/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 06:16:35,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 06:16:35,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 06:16:35,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 06:16:35,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 06:16:35,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 06:16:35,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 06:16:35,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 06:16:35,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 06:16:35,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 06:16:35,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 06:16:35,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 06:16:35,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 06:16:35,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 06:16:35,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 06:16:35,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 06:16:35,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 06:16:35,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 06:16:35,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 06:16:35,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 06:16:35,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 06:16:35,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 06:16:35,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 06:16:35,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 06:16:35,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 06:16:35,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 06:16:35,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 06:16:35,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 06:16:35,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 06:16:35,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 06:16:35,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 06:16:35,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 06:16:35,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 06:16:35,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 06:16:35,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 06:16:35,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 06:16:35,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 06:16:35,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 06:16:35,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 06:16:35,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 06:16:35,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 06:16:35,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 06:16:35,555 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 06:16:35,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 06:16:35,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 06:16:35,556 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 06:16:35,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 06:16:35,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 06:16:35,557 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 06:16:35,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 06:16:35,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 06:16:35,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 06:16:35,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 06:16:35,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 06:16:35,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 06:16:35,558 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 06:16:35,558 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 06:16:35,558 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 06:16:35,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 06:16:35,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 06:16:35,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 06:16:35,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 06:16:35,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 06:16:35,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:16:35,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 06:16:35,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 06:16:35,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 06:16:35,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 06:16:35,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 06:16:35,559 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 06:16:35,559 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 06:16:35,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 06:16:35,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 06:16:35,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 06:16:35,560 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 06:16:35,560 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 06:16:35,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 06:16:35,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 06:16:35,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 06:16:35,738 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 06:16:35,740 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 06:16:35,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c [2022-01-11 06:16:35,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7168ef4ab/e5a01b3028974042be3ac2ff67884748/FLAG36765173d [2022-01-11 06:16:36,261 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 06:16:36,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c [2022-01-11 06:16:36,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7168ef4ab/e5a01b3028974042be3ac2ff67884748/FLAG36765173d [2022-01-11 06:16:36,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7168ef4ab/e5a01b3028974042be3ac2ff67884748 [2022-01-11 06:16:36,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 06:16:36,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 06:16:36,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 06:16:36,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 06:16:36,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 06:16:36,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:16:36" (1/1) ... [2022-01-11 06:16:36,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3739bf13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:36, skipping insertion in model container [2022-01-11 06:16:36,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:16:36" (1/1) ... [2022-01-11 06:16:36,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 06:16:36,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 06:16:37,036 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_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c[12951,12964] [2022-01-11 06:16:37,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:16:37,050 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 06:16:37,098 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_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c[12951,12964] [2022-01-11 06:16:37,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:16:37,109 INFO L208 MainTranslator]: Completed translation [2022-01-11 06:16:37,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:37 WrapperNode [2022-01-11 06:16:37,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 06:16:37,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 06:16:37,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 06:16:37,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 06:16:37,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:37" (1/1) ... [2022-01-11 06:16:37,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:37" (1/1) ... [2022-01-11 06:16:37,147 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 450 [2022-01-11 06:16:37,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 06:16:37,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 06:16:37,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 06:16:37,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 06:16:37,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:37" (1/1) ... [2022-01-11 06:16:37,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:37" (1/1) ... [2022-01-11 06:16:37,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:37" (1/1) ... [2022-01-11 06:16:37,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:37" (1/1) ... [2022-01-11 06:16:37,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:37" (1/1) ... [2022-01-11 06:16:37,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:37" (1/1) ... [2022-01-11 06:16:37,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:37" (1/1) ... [2022-01-11 06:16:37,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 06:16:37,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 06:16:37,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 06:16:37,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 06:16:37,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:37" (1/1) ... [2022-01-11 06:16:37,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:16:37,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:16:37,226 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) [2022-01-11 06:16:37,227 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 [2022-01-11 06:16:37,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 06:16:37,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 06:16:37,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 06:16:37,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 06:16:37,365 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 06:16:37,366 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 06:16:37,785 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 06:16:37,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 06:16:37,791 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-11 06:16:37,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:16:37 BoogieIcfgContainer [2022-01-11 06:16:37,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 06:16:37,793 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 06:16:37,793 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 06:16:37,794 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 06:16:37,796 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:16:37" (1/1) ... [2022-01-11 06:16:38,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:16:38 BasicIcfg [2022-01-11 06:16:38,049 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 06:16:38,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 06:16:38,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 06:16:38,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 06:16:38,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 06:16:36" (1/4) ... [2022-01-11 06:16:38,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56320532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:16:38, skipping insertion in model container [2022-01-11 06:16:38,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:37" (2/4) ... [2022-01-11 06:16:38,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56320532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:16:38, skipping insertion in model container [2022-01-11 06:16:38,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:16:37" (3/4) ... [2022-01-11 06:16:38,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56320532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 06:16:38, skipping insertion in model container [2022-01-11 06:16:38,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:16:38" (4/4) ... [2022-01-11 06:16:38,053 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.cTransformedIcfg [2022-01-11 06:16:38,056 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 06:16:38,057 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 06:16:38,099 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 06:16:38,107 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 [2022-01-11 06:16:38,108 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 06:16:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 141 states have (on average 1.7375886524822695) internal successors, (245), 142 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:38,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-11 06:16:38,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:38,134 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] [2022-01-11 06:16:38,134 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:38,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2016363261, now seen corresponding path program 1 times [2022-01-11 06:16:38,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121725648] [2022-01-11 06:16:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:38,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:38,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:38,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121725648] [2022-01-11 06:16:38,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121725648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:38,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:38,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 06:16:38,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281938064] [2022-01-11 06:16:38,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:38,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 06:16:38,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:38,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 06:16:38,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 06:16:38,418 INFO L87 Difference]: Start difference. First operand has 143 states, 141 states have (on average 1.7375886524822695) internal successors, (245), 142 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:38,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:38,450 INFO L93 Difference]: Finished difference Result 229 states and 391 transitions. [2022-01-11 06:16:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 06:16:38,452 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-11 06:16:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:38,461 INFO L225 Difference]: With dead ends: 229 [2022-01-11 06:16:38,461 INFO L226 Difference]: Without dead ends: 139 [2022-01-11 06:16:38,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 06:16:38,470 INFO L933 BasicCegarLoop]: 238 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, 238 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 [2022-01-11 06:16:38,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-11 06:16:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-01-11 06:16:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.7246376811594204) internal successors, (238), 138 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 238 transitions. [2022-01-11 06:16:38,513 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 238 transitions. Word has length 37 [2022-01-11 06:16:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:38,514 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 238 transitions. [2022-01-11 06:16:38,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:38,515 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 238 transitions. [2022-01-11 06:16:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-11 06:16:38,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:38,519 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] [2022-01-11 06:16:38,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 06:16:38,520 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:38,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1607539036, now seen corresponding path program 1 times [2022-01-11 06:16:38,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:38,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221935838] [2022-01-11 06:16:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:38,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:38,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:38,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221935838] [2022-01-11 06:16:38,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221935838] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:38,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:38,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:16:38,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507971373] [2022-01-11 06:16:38,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:38,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:16:38,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:38,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:16:38,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:38,700 INFO L87 Difference]: Start difference. First operand 139 states and 238 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:38,770 INFO L93 Difference]: Finished difference Result 228 states and 384 transitions. [2022-01-11 06:16:38,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 06:16:38,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-11 06:16:38,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:38,771 INFO L225 Difference]: With dead ends: 228 [2022-01-11 06:16:38,772 INFO L226 Difference]: Without dead ends: 139 [2022-01-11 06:16:38,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-11 06:16:38,773 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 3 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:38,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 917 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:38,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-11 06:16:38,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-01-11 06:16:38,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5507246376811594) internal successors, (214), 138 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:38,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 214 transitions. [2022-01-11 06:16:38,778 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 214 transitions. Word has length 37 [2022-01-11 06:16:38,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:38,779 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 214 transitions. [2022-01-11 06:16:38,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:38,779 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 214 transitions. [2022-01-11 06:16:38,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-11 06:16:38,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:38,780 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, 1, 1, 1, 1, 1] [2022-01-11 06:16:38,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 06:16:38,780 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash 84880681, now seen corresponding path program 1 times [2022-01-11 06:16:38,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:38,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136799665] [2022-01-11 06:16:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:38,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:39,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:39,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136799665] [2022-01-11 06:16:39,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136799665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:39,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:39,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:39,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813412745] [2022-01-11 06:16:39,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:39,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:39,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:39,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:39,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:39,009 INFO L87 Difference]: Start difference. First operand 139 states and 214 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:39,063 INFO L93 Difference]: Finished difference Result 299 states and 480 transitions. [2022-01-11 06:16:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:39,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-01-11 06:16:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:39,067 INFO L225 Difference]: With dead ends: 299 [2022-01-11 06:16:39,067 INFO L226 Difference]: Without dead ends: 214 [2022-01-11 06:16:39,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:39,070 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 115 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:39,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 382 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-11 06:16:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2022-01-11 06:16:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.5714285714285714) internal successors, (330), 210 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 330 transitions. [2022-01-11 06:16:39,078 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 330 transitions. Word has length 60 [2022-01-11 06:16:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:39,078 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 330 transitions. [2022-01-11 06:16:39,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 330 transitions. [2022-01-11 06:16:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-11 06:16:39,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:39,079 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:39,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 06:16:39,080 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:39,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:39,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1614988447, now seen corresponding path program 1 times [2022-01-11 06:16:39,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:39,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982843111] [2022-01-11 06:16:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:39,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:39,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:39,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982843111] [2022-01-11 06:16:39,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982843111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:39,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:39,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 06:16:39,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194019267] [2022-01-11 06:16:39,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:39,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 06:16:39,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 06:16:39,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 06:16:39,180 INFO L87 Difference]: Start difference. First operand 211 states and 330 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:39,222 INFO L93 Difference]: Finished difference Result 594 states and 923 transitions. [2022-01-11 06:16:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 06:16:39,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-11 06:16:39,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:39,225 INFO L225 Difference]: With dead ends: 594 [2022-01-11 06:16:39,225 INFO L226 Difference]: Without dead ends: 408 [2022-01-11 06:16:39,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:39,234 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 557 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:39,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 407 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-11 06:16:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2022-01-11 06:16:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.5555555555555556) internal successors, (630), 405 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 630 transitions. [2022-01-11 06:16:39,252 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 630 transitions. Word has length 62 [2022-01-11 06:16:39,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:39,252 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 630 transitions. [2022-01-11 06:16:39,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,253 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 630 transitions. [2022-01-11 06:16:39,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-11 06:16:39,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:39,254 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:39,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-11 06:16:39,254 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:39,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:39,254 INFO L85 PathProgramCache]: Analyzing trace with hash 870780355, now seen corresponding path program 1 times [2022-01-11 06:16:39,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:39,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294928987] [2022-01-11 06:16:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:39,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:39,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:39,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294928987] [2022-01-11 06:16:39,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294928987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:39,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:39,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:39,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866010232] [2022-01-11 06:16:39,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:39,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:39,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:39,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:39,320 INFO L87 Difference]: Start difference. First operand 406 states and 630 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:39,354 INFO L93 Difference]: Finished difference Result 862 states and 1382 transitions. [2022-01-11 06:16:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:39,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-11 06:16:39,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:39,357 INFO L225 Difference]: With dead ends: 862 [2022-01-11 06:16:39,357 INFO L226 Difference]: Without dead ends: 558 [2022-01-11 06:16:39,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:39,361 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 130 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:39,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 417 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:39,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-11 06:16:39,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 542. [2022-01-11 06:16:39,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 1.578558225508318) internal successors, (854), 541 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 854 transitions. [2022-01-11 06:16:39,383 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 854 transitions. Word has length 63 [2022-01-11 06:16:39,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:39,385 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 854 transitions. [2022-01-11 06:16:39,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 854 transitions. [2022-01-11 06:16:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-11 06:16:39,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:39,391 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:39,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-11 06:16:39,392 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:39,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:39,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1178143855, now seen corresponding path program 1 times [2022-01-11 06:16:39,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:39,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993503395] [2022-01-11 06:16:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:39,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:39,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:39,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993503395] [2022-01-11 06:16:39,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993503395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:39,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:39,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:39,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575195454] [2022-01-11 06:16:39,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:39,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:39,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:39,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:39,457 INFO L87 Difference]: Start difference. First operand 542 states and 854 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:39,487 INFO L93 Difference]: Finished difference Result 1588 states and 2498 transitions. [2022-01-11 06:16:39,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:39,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-11 06:16:39,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:39,491 INFO L225 Difference]: With dead ends: 1588 [2022-01-11 06:16:39,491 INFO L226 Difference]: Without dead ends: 1074 [2022-01-11 06:16:39,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:39,493 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 203 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:39,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 619 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-01-11 06:16:39,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 544. [2022-01-11 06:16:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 1.576427255985267) internal successors, (856), 543 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 856 transitions. [2022-01-11 06:16:39,534 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 856 transitions. Word has length 63 [2022-01-11 06:16:39,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:39,534 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 856 transitions. [2022-01-11 06:16:39,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,534 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 856 transitions. [2022-01-11 06:16:39,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-11 06:16:39,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:39,536 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:39,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-11 06:16:39,537 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:39,537 INFO L85 PathProgramCache]: Analyzing trace with hash 207060540, now seen corresponding path program 1 times [2022-01-11 06:16:39,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:39,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569724128] [2022-01-11 06:16:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:39,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:39,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:39,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569724128] [2022-01-11 06:16:39,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569724128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:39,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:39,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:16:39,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030802872] [2022-01-11 06:16:39,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:39,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:16:39,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:39,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:16:39,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:39,636 INFO L87 Difference]: Start difference. First operand 544 states and 856 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:39,685 INFO L93 Difference]: Finished difference Result 1521 states and 2386 transitions. [2022-01-11 06:16:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 06:16:39,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-11 06:16:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:39,689 INFO L225 Difference]: With dead ends: 1521 [2022-01-11 06:16:39,689 INFO L226 Difference]: Without dead ends: 989 [2022-01-11 06:16:39,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:39,690 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 663 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:39,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 487 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-01-11 06:16:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 987. [2022-01-11 06:16:39,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 1.5537525354969575) internal successors, (1532), 986 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1532 transitions. [2022-01-11 06:16:39,717 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1532 transitions. Word has length 64 [2022-01-11 06:16:39,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:39,718 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 1532 transitions. [2022-01-11 06:16:39,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,718 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1532 transitions. [2022-01-11 06:16:39,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-11 06:16:39,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:39,719 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:39,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-11 06:16:39,720 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:39,720 INFO L85 PathProgramCache]: Analyzing trace with hash 958391200, now seen corresponding path program 1 times [2022-01-11 06:16:39,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:39,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973709305] [2022-01-11 06:16:39,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:39,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:39,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:39,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973709305] [2022-01-11 06:16:39,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973709305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:39,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:39,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:39,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457024799] [2022-01-11 06:16:39,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:39,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:39,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:39,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:39,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:39,817 INFO L87 Difference]: Start difference. First operand 987 states and 1532 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:39,874 INFO L93 Difference]: Finished difference Result 2490 states and 3968 transitions. [2022-01-11 06:16:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:39,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-11 06:16:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:39,880 INFO L225 Difference]: With dead ends: 2490 [2022-01-11 06:16:39,880 INFO L226 Difference]: Without dead ends: 1697 [2022-01-11 06:16:39,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:39,881 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 117 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:39,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 395 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:39,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-01-11 06:16:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1684. [2022-01-11 06:16:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 1.5727866904337493) internal successors, (2647), 1683 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2647 transitions. [2022-01-11 06:16:39,963 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2647 transitions. Word has length 64 [2022-01-11 06:16:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:39,965 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 2647 transitions. [2022-01-11 06:16:39,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2647 transitions. [2022-01-11 06:16:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-11 06:16:39,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:39,966 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:39,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-11 06:16:39,966 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:39,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash -279834571, now seen corresponding path program 1 times [2022-01-11 06:16:39,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:39,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62158462] [2022-01-11 06:16:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:39,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:40,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:40,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62158462] [2022-01-11 06:16:40,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62158462] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:40,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:40,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 06:16:40,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202740407] [2022-01-11 06:16:40,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:40,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 06:16:40,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:40,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 06:16:40,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 06:16:40,075 INFO L87 Difference]: Start difference. First operand 1684 states and 2647 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:40,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:40,199 INFO L93 Difference]: Finished difference Result 4882 states and 7657 transitions. [2022-01-11 06:16:40,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 06:16:40,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-11 06:16:40,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:40,209 INFO L225 Difference]: With dead ends: 4882 [2022-01-11 06:16:40,209 INFO L226 Difference]: Without dead ends: 3260 [2022-01-11 06:16:40,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:40,211 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 514 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:40,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 414 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:40,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2022-01-11 06:16:40,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 3258. [2022-01-11 06:16:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3257 states have (on average 1.5591034694504144) internal successors, (5078), 3257 states have internal predecessors, (5078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 5078 transitions. [2022-01-11 06:16:40,369 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 5078 transitions. Word has length 66 [2022-01-11 06:16:40,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:40,369 INFO L470 AbstractCegarLoop]: Abstraction has 3258 states and 5078 transitions. [2022-01-11 06:16:40,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 5078 transitions. [2022-01-11 06:16:40,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-11 06:16:40,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:40,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:40,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-11 06:16:40,377 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:40,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:40,377 INFO L85 PathProgramCache]: Analyzing trace with hash -125758164, now seen corresponding path program 1 times [2022-01-11 06:16:40,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:40,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760829590] [2022-01-11 06:16:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:40,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:40,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:40,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760829590] [2022-01-11 06:16:40,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760829590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:40,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:40,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:40,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7732583] [2022-01-11 06:16:40,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:40,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:40,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:40,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:40,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:40,479 INFO L87 Difference]: Start difference. First operand 3258 states and 5078 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:40,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:40,599 INFO L93 Difference]: Finished difference Result 7577 states and 12011 transitions. [2022-01-11 06:16:40,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:40,599 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-11 06:16:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:40,612 INFO L225 Difference]: With dead ends: 7577 [2022-01-11 06:16:40,612 INFO L226 Difference]: Without dead ends: 4673 [2022-01-11 06:16:40,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:40,618 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 124 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:40,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 409 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2022-01-11 06:16:40,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 4527. [2022-01-11 06:16:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4527 states, 4526 states have (on average 1.5609809986743262) internal successors, (7065), 4526 states have internal predecessors, (7065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:40,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4527 states to 4527 states and 7065 transitions. [2022-01-11 06:16:40,776 INFO L78 Accepts]: Start accepts. Automaton has 4527 states and 7065 transitions. Word has length 67 [2022-01-11 06:16:40,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:40,777 INFO L470 AbstractCegarLoop]: Abstraction has 4527 states and 7065 transitions. [2022-01-11 06:16:40,777 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:40,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4527 states and 7065 transitions. [2022-01-11 06:16:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-11 06:16:40,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:40,779 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:40,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-11 06:16:40,779 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:40,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1986438627, now seen corresponding path program 1 times [2022-01-11 06:16:40,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:40,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216946256] [2022-01-11 06:16:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:40,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:40,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:40,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216946256] [2022-01-11 06:16:40,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216946256] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:40,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:40,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:40,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017055581] [2022-01-11 06:16:40,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:40,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:40,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:40,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:40,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:40,808 INFO L87 Difference]: Start difference. First operand 4527 states and 7065 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:41,004 INFO L93 Difference]: Finished difference Result 13457 states and 20993 transitions. [2022-01-11 06:16:41,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:41,005 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-11 06:16:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:41,027 INFO L225 Difference]: With dead ends: 13457 [2022-01-11 06:16:41,028 INFO L226 Difference]: Without dead ends: 9004 [2022-01-11 06:16:41,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:41,033 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 189 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:41,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 605 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9004 states. [2022-01-11 06:16:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9004 to 4535. [2022-01-11 06:16:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4535 states, 4534 states have (on average 1.5599911777679754) internal successors, (7073), 4534 states have internal predecessors, (7073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4535 states to 4535 states and 7073 transitions. [2022-01-11 06:16:41,214 INFO L78 Accepts]: Start accepts. Automaton has 4535 states and 7073 transitions. Word has length 67 [2022-01-11 06:16:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:41,214 INFO L470 AbstractCegarLoop]: Abstraction has 4535 states and 7073 transitions. [2022-01-11 06:16:41,214 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:41,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4535 states and 7073 transitions. [2022-01-11 06:16:41,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-11 06:16:41,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:41,217 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:41,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-11 06:16:41,217 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:41,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1463841232, now seen corresponding path program 1 times [2022-01-11 06:16:41,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:41,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108089552] [2022-01-11 06:16:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:41,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:41,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:41,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108089552] [2022-01-11 06:16:41,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108089552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:41,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:41,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:16:41,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131838702] [2022-01-11 06:16:41,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:41,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:16:41,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:41,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:16:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:41,305 INFO L87 Difference]: Start difference. First operand 4535 states and 7073 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:41,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:41,676 INFO L93 Difference]: Finished difference Result 16950 states and 26474 transitions. [2022-01-11 06:16:41,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 06:16:41,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-11 06:16:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:41,702 INFO L225 Difference]: With dead ends: 16950 [2022-01-11 06:16:41,702 INFO L226 Difference]: Without dead ends: 12473 [2022-01-11 06:16:41,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-11 06:16:41,708 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 649 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:41,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 863 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:41,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12473 states. [2022-01-11 06:16:42,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12473 to 8187. [2022-01-11 06:16:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8187 states, 8186 states have (on average 1.538602492059614) internal successors, (12595), 8186 states have internal predecessors, (12595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8187 states to 8187 states and 12595 transitions. [2022-01-11 06:16:42,042 INFO L78 Accepts]: Start accepts. Automaton has 8187 states and 12595 transitions. Word has length 68 [2022-01-11 06:16:42,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:42,043 INFO L470 AbstractCegarLoop]: Abstraction has 8187 states and 12595 transitions. [2022-01-11 06:16:42,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 8187 states and 12595 transitions. [2022-01-11 06:16:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-11 06:16:42,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:42,048 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:42,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-11 06:16:42,048 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:42,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:42,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1156243508, now seen corresponding path program 1 times [2022-01-11 06:16:42,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:42,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069989395] [2022-01-11 06:16:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:42,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:42,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:42,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069989395] [2022-01-11 06:16:42,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069989395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:42,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:42,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:42,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653307091] [2022-01-11 06:16:42,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:42,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:42,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:42,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:42,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:42,135 INFO L87 Difference]: Start difference. First operand 8187 states and 12595 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:42,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:42,616 INFO L93 Difference]: Finished difference Result 22367 states and 34869 transitions. [2022-01-11 06:16:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:42,617 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-11 06:16:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:42,644 INFO L225 Difference]: With dead ends: 22367 [2022-01-11 06:16:42,645 INFO L226 Difference]: Without dead ends: 14848 [2022-01-11 06:16:42,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:42,656 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 111 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:42,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 396 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:42,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14848 states. [2022-01-11 06:16:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14848 to 14725. [2022-01-11 06:16:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14725 states, 14724 states have (on average 1.541496875848954) internal successors, (22697), 14724 states have internal predecessors, (22697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14725 states to 14725 states and 22697 transitions. [2022-01-11 06:16:43,296 INFO L78 Accepts]: Start accepts. Automaton has 14725 states and 22697 transitions. Word has length 68 [2022-01-11 06:16:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:43,297 INFO L470 AbstractCegarLoop]: Abstraction has 14725 states and 22697 transitions. [2022-01-11 06:16:43,297 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 14725 states and 22697 transitions. [2022-01-11 06:16:43,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-11 06:16:43,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:43,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:43,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-11 06:16:43,304 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:43,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1487092055, now seen corresponding path program 1 times [2022-01-11 06:16:43,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:43,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797331689] [2022-01-11 06:16:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:43,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:43,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:43,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797331689] [2022-01-11 06:16:43,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797331689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:43,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:43,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 06:16:43,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939549257] [2022-01-11 06:16:43,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:43,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 06:16:43,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:43,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 06:16:43,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 06:16:43,385 INFO L87 Difference]: Start difference. First operand 14725 states and 22697 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:44,332 INFO L93 Difference]: Finished difference Result 42561 states and 65711 transitions. [2022-01-11 06:16:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 06:16:44,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-01-11 06:16:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:44,388 INFO L225 Difference]: With dead ends: 42561 [2022-01-11 06:16:44,388 INFO L226 Difference]: Without dead ends: 28504 [2022-01-11 06:16:44,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:44,405 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 453 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:44,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 456 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:44,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28504 states. [2022-01-11 06:16:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28504 to 28502. [2022-01-11 06:16:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28502 states, 28501 states have (on average 1.5252096417669556) internal successors, (43470), 28501 states have internal predecessors, (43470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28502 states to 28502 states and 43470 transitions. [2022-01-11 06:16:45,645 INFO L78 Accepts]: Start accepts. Automaton has 28502 states and 43470 transitions. Word has length 70 [2022-01-11 06:16:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:45,645 INFO L470 AbstractCegarLoop]: Abstraction has 28502 states and 43470 transitions. [2022-01-11 06:16:45,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 28502 states and 43470 transitions. [2022-01-11 06:16:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-11 06:16:45,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:45,655 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:45,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-11 06:16:45,655 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:45,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1478412041, now seen corresponding path program 1 times [2022-01-11 06:16:45,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:45,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984910966] [2022-01-11 06:16:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:45,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:45,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:45,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984910966] [2022-01-11 06:16:45,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984910966] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:45,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:45,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:45,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858360892] [2022-01-11 06:16:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:45,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:45,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:45,692 INFO L87 Difference]: Start difference. First operand 28502 states and 43470 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:47,364 INFO L93 Difference]: Finished difference Result 84646 states and 129244 transitions. [2022-01-11 06:16:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:47,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-01-11 06:16:47,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:47,472 INFO L225 Difference]: With dead ends: 84646 [2022-01-11 06:16:47,472 INFO L226 Difference]: Without dead ends: 56768 [2022-01-11 06:16:47,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:47,500 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 175 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:47,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 591 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56768 states. [2022-01-11 06:16:48,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56768 to 28542. [2022-01-11 06:16:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28542 states, 28541 states have (on average 1.5244735643460285) internal successors, (43510), 28541 states have internal predecessors, (43510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28542 states to 28542 states and 43510 transitions. [2022-01-11 06:16:48,876 INFO L78 Accepts]: Start accepts. Automaton has 28542 states and 43510 transitions. Word has length 71 [2022-01-11 06:16:48,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:48,876 INFO L470 AbstractCegarLoop]: Abstraction has 28542 states and 43510 transitions. [2022-01-11 06:16:48,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:48,876 INFO L276 IsEmpty]: Start isEmpty. Operand 28542 states and 43510 transitions. [2022-01-11 06:16:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-11 06:16:48,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:48,890 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:48,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-11 06:16:48,890 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:48,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:48,891 INFO L85 PathProgramCache]: Analyzing trace with hash 238222747, now seen corresponding path program 1 times [2022-01-11 06:16:48,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:48,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865033166] [2022-01-11 06:16:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:48,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:48,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:48,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865033166] [2022-01-11 06:16:48,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865033166] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:48,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:48,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:48,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727576124] [2022-01-11 06:16:48,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:48,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:48,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:48,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:48,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:48,955 INFO L87 Difference]: Start difference. First operand 28542 states and 43510 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:50,472 INFO L93 Difference]: Finished difference Result 69017 states and 106071 transitions. [2022-01-11 06:16:50,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:50,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-01-11 06:16:50,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:50,541 INFO L225 Difference]: With dead ends: 69017 [2022-01-11 06:16:50,541 INFO L226 Difference]: Without dead ends: 41719 [2022-01-11 06:16:50,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:50,568 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 118 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:50,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 410 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41719 states. [2022-01-11 06:16:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41719 to 40243. [2022-01-11 06:16:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40243 states, 40242 states have (on average 1.5168480691814523) internal successors, (61041), 40242 states have internal predecessors, (61041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40243 states to 40243 states and 61041 transitions. [2022-01-11 06:16:52,285 INFO L78 Accepts]: Start accepts. Automaton has 40243 states and 61041 transitions. Word has length 71 [2022-01-11 06:16:52,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:52,286 INFO L470 AbstractCegarLoop]: Abstraction has 40243 states and 61041 transitions. [2022-01-11 06:16:52,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:52,286 INFO L276 IsEmpty]: Start isEmpty. Operand 40243 states and 61041 transitions. [2022-01-11 06:16:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-11 06:16:52,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:52,296 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:52,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-11 06:16:52,296 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:52,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1906067939, now seen corresponding path program 1 times [2022-01-11 06:16:52,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:52,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159243385] [2022-01-11 06:16:52,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:52,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:52,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:52,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159243385] [2022-01-11 06:16:52,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159243385] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:52,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:52,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:16:52,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058955194] [2022-01-11 06:16:52,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:52,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:16:52,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:52,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:16:52,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:52,371 INFO L87 Difference]: Start difference. First operand 40243 states and 61041 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:55,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:55,282 INFO L93 Difference]: Finished difference Result 112640 states and 170665 transitions. [2022-01-11 06:16:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 06:16:55,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-01-11 06:16:55,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:55,395 INFO L225 Difference]: With dead ends: 112640 [2022-01-11 06:16:55,396 INFO L226 Difference]: Without dead ends: 72661 [2022-01-11 06:16:55,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:55,430 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 377 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:55,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 649 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:55,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72661 states. [2022-01-11 06:16:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72661 to 72659. [2022-01-11 06:16:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72659 states, 72658 states have (on average 1.5001101048748933) internal successors, (108995), 72658 states have internal predecessors, (108995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72659 states to 72659 states and 108995 transitions. [2022-01-11 06:16:58,701 INFO L78 Accepts]: Start accepts. Automaton has 72659 states and 108995 transitions. Word has length 72 [2022-01-11 06:16:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:58,702 INFO L470 AbstractCegarLoop]: Abstraction has 72659 states and 108995 transitions. [2022-01-11 06:16:58,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 72659 states and 108995 transitions. [2022-01-11 06:16:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-11 06:16:58,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:58,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:58,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-11 06:16:58,728 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:58,728 INFO L85 PathProgramCache]: Analyzing trace with hash -773804440, now seen corresponding path program 1 times [2022-01-11 06:16:58,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:58,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036046913] [2022-01-11 06:16:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:58,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:58,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:58,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036046913] [2022-01-11 06:16:58,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036046913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:58,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:58,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:16:58,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953409257] [2022-01-11 06:16:58,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:58,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:16:58,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:58,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:16:58,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:58,875 INFO L87 Difference]: Start difference. First operand 72659 states and 108995 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:17:20,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:17:20,946 INFO L93 Difference]: Finished difference Result 371417 states and 568061 transitions. [2022-01-11 06:17:20,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 06:17:20,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-01-11 06:17:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:17:21,823 INFO L225 Difference]: With dead ends: 371417 [2022-01-11 06:17:21,823 INFO L226 Difference]: Without dead ends: 300982 [2022-01-11 06:17:21,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-11 06:17:21,906 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 831 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 06:17:21,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 1477 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-11 06:17:22,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300982 states. [2022-01-11 06:17:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300982 to 138532. [2022-01-11 06:17:35,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138532 states, 138531 states have (on average 1.4973182897690769) internal successors, (207425), 138531 states have internal predecessors, (207425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:17:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138532 states to 138532 states and 207425 transitions. [2022-01-11 06:17:35,780 INFO L78 Accepts]: Start accepts. Automaton has 138532 states and 207425 transitions. Word has length 72 [2022-01-11 06:17:35,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:17:35,781 INFO L470 AbstractCegarLoop]: Abstraction has 138532 states and 207425 transitions. [2022-01-11 06:17:35,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:17:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 138532 states and 207425 transitions. [2022-01-11 06:17:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-11 06:17:35,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:17:35,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:17:35,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-11 06:17:35,806 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:17:35,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:17:35,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1752068147, now seen corresponding path program 1 times [2022-01-11 06:17:35,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:17:35,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509506659] [2022-01-11 06:17:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:17:35,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:17:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:17:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:17:35,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:17:35,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509506659] [2022-01-11 06:17:35,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509506659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:17:35,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:17:35,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 06:17:35,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767473031] [2022-01-11 06:17:35,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:17:35,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 06:17:35,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:17:35,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 06:17:35,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 06:17:35,963 INFO L87 Difference]: Start difference. First operand 138532 states and 207425 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)