,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:45:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1341 transitions. [2022-01-10 06:45:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 06:45:54,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:54,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:54,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:55,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:55,005 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:55,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1199462, now seen corresponding path program 1 times [2022-01-10 06:45:55,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:55,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165195484] [2022-01-10 06:45:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:55,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:55,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:55,008 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:55,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:45:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:55,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:55,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:45:55,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:55,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:55,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165195484] [2022-01-10 06:45:55,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165195484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:55,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:55,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:55,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034655213] [2022-01-10 06:45:55,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:55,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:55,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:55,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:55,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:55,270 INFO L87 Difference]: Start difference. First operand 968 states and 1341 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 06:45:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:55,318 INFO L93 Difference]: Finished difference Result 1771 states and 2478 transitions. [2022-01-10 06:45:55,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:55,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 107 [2022-01-10 06:45:55,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:55,324 INFO L225 Difference]: With dead ends: 1771 [2022-01-10 06:45:55,324 INFO L226 Difference]: Without dead ends: 998 [2022-01-10 06:45:55,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:55,326 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 6 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:55,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 865 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-01-10 06:45:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 988. [2022-01-10 06:45:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 769 states have (on average 1.3758127438231469) internal successors, (1058), 773 states have internal predecessors, (1058), 149 states have call successors, (149), 69 states have call predecessors, (149), 69 states have return successors, (149), 145 states have call predecessors, (149), 149 states have call successors, (149) [2022-01-10 06:45:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1356 transitions. [2022-01-10 06:45:55,366 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1356 transitions. Word has length 107 [2022-01-10 06:45:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:55,367 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 1356 transitions. [2022-01-10 06:45:55,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 06:45:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1356 transitions. [2022-01-10 06:45:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-10 06:45:55,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:55,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:55,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:55,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:55,577 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:55,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:55,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1013166041, now seen corresponding path program 1 times [2022-01-10 06:45:55,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:55,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602725731] [2022-01-10 06:45:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:55,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:55,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:55,580 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:55,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:45:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:55,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:45:55,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:45:55,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:45:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:45:56,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:56,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602725731] [2022-01-10 06:45:56,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602725731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:45:56,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:45:56,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-01-10 06:45:56,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846002588] [2022-01-10 06:45:56,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:45:56,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:45:56,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:56,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:45:56,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:56,126 INFO L87 Difference]: Start difference. First operand 988 states and 1356 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 7 states have internal predecessors, (104), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 06:45:56,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:56,409 INFO L93 Difference]: Finished difference Result 2066 states and 2906 transitions. [2022-01-10 06:45:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:45:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 7 states have internal predecessors, (104), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 108 [2022-01-10 06:45:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:56,415 INFO L225 Difference]: With dead ends: 2066 [2022-01-10 06:45:56,415 INFO L226 Difference]: Without dead ends: 1289 [2022-01-10 06:45:56,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:45:56,417 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 448 mSDsluCounter, 2503 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:56,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 2995 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:45:56,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-01-10 06:45:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 988. [2022-01-10 06:45:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 769 states have (on average 1.3732119635890767) internal successors, (1056), 773 states have internal predecessors, (1056), 149 states have call successors, (149), 69 states have call predecessors, (149), 69 states have return successors, (149), 145 states have call predecessors, (149), 149 states have call successors, (149) [2022-01-10 06:45:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1354 transitions. [2022-01-10 06:45:56,456 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1354 transitions. Word has length 108 [2022-01-10 06:45:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:56,457 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 1354 transitions. [2022-01-10 06:45:56,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 7 states have internal predecessors, (104), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 06:45:56,457 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1354 transitions. [2022-01-10 06:45:56,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 06:45:56,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:56,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:56,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:56,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:56,668 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:56,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:56,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1941201166, now seen corresponding path program 1 times [2022-01-10 06:45:56,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:56,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710595458] [2022-01-10 06:45:56,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:56,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:56,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:56,670 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:56,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:45:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:56,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:45:56,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:45:56,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:56,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:56,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710595458] [2022-01-10 06:45:56,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710595458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:56,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:56,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:45:56,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075635495] [2022-01-10 06:45:56,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:56,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:45:56,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:56,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:45:56,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:45:56,959 INFO L87 Difference]: Start difference. First operand 988 states and 1354 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:57,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:57,465 INFO L93 Difference]: Finished difference Result 2065 states and 2923 transitions. [2022-01-10 06:45:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:45:57,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 112 [2022-01-10 06:45:57,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:57,471 INFO L225 Difference]: With dead ends: 2065 [2022-01-10 06:45:57,471 INFO L226 Difference]: Without dead ends: 1390 [2022-01-10 06:45:57,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:45:57,473 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 749 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 2438 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:57,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 2438 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:45:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2022-01-10 06:45:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 981. [2022-01-10 06:45:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 761 states have (on average 1.3600525624178712) internal successors, (1035), 765 states have internal predecessors, (1035), 149 states have call successors, (149), 70 states have call predecessors, (149), 70 states have return successors, (149), 145 states have call predecessors, (149), 149 states have call successors, (149) [2022-01-10 06:45:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1333 transitions. [2022-01-10 06:45:57,514 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1333 transitions. Word has length 112 [2022-01-10 06:45:57,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:57,514 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1333 transitions. [2022-01-10 06:45:57,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1333 transitions. [2022-01-10 06:45:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 06:45:57,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:57,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:57,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:57,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:57,725 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:57,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:57,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1855933458, now seen corresponding path program 1 times [2022-01-10 06:45:57,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:57,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211646455] [2022-01-10 06:45:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:57,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:57,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:57,727 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:57,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:45:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:57,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:45:57,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:45:58,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:58,027 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:58,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211646455] [2022-01-10 06:45:58,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211646455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:58,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:58,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:45:58,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867662014] [2022-01-10 06:45:58,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:58,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:45:58,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:58,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:45:58,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:45:58,029 INFO L87 Difference]: Start difference. First operand 981 states and 1333 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:45:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:58,486 INFO L93 Difference]: Finished difference Result 2166 states and 3048 transitions. [2022-01-10 06:45:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:45:58,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 113 [2022-01-10 06:45:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:58,494 INFO L225 Difference]: With dead ends: 2166 [2022-01-10 06:45:58,494 INFO L226 Difference]: Without dead ends: 1491 [2022-01-10 06:45:58,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:45:58,497 INFO L933 BasicCegarLoop]: 666 mSDtfsCounter, 655 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 2714 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:58,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 2714 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:45:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2022-01-10 06:45:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1096. [2022-01-10 06:45:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 841 states have (on average 1.3483947681331747) internal successors, (1134), 846 states have internal predecessors, (1134), 172 states have call successors, (172), 82 states have call predecessors, (172), 82 states have return successors, (172), 167 states have call predecessors, (172), 172 states have call successors, (172) [2022-01-10 06:45:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1478 transitions. [2022-01-10 06:45:58,568 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1478 transitions. Word has length 113 [2022-01-10 06:45:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:58,568 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 1478 transitions. [2022-01-10 06:45:58,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:45:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1478 transitions. [2022-01-10 06:45:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 06:45:58,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:58,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:58,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:58,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:58,780 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:58,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:58,780 INFO L85 PathProgramCache]: Analyzing trace with hash 465086573, now seen corresponding path program 1 times [2022-01-10 06:45:58,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:58,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225274897] [2022-01-10 06:45:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:58,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:58,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:58,782 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:58,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:45:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:58,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:58,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:45:59,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:59,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:59,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225274897] [2022-01-10 06:45:59,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225274897] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:59,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:59,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:59,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520447464] [2022-01-10 06:45:59,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:59,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:59,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:59,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:59,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:59,051 INFO L87 Difference]: Start difference. First operand 1096 states and 1478 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:59,266 INFO L93 Difference]: Finished difference Result 2962 states and 4074 transitions. [2022-01-10 06:45:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:59,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 113 [2022-01-10 06:45:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:59,277 INFO L225 Difference]: With dead ends: 2962 [2022-01-10 06:45:59,277 INFO L226 Difference]: Without dead ends: 2294 [2022-01-10 06:45:59,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:59,279 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 418 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:59,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 1060 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:45:59,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2022-01-10 06:45:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2033. [2022-01-10 06:45:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 1537 states have (on average 1.3396226415094339) internal successors, (2059), 1548 states have internal predecessors, (2059), 337 states have call successors, (337), 158 states have call predecessors, (337), 158 states have return successors, (337), 326 states have call predecessors, (337), 337 states have call successors, (337) [2022-01-10 06:45:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 2733 transitions. [2022-01-10 06:45:59,425 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 2733 transitions. Word has length 113 [2022-01-10 06:45:59,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:59,426 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 2733 transitions. [2022-01-10 06:45:59,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 2733 transitions. [2022-01-10 06:45:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:45:59,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:59,428 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:59,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:59,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:45:59,637 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:59,638 INFO L85 PathProgramCache]: Analyzing trace with hash 619186071, now seen corresponding path program 1 times [2022-01-10 06:45:59,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:59,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202101017] [2022-01-10 06:45:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:59,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:59,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:59,640 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:45:59,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:45:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:59,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:45:59,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:45:59,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:59,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:59,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202101017] [2022-01-10 06:45:59,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202101017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:59,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:59,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:45:59,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241109738] [2022-01-10 06:45:59,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:59,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:45:59,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:59,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:45:59,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:45:59,933 INFO L87 Difference]: Start difference. First operand 2033 states and 2733 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:46:00,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:00,371 INFO L93 Difference]: Finished difference Result 4057 states and 5575 transitions. [2022-01-10 06:46:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:46:00,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 115 [2022-01-10 06:46:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:00,382 INFO L225 Difference]: With dead ends: 4057 [2022-01-10 06:46:00,382 INFO L226 Difference]: Without dead ends: 2352 [2022-01-10 06:46:00,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:46:00,387 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 729 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:00,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 2129 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:46:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2022-01-10 06:46:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1851. [2022-01-10 06:46:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1408 states have (on average 1.3352272727272727) internal successors, (1880), 1418 states have internal predecessors, (1880), 300 states have call successors, (300), 142 states have call predecessors, (300), 142 states have return successors, (300), 290 states have call predecessors, (300), 300 states have call successors, (300) [2022-01-10 06:46:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 2480 transitions. [2022-01-10 06:46:00,529 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 2480 transitions. Word has length 115 [2022-01-10 06:46:00,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:00,529 INFO L470 AbstractCegarLoop]: Abstraction has 1851 states and 2480 transitions. [2022-01-10 06:46:00,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:46:00,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 2480 transitions. [2022-01-10 06:46:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-10 06:46:00,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:00,531 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:00,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:00,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:00,740 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:00,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1265431021, now seen corresponding path program 1 times [2022-01-10 06:46:00,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:00,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921911451] [2022-01-10 06:46:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:00,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:00,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:00,742 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:00,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:46:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:00,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:46:00,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:46:01,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 06:46:01,284 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:01,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921911451] [2022-01-10 06:46:01,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921911451] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:01,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:46:01,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2022-01-10 06:46:01,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473473036] [2022-01-10 06:46:01,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:01,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:46:01,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:01,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:46:01,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:46:01,285 INFO L87 Difference]: Start difference. First operand 1851 states and 2480 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:46:01,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:01,540 INFO L93 Difference]: Finished difference Result 3655 states and 4974 transitions. [2022-01-10 06:46:01,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:46:01,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2022-01-10 06:46:01,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:01,550 INFO L225 Difference]: With dead ends: 3655 [2022-01-10 06:46:01,551 INFO L226 Difference]: Without dead ends: 2322 [2022-01-10 06:46:01,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:46:01,554 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 359 mSDsluCounter, 2265 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 2797 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:01,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 2797 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-01-10 06:46:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1851. [2022-01-10 06:46:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1408 states have (on average 1.3316761363636365) internal successors, (1875), 1418 states have internal predecessors, (1875), 300 states have call successors, (300), 142 states have call predecessors, (300), 142 states have return successors, (300), 290 states have call predecessors, (300), 300 states have call successors, (300) [2022-01-10 06:46:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 2475 transitions. [2022-01-10 06:46:01,678 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 2475 transitions. Word has length 116 [2022-01-10 06:46:01,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:01,679 INFO L470 AbstractCegarLoop]: Abstraction has 1851 states and 2475 transitions. [2022-01-10 06:46:01,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:46:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 2475 transitions. [2022-01-10 06:46:01,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:46:01,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:01,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:01,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:01,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:01,890 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:01,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:01,890 INFO L85 PathProgramCache]: Analyzing trace with hash 985009634, now seen corresponding path program 1 times [2022-01-10 06:46:01,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:01,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439877065] [2022-01-10 06:46:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:01,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:01,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:01,892 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:01,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:46:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:01,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:01,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:46:02,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:02,157 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:02,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439877065] [2022-01-10 06:46:02,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439877065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:02,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:02,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:02,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420847640] [2022-01-10 06:46:02,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:02,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:02,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:02,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:02,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:02,158 INFO L87 Difference]: Start difference. First operand 1851 states and 2475 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:46:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:02,372 INFO L93 Difference]: Finished difference Result 4416 states and 5985 transitions. [2022-01-10 06:46:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:02,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2022-01-10 06:46:02,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:02,385 INFO L225 Difference]: With dead ends: 4416 [2022-01-10 06:46:02,385 INFO L226 Difference]: Without dead ends: 3144 [2022-01-10 06:46:02,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:02,389 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 465 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:02,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 1254 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:02,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2022-01-10 06:46:02,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 2780. [2022-01-10 06:46:02,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 2098 states have (on average 1.3250714966634891) internal successors, (2780), 2114 states have internal predecessors, (2780), 464 states have call successors, (464), 217 states have call predecessors, (464), 217 states have return successors, (464), 448 states have call predecessors, (464), 464 states have call successors, (464) [2022-01-10 06:46:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 3708 transitions. [2022-01-10 06:46:02,563 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 3708 transitions. Word has length 115 [2022-01-10 06:46:02,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:02,564 INFO L470 AbstractCegarLoop]: Abstraction has 2780 states and 3708 transitions. [2022-01-10 06:46:02,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:46:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 3708 transitions. [2022-01-10 06:46:02,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:46:02,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:02,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:02,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:02,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:02,776 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1237817774, now seen corresponding path program 1 times [2022-01-10 06:46:02,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:02,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912019606] [2022-01-10 06:46:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:02,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:02,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:02,778 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:02,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:46:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:02,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:46:02,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:46:03,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:03,034 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:03,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912019606] [2022-01-10 06:46:03,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912019606] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:03,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:03,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:03,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517581246] [2022-01-10 06:46:03,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:03,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:03,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:03,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:03,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:03,035 INFO L87 Difference]: Start difference. First operand 2780 states and 3708 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:46:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:03,344 INFO L93 Difference]: Finished difference Result 4746 states and 6344 transitions. [2022-01-10 06:46:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:46:03,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2022-01-10 06:46:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:03,355 INFO L225 Difference]: With dead ends: 4746 [2022-01-10 06:46:03,356 INFO L226 Difference]: Without dead ends: 2319 [2022-01-10 06:46:03,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:46:03,362 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 769 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:03,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 860 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:46:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2022-01-10 06:46:03,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2295. [2022-01-10 06:46:03,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 1734 states have (on average 1.3252595155709344) internal successors, (2298), 1747 states have internal predecessors, (2298), 378 states have call successors, (378), 182 states have call predecessors, (378), 182 states have return successors, (378), 365 states have call predecessors, (378), 378 states have call successors, (378) [2022-01-10 06:46:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3054 transitions. [2022-01-10 06:46:03,503 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3054 transitions. Word has length 115 [2022-01-10 06:46:03,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:03,503 INFO L470 AbstractCegarLoop]: Abstraction has 2295 states and 3054 transitions. [2022-01-10 06:46:03,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:46:03,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3054 transitions. [2022-01-10 06:46:03,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-10 06:46:03,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:03,505 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:03,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:03,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:03,714 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:03,715 INFO L85 PathProgramCache]: Analyzing trace with hash -163928716, now seen corresponding path program 1 times [2022-01-10 06:46:03,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:03,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396106212] [2022-01-10 06:46:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:03,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:03,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:03,716 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:03,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:46:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:03,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:46:03,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:46:04,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:46:04,228 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:04,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396106212] [2022-01-10 06:46:04,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396106212] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:04,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:46:04,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2022-01-10 06:46:04,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078366373] [2022-01-10 06:46:04,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:04,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:46:04,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:04,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:46:04,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:46:04,230 INFO L87 Difference]: Start difference. First operand 2295 states and 3054 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:46:04,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:04,490 INFO L93 Difference]: Finished difference Result 4916 states and 6706 transitions. [2022-01-10 06:46:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:46:04,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 119 [2022-01-10 06:46:04,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:04,501 INFO L225 Difference]: With dead ends: 4916 [2022-01-10 06:46:04,502 INFO L226 Difference]: Without dead ends: 2944 [2022-01-10 06:46:04,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:46:04,506 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 338 mSDsluCounter, 2125 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:04,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 2612 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:04,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2022-01-10 06:46:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2101. [2022-01-10 06:46:04,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 1592 states have (on average 1.3241206030150754) internal successors, (2108), 1604 states have internal predecessors, (2108), 340 states have call successors, (340), 168 states have call predecessors, (340), 168 states have return successors, (340), 328 states have call predecessors, (340), 340 states have call successors, (340) [2022-01-10 06:46:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 2788 transitions. [2022-01-10 06:46:04,647 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 2788 transitions. Word has length 119 [2022-01-10 06:46:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:04,647 INFO L470 AbstractCegarLoop]: Abstraction has 2101 states and 2788 transitions. [2022-01-10 06:46:04,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:46:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 2788 transitions. [2022-01-10 06:46:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-10 06:46:04,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:04,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:04,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-01-10 06:46:04,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:04,858 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:04,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:04,859 INFO L85 PathProgramCache]: Analyzing trace with hash 183157843, now seen corresponding path program 1 times [2022-01-10 06:46:04,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:04,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401747543] [2022-01-10 06:46:04,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:04,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:04,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:04,860 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:04,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:46:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:04,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:46:04,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:46:05,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:05,173 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:05,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401747543] [2022-01-10 06:46:05,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401747543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:05,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:05,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:05,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141478666] [2022-01-10 06:46:05,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:05,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:05,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:05,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:05,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:05,175 INFO L87 Difference]: Start difference. First operand 2101 states and 2788 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:46:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:05,419 INFO L93 Difference]: Finished difference Result 3931 states and 5249 transitions. [2022-01-10 06:46:05,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:46:05,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 118 [2022-01-10 06:46:05,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:05,426 INFO L225 Difference]: With dead ends: 3931 [2022-01-10 06:46:05,426 INFO L226 Difference]: Without dead ends: 2026 [2022-01-10 06:46:05,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:46:05,430 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 728 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:05,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 756 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:46:05,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2022-01-10 06:46:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1902. [2022-01-10 06:46:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1435 states have (on average 1.318466898954704) internal successors, (1892), 1446 states have internal predecessors, (1892), 311 states have call successors, (311), 155 states have call predecessors, (311), 155 states have return successors, (311), 300 states have call predecessors, (311), 311 states have call successors, (311) [2022-01-10 06:46:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2514 transitions. [2022-01-10 06:46:05,541 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2514 transitions. Word has length 118 [2022-01-10 06:46:05,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:05,541 INFO L470 AbstractCegarLoop]: Abstraction has 1902 states and 2514 transitions. [2022-01-10 06:46:05,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:46:05,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2514 transitions. [2022-01-10 06:46:05,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 06:46:05,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:05,543 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:05,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:05,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:05,752 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash 898072227, now seen corresponding path program 1 times [2022-01-10 06:46:05,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:05,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812376033] [2022-01-10 06:46:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:05,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:05,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:05,753 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:05,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:46:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:05,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:05,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:46:06,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:06,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:06,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812376033] [2022-01-10 06:46:06,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812376033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:06,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:06,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:06,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536473103] [2022-01-10 06:46:06,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:06,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:06,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:06,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:06,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:06,009 INFO L87 Difference]: Start difference. First operand 1902 states and 2514 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-01-10 06:46:06,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:06,103 INFO L93 Difference]: Finished difference Result 3638 states and 4849 transitions. [2022-01-10 06:46:06,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:06,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 124 [2022-01-10 06:46:06,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:06,109 INFO L225 Difference]: With dead ends: 3638 [2022-01-10 06:46:06,109 INFO L226 Difference]: Without dead ends: 1998 [2022-01-10 06:46:06,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:06,113 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 8 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:06,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 870 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:06,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-01-10 06:46:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1974. [2022-01-10 06:46:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1495 states have (on average 1.305685618729097) internal successors, (1952), 1506 states have internal predecessors, (1952), 311 states have call successors, (311), 167 states have call predecessors, (311), 167 states have return successors, (311), 300 states have call predecessors, (311), 311 states have call successors, (311) [2022-01-10 06:46:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2574 transitions. [2022-01-10 06:46:06,224 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2574 transitions. Word has length 124 [2022-01-10 06:46:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:06,224 INFO L470 AbstractCegarLoop]: Abstraction has 1974 states and 2574 transitions. [2022-01-10 06:46:06,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-01-10 06:46:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2574 transitions. [2022-01-10 06:46:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-10 06:46:06,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:06,230 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:06,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:06,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:06,439 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:06,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:06,439 INFO L85 PathProgramCache]: Analyzing trace with hash 699183706, now seen corresponding path program 1 times [2022-01-10 06:46:06,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:06,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400611126] [2022-01-10 06:46:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:06,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:06,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:06,441 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:06,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:46:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:06,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:46:06,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 06:46:06,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 06:46:06,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:06,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400611126] [2022-01-10 06:46:06,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400611126] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:06,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:46:06,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2022-01-10 06:46:06,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525780302] [2022-01-10 06:46:06,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:06,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:46:06,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:06,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:46:06,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:46:06,986 INFO L87 Difference]: Start difference. First operand 1974 states and 2574 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:46:07,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:07,207 INFO L93 Difference]: Finished difference Result 4176 states and 5575 transitions. [2022-01-10 06:46:07,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:46:07,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 127 [2022-01-10 06:46:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:07,213 INFO L225 Difference]: With dead ends: 4176 [2022-01-10 06:46:07,213 INFO L226 Difference]: Without dead ends: 2428 [2022-01-10 06:46:07,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:46:07,217 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 388 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:07,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 2068 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2022-01-10 06:46:07,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1953. [2022-01-10 06:46:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1480 states have (on average 1.302027027027027) internal successors, (1927), 1491 states have internal predecessors, (1927), 305 states have call successors, (305), 167 states have call predecessors, (305), 167 states have return successors, (305), 294 states have call predecessors, (305), 305 states have call successors, (305) [2022-01-10 06:46:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2537 transitions. [2022-01-10 06:46:07,323 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2537 transitions. Word has length 127 [2022-01-10 06:46:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:07,324 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 2537 transitions. [2022-01-10 06:46:07,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:46:07,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2537 transitions. [2022-01-10 06:46:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-10 06:46:07,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:07,325 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:07,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:07,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:07,535 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1680613892, now seen corresponding path program 1 times [2022-01-10 06:46:07,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:07,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352562394] [2022-01-10 06:46:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:07,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:07,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:07,537 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:07,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 06:46:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:07,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:46:07,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 06:46:07,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:07,779 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:07,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352562394] [2022-01-10 06:46:07,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352562394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:07,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:07,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:46:07,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456896348] [2022-01-10 06:46:07,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:07,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:46:07,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:07,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:46:07,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:07,780 INFO L87 Difference]: Start difference. First operand 1953 states and 2537 transitions. Second operand has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-01-10 06:46:07,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:07,983 INFO L93 Difference]: Finished difference Result 2808 states and 3851 transitions. [2022-01-10 06:46:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:46:07,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 130 [2022-01-10 06:46:07,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:07,991 INFO L225 Difference]: With dead ends: 2808 [2022-01-10 06:46:07,991 INFO L226 Difference]: Without dead ends: 2806 [2022-01-10 06:46:07,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:46:07,993 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 262 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:07,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 1986 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2022-01-10 06:46:08,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 1948. [2022-01-10 06:46:08,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1473 states have (on average 1.3034623217922607) internal successors, (1920), 1485 states have internal predecessors, (1920), 306 states have call successors, (306), 168 states have call predecessors, (306), 168 states have return successors, (306), 294 states have call predecessors, (306), 306 states have call successors, (306) [2022-01-10 06:46:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 2532 transitions. [2022-01-10 06:46:08,096 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 2532 transitions. Word has length 130 [2022-01-10 06:46:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:08,097 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 2532 transitions. [2022-01-10 06:46:08,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-01-10 06:46:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 2532 transitions. [2022-01-10 06:46:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 06:46:08,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:08,098 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:08,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:08,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:08,307 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:08,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2145986412, now seen corresponding path program 1 times [2022-01-10 06:46:08,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:08,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46099799] [2022-01-10 06:46:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:08,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:08,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:08,309 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:08,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 06:46:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:08,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:46:08,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 06:46:08,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:46:08,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:08,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46099799] [2022-01-10 06:46:08,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46099799] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:08,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:46:08,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-01-10 06:46:08,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810059046] [2022-01-10 06:46:08,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:08,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:46:08,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:08,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:46:08,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:46:08,915 INFO L87 Difference]: Start difference. First operand 1948 states and 2532 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:46:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:09,152 INFO L93 Difference]: Finished difference Result 3941 states and 5226 transitions. [2022-01-10 06:46:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:46:09,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 133 [2022-01-10 06:46:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:09,158 INFO L225 Difference]: With dead ends: 3941 [2022-01-10 06:46:09,158 INFO L226 Difference]: Without dead ends: 2258 [2022-01-10 06:46:09,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:46:09,162 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 425 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:09,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 2038 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2022-01-10 06:46:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1746. [2022-01-10 06:46:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1329 states have (on average 1.2957110609480813) internal successors, (1722), 1340 states have internal predecessors, (1722), 268 states have call successors, (268), 148 states have call predecessors, (268), 148 states have return successors, (268), 257 states have call predecessors, (268), 268 states have call successors, (268) [2022-01-10 06:46:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2258 transitions. [2022-01-10 06:46:09,262 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2258 transitions. Word has length 133 [2022-01-10 06:46:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:09,263 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 2258 transitions. [2022-01-10 06:46:09,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:46:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2258 transitions. [2022-01-10 06:46:09,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-10 06:46:09,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:09,267 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:09,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-01-10 06:46:09,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:09,476 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:09,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1459364186, now seen corresponding path program 1 times [2022-01-10 06:46:09,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:09,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673546046] [2022-01-10 06:46:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:09,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:09,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:09,478 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:09,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 06:46:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:09,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:46:09,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 75 proven. 17 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:46:10,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-01-10 06:46:10,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:10,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673546046] [2022-01-10 06:46:10,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673546046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:10,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:10,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-01-10 06:46:10,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257981169] [2022-01-10 06:46:10,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:10,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:46:10,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:10,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:46:10,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:46:10,633 INFO L87 Difference]: Start difference. First operand 1746 states and 2258 transitions. Second operand has 18 states, 18 states have (on average 14.833333333333334) internal successors, (267), 18 states have internal predecessors, (267), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:13,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:13,578 INFO L93 Difference]: Finished difference Result 4932 states and 6685 transitions. [2022-01-10 06:46:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-10 06:46:13,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 14.833333333333334) internal successors, (267), 18 states have internal predecessors, (267), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) Word has length 210 [2022-01-10 06:46:13,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:13,588 INFO L225 Difference]: With dead ends: 4932 [2022-01-10 06:46:13,589 INFO L226 Difference]: Without dead ends: 3459 [2022-01-10 06:46:13,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 403 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=3470, Unknown=0, NotChecked=0, Total=4290 [2022-01-10 06:46:13,594 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 3257 mSDsluCounter, 3432 mSDsCounter, 0 mSdLazyCounter, 2981 mSolverCounterSat, 1061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3257 SdHoareTripleChecker+Valid, 3870 SdHoareTripleChecker+Invalid, 4042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1061 IncrementalHoareTripleChecker+Valid, 2981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:13,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3257 Valid, 3870 Invalid, 4042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1061 Valid, 2981 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-10 06:46:13,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2022-01-10 06:46:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 2337. [2022-01-10 06:46:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 1774 states have (on average 1.2891770011273957) internal successors, (2287), 1788 states have internal predecessors, (2287), 358 states have call successors, (358), 204 states have call predecessors, (358), 204 states have return successors, (358), 344 states have call predecessors, (358), 358 states have call successors, (358) [2022-01-10 06:46:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 3003 transitions. [2022-01-10 06:46:13,778 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 3003 transitions. Word has length 210 [2022-01-10 06:46:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:13,778 INFO L470 AbstractCegarLoop]: Abstraction has 2337 states and 3003 transitions. [2022-01-10 06:46:13,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.833333333333334) internal successors, (267), 18 states have internal predecessors, (267), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:13,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 3003 transitions. [2022-01-10 06:46:13,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-10 06:46:13,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:13,782 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:13,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:13,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:13,992 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:13,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1284782518, now seen corresponding path program 1 times [2022-01-10 06:46:13,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:13,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646182416] [2022-01-10 06:46:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:13,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:13,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:13,994 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:13,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 06:46:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:46:14,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 79 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:46:14,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-01-10 06:46:15,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:15,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646182416] [2022-01-10 06:46:15,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646182416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:15,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:15,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-01-10 06:46:15,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318737548] [2022-01-10 06:46:15,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:15,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:46:15,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:46:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:46:15,102 INFO L87 Difference]: Start difference. First operand 2337 states and 3003 transitions. Second operand has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:18,795 INFO L93 Difference]: Finished difference Result 6738 states and 9071 transitions. [2022-01-10 06:46:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-10 06:46:18,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) Word has length 211 [2022-01-10 06:46:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:18,808 INFO L225 Difference]: With dead ends: 6738 [2022-01-10 06:46:18,808 INFO L226 Difference]: Without dead ends: 4758 [2022-01-10 06:46:18,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 407 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=787, Invalid=3503, Unknown=0, NotChecked=0, Total=4290 [2022-01-10 06:46:18,814 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 2850 mSDsluCounter, 5020 mSDsCounter, 0 mSdLazyCounter, 3978 mSolverCounterSat, 1504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2850 SdHoareTripleChecker+Valid, 5680 SdHoareTripleChecker+Invalid, 5482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1504 IncrementalHoareTripleChecker+Valid, 3978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:18,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2850 Valid, 5680 Invalid, 5482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1504 Valid, 3978 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-10 06:46:18,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4758 states. [2022-01-10 06:46:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4758 to 3324. [2022-01-10 06:46:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 2533 states have (on average 1.2826687722068693) internal successors, (3249), 2553 states have internal predecessors, (3249), 498 states have call successors, (498), 292 states have call predecessors, (498), 292 states have return successors, (498), 478 states have call predecessors, (498), 498 states have call successors, (498) [2022-01-10 06:46:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 4245 transitions. [2022-01-10 06:46:19,119 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 4245 transitions. Word has length 211 [2022-01-10 06:46:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:19,121 INFO L470 AbstractCegarLoop]: Abstraction has 3324 states and 4245 transitions. [2022-01-10 06:46:19,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 4245 transitions. [2022-01-10 06:46:19,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-10 06:46:19,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:19,128 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:19,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-01-10 06:46:19,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:19,339 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:19,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:19,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1437816907, now seen corresponding path program 1 times [2022-01-10 06:46:19,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:19,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270274939] [2022-01-10 06:46:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:19,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:19,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:19,341 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:19,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 06:46:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:19,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:46:19,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:46:19,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-01-10 06:46:20,193 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:20,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270274939] [2022-01-10 06:46:20,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270274939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:20,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:20,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-01-10 06:46:20,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43748041] [2022-01-10 06:46:20,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:20,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:46:20,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:20,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:46:20,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:46:20,194 INFO L87 Difference]: Start difference. First operand 3324 states and 4245 transitions. Second operand has 12 states, 12 states have (on average 24.166666666666668) internal successors, (290), 12 states have internal predecessors, (290), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:21,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:21,590 INFO L93 Difference]: Finished difference Result 9420 states and 12908 transitions. [2022-01-10 06:46:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 06:46:21,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 24.166666666666668) internal successors, (290), 12 states have internal predecessors, (290), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) Word has length 212 [2022-01-10 06:46:21,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:21,610 INFO L225 Difference]: With dead ends: 9420 [2022-01-10 06:46:21,610 INFO L226 Difference]: Without dead ends: 6595 [2022-01-10 06:46:21,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 414 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:46:21,617 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 1687 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1687 SdHoareTripleChecker+Valid, 2438 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:21,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1687 Valid, 2438 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [677 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 06:46:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6595 states. [2022-01-10 06:46:21,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6595 to 3631. [2022-01-10 06:46:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 2804 states have (on average 1.283166904422254) internal successors, (3598), 2824 states have internal predecessors, (3598), 516 states have call successors, (516), 310 states have call predecessors, (516), 310 states have return successors, (516), 496 states have call predecessors, (516), 516 states have call successors, (516) [2022-01-10 06:46:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 4630 transitions. [2022-01-10 06:46:21,998 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 4630 transitions. Word has length 212 [2022-01-10 06:46:21,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:21,998 INFO L470 AbstractCegarLoop]: Abstraction has 3631 states and 4630 transitions. [2022-01-10 06:46:21,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.166666666666668) internal successors, (290), 12 states have internal predecessors, (290), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:21,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 4630 transitions. [2022-01-10 06:46:22,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-10 06:46:22,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:22,004 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:22,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:22,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:22,212 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:22,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1209328476, now seen corresponding path program 1 times [2022-01-10 06:46:22,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:22,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696977919] [2022-01-10 06:46:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:22,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:22,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:22,213 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:22,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 06:46:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:22,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:46:22,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 80 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:46:22,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-01-10 06:46:22,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696977919] [2022-01-10 06:46:22,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696977919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:22,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:22,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 06:46:22,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195106719] [2022-01-10 06:46:22,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:22,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:46:22,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:22,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:46:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:46:22,970 INFO L87 Difference]: Start difference. First operand 3631 states and 4630 transitions. Second operand has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 6 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) [2022-01-10 06:46:24,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:24,741 INFO L93 Difference]: Finished difference Result 14658 states and 19985 transitions. [2022-01-10 06:46:24,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 06:46:24,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 6 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) Word has length 213 [2022-01-10 06:46:24,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:24,770 INFO L225 Difference]: With dead ends: 14658 [2022-01-10 06:46:24,770 INFO L226 Difference]: Without dead ends: 11526 [2022-01-10 06:46:24,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2022-01-10 06:46:24,778 INFO L933 BasicCegarLoop]: 1091 mSDtfsCounter, 1749 mSDsluCounter, 6908 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1824 SdHoareTripleChecker+Valid, 7999 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:24,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1824 Valid, 7999 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 06:46:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11526 states. [2022-01-10 06:46:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11526 to 6207. [2022-01-10 06:46:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6207 states, 4849 states have (on average 1.2713961641575582) internal successors, (6165), 4879 states have internal predecessors, (6165), 833 states have call successors, (833), 524 states have call predecessors, (833), 524 states have return successors, (833), 803 states have call predecessors, (833), 833 states have call successors, (833) [2022-01-10 06:46:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6207 states to 6207 states and 7831 transitions. [2022-01-10 06:46:25,442 INFO L78 Accepts]: Start accepts. Automaton has 6207 states and 7831 transitions. Word has length 213 [2022-01-10 06:46:25,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:25,443 INFO L470 AbstractCegarLoop]: Abstraction has 6207 states and 7831 transitions. [2022-01-10 06:46:25,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 6 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) [2022-01-10 06:46:25,443 INFO L276 IsEmpty]: Start isEmpty. Operand 6207 states and 7831 transitions. [2022-01-10 06:46:25,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-10 06:46:25,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:25,452 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:25,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-01-10 06:46:25,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:25,662 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:25,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:25,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1119268186, now seen corresponding path program 1 times [2022-01-10 06:46:25,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:25,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459636002] [2022-01-10 06:46:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:25,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:25,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:25,664 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:25,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 06:46:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:25,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:25,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-01-10 06:46:26,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:26,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:26,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459636002] [2022-01-10 06:46:26,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459636002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:26,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:26,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:26,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038654266] [2022-01-10 06:46:26,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:26,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:26,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:26,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:26,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:26,102 INFO L87 Difference]: Start difference. First operand 6207 states and 7831 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:46:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:26,484 INFO L93 Difference]: Finished difference Result 10182 states and 13007 transitions. [2022-01-10 06:46:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 213 [2022-01-10 06:46:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:26,493 INFO L225 Difference]: With dead ends: 10182 [2022-01-10 06:46:26,493 INFO L226 Difference]: Without dead ends: 4474 [2022-01-10 06:46:26,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:26,503 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 289 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:26,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 442 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4474 states. [2022-01-10 06:46:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4474 to 4474. [2022-01-10 06:46:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 3519 states have (on average 1.2804774083546462) internal successors, (4506), 3540 states have internal predecessors, (4506), 587 states have call successors, (587), 367 states have call predecessors, (587), 367 states have return successors, (587), 566 states have call predecessors, (587), 587 states have call successors, (587) [2022-01-10 06:46:26,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 5680 transitions. [2022-01-10 06:46:26,925 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 5680 transitions. Word has length 213 [2022-01-10 06:46:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:26,925 INFO L470 AbstractCegarLoop]: Abstraction has 4474 states and 5680 transitions. [2022-01-10 06:46:26,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:46:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 5680 transitions. [2022-01-10 06:46:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-10 06:46:26,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:26,932 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:26,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:27,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:27,142 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:27,142 INFO L85 PathProgramCache]: Analyzing trace with hash -488478373, now seen corresponding path program 1 times [2022-01-10 06:46:27,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:27,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080629701] [2022-01-10 06:46:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:27,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:27,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:27,144 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:27,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 06:46:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:27,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:46:27,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-01-10 06:46:27,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:27,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:27,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080629701] [2022-01-10 06:46:27,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080629701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:27,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:27,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:46:27,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528379295] [2022-01-10 06:46:27,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:27,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:46:27,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:27,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:46:27,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:46:27,574 INFO L87 Difference]: Start difference. First operand 4474 states and 5680 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:46:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:28,684 INFO L93 Difference]: Finished difference Result 16170 states and 21543 transitions. [2022-01-10 06:46:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:46:28,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 216 [2022-01-10 06:46:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:28,716 INFO L225 Difference]: With dead ends: 16170 [2022-01-10 06:46:28,716 INFO L226 Difference]: Without dead ends: 12206 [2022-01-10 06:46:28,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:46:28,727 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 825 mSDsluCounter, 2227 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 2706 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:28,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 2706 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:46:28,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12206 states. [2022-01-10 06:46:29,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12206 to 6416. [2022-01-10 06:46:29,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 4923 states have (on average 1.2843794434288036) internal successors, (6323), 4958 states have internal predecessors, (6323), 945 states have call successors, (945), 547 states have call predecessors, (945), 547 states have return successors, (945), 910 states have call predecessors, (945), 945 states have call successors, (945) [2022-01-10 06:46:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 8213 transitions. [2022-01-10 06:46:29,298 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 8213 transitions. Word has length 216 [2022-01-10 06:46:29,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:29,299 INFO L470 AbstractCegarLoop]: Abstraction has 6416 states and 8213 transitions. [2022-01-10 06:46:29,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:46:29,299 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 8213 transitions. [2022-01-10 06:46:29,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-10 06:46:29,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:29,308 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:29,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:29,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:29,518 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:29,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:29,518 INFO L85 PathProgramCache]: Analyzing trace with hash -544427558, now seen corresponding path program 1 times [2022-01-10 06:46:29,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:29,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168756169] [2022-01-10 06:46:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:29,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:29,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:29,520 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:29,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 06:46:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:29,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:46:29,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 99 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-10 06:46:30,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-01-10 06:46:30,405 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:30,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168756169] [2022-01-10 06:46:30,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168756169] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:30,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:30,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-01-10 06:46:30,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928325867] [2022-01-10 06:46:30,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:30,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:46:30,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:46:30,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:46:30,407 INFO L87 Difference]: Start difference. First operand 6416 states and 8213 transitions. Second operand has 8 states, 8 states have (on average 23.125) internal successors, (185), 7 states have internal predecessors, (185), 3 states have call successors, (34), 4 states have call predecessors, (34), 6 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) [2022-01-10 06:46:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:31,086 INFO L93 Difference]: Finished difference Result 13872 states and 18163 transitions. [2022-01-10 06:46:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:46:31,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.125) internal successors, (185), 7 states have internal predecessors, (185), 3 states have call successors, (34), 4 states have call predecessors, (34), 6 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) Word has length 217 [2022-01-10 06:46:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:31,104 INFO L225 Difference]: With dead ends: 13872 [2022-01-10 06:46:31,104 INFO L226 Difference]: Without dead ends: 7910 [2022-01-10 06:46:31,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 426 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:46:31,114 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 363 mSDsluCounter, 2376 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:31,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 2873 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:31,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7910 states. [2022-01-10 06:46:31,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7910 to 6416. [2022-01-10 06:46:31,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 4923 states have (on average 1.2839731870810482) internal successors, (6321), 4958 states have internal predecessors, (6321), 945 states have call successors, (945), 547 states have call predecessors, (945), 547 states have return successors, (945), 910 states have call predecessors, (945), 945 states have call successors, (945) [2022-01-10 06:46:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 8211 transitions. [2022-01-10 06:46:31,659 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 8211 transitions. Word has length 217 [2022-01-10 06:46:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:31,659 INFO L470 AbstractCegarLoop]: Abstraction has 6416 states and 8211 transitions. [2022-01-10 06:46:31,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.125) internal successors, (185), 7 states have internal predecessors, (185), 3 states have call successors, (34), 4 states have call predecessors, (34), 6 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) [2022-01-10 06:46:31,660 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 8211 transitions. [2022-01-10 06:46:31,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-10 06:46:31,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:31,669 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:31,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:31,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:31,878 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:31,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1376166347, now seen corresponding path program 1 times [2022-01-10 06:46:31,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:31,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417277376] [2022-01-10 06:46:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:31,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:31,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:31,881 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:31,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 06:46:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:32,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:46:32,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 67 proven. 60 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:46:32,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-01-10 06:46:32,786 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:32,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417277376] [2022-01-10 06:46:32,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417277376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:32,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:32,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-01-10 06:46:32,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535937413] [2022-01-10 06:46:32,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:32,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:46:32,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:32,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:46:32,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:46:32,788 INFO L87 Difference]: Start difference. First operand 6416 states and 8211 transitions. Second operand has 10 states, 10 states have (on average 20.1) internal successors, (201), 9 states have internal predecessors, (201), 4 states have call successors, (35), 4 states have call predecessors, (35), 6 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) [2022-01-10 06:46:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:34,467 INFO L93 Difference]: Finished difference Result 19620 states and 25833 transitions. [2022-01-10 06:46:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:46:34,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.1) internal successors, (201), 9 states have internal predecessors, (201), 4 states have call successors, (35), 4 states have call predecessors, (35), 6 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) Word has length 222 [2022-01-10 06:46:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:34,503 INFO L225 Difference]: With dead ends: 19620 [2022-01-10 06:46:34,503 INFO L226 Difference]: Without dead ends: 13714 [2022-01-10 06:46:34,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:46:34,516 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 1744 mSDsluCounter, 3304 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1749 SdHoareTripleChecker+Valid, 4073 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:34,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1749 Valid, 4073 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:46:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13714 states. [2022-01-10 06:46:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13714 to 10326. [2022-01-10 06:46:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10326 states, 7757 states have (on average 1.286579863349233) internal successors, (9980), 7820 states have internal predecessors, (9980), 1661 states have call successors, (1661), 907 states have call predecessors, (1661), 907 states have return successors, (1661), 1598 states have call predecessors, (1661), 1661 states have call successors, (1661) [2022-01-10 06:46:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10326 states to 10326 states and 13302 transitions. [2022-01-10 06:46:35,400 INFO L78 Accepts]: Start accepts. Automaton has 10326 states and 13302 transitions. Word has length 222 [2022-01-10 06:46:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:35,400 INFO L470 AbstractCegarLoop]: Abstraction has 10326 states and 13302 transitions. [2022-01-10 06:46:35,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.1) internal successors, (201), 9 states have internal predecessors, (201), 4 states have call successors, (35), 4 states have call predecessors, (35), 6 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) [2022-01-10 06:46:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 10326 states and 13302 transitions. [2022-01-10 06:46:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-10 06:46:35,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:35,411 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:35,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-01-10 06:46:35,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:35,620 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:35,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1192841241, now seen corresponding path program 1 times [2022-01-10 06:46:35,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:35,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801638739] [2022-01-10 06:46:35,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:35,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:35,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:35,622 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:35,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 06:46:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:35,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:46:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 96 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 06:46:36,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-01-10 06:46:36,828 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:36,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801638739] [2022-01-10 06:46:36,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801638739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:36,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:36,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-01-10 06:46:36,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683975918] [2022-01-10 06:46:36,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:36,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:46:36,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:36,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:46:36,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:46:36,830 INFO L87 Difference]: Start difference. First operand 10326 states and 13302 transitions. Second operand has 18 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 7 states have call successors, (39), 5 states have call predecessors, (39), 5 states have return successors, (38), 7 states have call predecessors, (38), 7 states have call successors, (38) [2022-01-10 06:46:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:41,450 INFO L93 Difference]: Finished difference Result 25093 states and 33129 transitions. [2022-01-10 06:46:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-10 06:46:41,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 7 states have call successors, (39), 5 states have call predecessors, (39), 5 states have return successors, (38), 7 states have call predecessors, (38), 7 states have call successors, (38) Word has length 224 [2022-01-10 06:46:41,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:41,482 INFO L225 Difference]: With dead ends: 25093 [2022-01-10 06:46:41,483 INFO L226 Difference]: Without dead ends: 15277 [2022-01-10 06:46:41,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 436 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=850, Invalid=3182, Unknown=0, NotChecked=0, Total=4032 [2022-01-10 06:46:41,493 INFO L933 BasicCegarLoop]: 747 mSDtfsCounter, 2428 mSDsluCounter, 6127 mSDsCounter, 0 mSdLazyCounter, 4983 mSolverCounterSat, 1310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2428 SdHoareTripleChecker+Valid, 6874 SdHoareTripleChecker+Invalid, 6293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1310 IncrementalHoareTripleChecker+Valid, 4983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:41,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2428 Valid, 6874 Invalid, 6293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1310 Valid, 4983 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-10 06:46:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15277 states. [2022-01-10 06:46:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15277 to 11921. [2022-01-10 06:46:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11921 states, 8971 states have (on average 1.2844721881618548) internal successors, (11523), 9043 states have internal predecessors, (11523), 1911 states have call successors, (1911), 1038 states have call predecessors, (1911), 1038 states have return successors, (1911), 1839 states have call predecessors, (1911), 1911 states have call successors, (1911) [2022-01-10 06:46:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11921 states to 11921 states and 15345 transitions. [2022-01-10 06:46:42,374 INFO L78 Accepts]: Start accepts. Automaton has 11921 states and 15345 transitions. Word has length 224 [2022-01-10 06:46:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:42,375 INFO L470 AbstractCegarLoop]: Abstraction has 11921 states and 15345 transitions. [2022-01-10 06:46:42,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 7 states have call successors, (39), 5 states have call predecessors, (39), 5 states have return successors, (38), 7 states have call predecessors, (38), 7 states have call successors, (38) [2022-01-10 06:46:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 11921 states and 15345 transitions. [2022-01-10 06:46:42,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-10 06:46:42,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:42,387 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:42,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:42,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:42,596 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:42,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:42,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1176450, now seen corresponding path program 1 times [2022-01-10 06:46:42,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:42,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490133773] [2022-01-10 06:46:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:42,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:42,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:42,598 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:42,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 06:46:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:42,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:46:42,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 06:46:43,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:43,068 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490133773] [2022-01-10 06:46:43,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490133773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:43,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:43,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:46:43,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102172124] [2022-01-10 06:46:43,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:43,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:46:43,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:43,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:46:43,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:46:43,070 INFO L87 Difference]: Start difference. First operand 11921 states and 15345 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:46:44,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:44,575 INFO L93 Difference]: Finished difference Result 27456 states and 36453 transitions. [2022-01-10 06:46:44,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:46:44,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 224 [2022-01-10 06:46:44,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:44,609 INFO L225 Difference]: With dead ends: 27456 [2022-01-10 06:46:44,610 INFO L226 Difference]: Without dead ends: 16136 [2022-01-10 06:46:44,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:46:44,626 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 721 mSDsluCounter, 1689 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 2272 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:44,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 2272 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:46:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16136 states. [2022-01-10 06:46:45,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16136 to 11905. [2022-01-10 06:46:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11905 states, 8955 states have (on average 1.2814070351758795) internal successors, (11475), 9027 states have internal predecessors, (11475), 1911 states have call successors, (1911), 1038 states have call predecessors, (1911), 1038 states have return successors, (1911), 1839 states have call predecessors, (1911), 1911 states have call successors, (1911) [2022-01-10 06:46:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11905 states to 11905 states and 15297 transitions. [2022-01-10 06:46:45,613 INFO L78 Accepts]: Start accepts. Automaton has 11905 states and 15297 transitions. Word has length 224 [2022-01-10 06:46:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:45,614 INFO L470 AbstractCegarLoop]: Abstraction has 11905 states and 15297 transitions. [2022-01-10 06:46:45,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:46:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 11905 states and 15297 transitions. [2022-01-10 06:46:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-10 06:46:45,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:45,623 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:45,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-01-10 06:46:45,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:45,824 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:45,824 INFO L85 PathProgramCache]: Analyzing trace with hash -690576058, now seen corresponding path program 1 times [2022-01-10 06:46:45,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:45,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927586749] [2022-01-10 06:46:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:45,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:45,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:45,826 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:45,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 06:46:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:45,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:46:45,952 INFO L286 TraceCheckSpWp]: Computing forward predicates...