/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_BITWISE.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:57:41,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:57:41,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:57:41,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 12:57:41,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 12:57:41,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 12:57:41,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 12:57:41,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 12:57:41,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 12:57:41,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 12:57:41,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 12:57:41,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 12:57:41,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:57:41,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:57:41,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:57:41,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:57:41,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:57:41,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:57:41,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:57:41,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:57:41,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:57:41,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:57:41,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:57:41,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:57:41,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 12:57:41,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 12:57:41,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 12:57:41,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 12:57:41,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 12:57:41,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 12:57:41,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 12:57:41,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 12:57:41,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 12:57:41,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:57:41,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:57:41,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:57:41,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 12:57:41,571 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:57:41,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:57:41,572 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:57:41,572 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:57:41,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:57:41,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:57:41,573 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:57:41,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:57:41,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:57:41,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:57:41,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:57:41,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:57:41,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:57:41,575 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:57:41,575 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:57:41,575 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:57:41,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:57:41,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:57:41,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:57:41,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:57:41,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:57:41,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:57:41,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:57:41,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:57:41,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:57:41,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:57:41,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:57:41,577 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:57:41,577 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:57:41,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:57:41,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:57:41,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:57:41,579 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:57:41,579 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:57:41,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:57:41,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:57:41,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:57:41,810 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:57:41,811 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:57:41,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 12:57:41,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/677374e61/2be1f00e9a744a7fb8bf4ffc44a2e1ab/FLAGb7fd261e9 [2022-01-10 12:57:42,374 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:57:42,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 12:57:42,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/677374e61/2be1f00e9a744a7fb8bf4ffc44a2e1ab/FLAGb7fd261e9 [2022-01-10 12:57:42,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/677374e61/2be1f00e9a744a7fb8bf4ffc44a2e1ab [2022-01-10 12:57:42,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:57:42,893 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:57:42,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:57:42,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:57:42,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:57:42,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:57:42" (1/1) ... [2022-01-10 12:57:42,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@585164d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:57:42, skipping insertion in model container [2022-01-10 12:57:42,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:57:42" (1/1) ... [2022-01-10 12:57:42,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:57:42,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:57:43,196 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-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12650,12663] [2022-01-10 12:57:43,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:57:43,316 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:57:43,386 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-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12650,12663] [2022-01-10 12:57:43,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:57:43,454 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:57:43,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:57:43 WrapperNode [2022-01-10 12:57:43,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:57:43,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:57:43,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:57:43,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:57:43,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:57:43" (1/1) ... [2022-01-10 12:57:43,490 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:57:43" (1/1) ... [2022-01-10 12:57:43,564 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1241 [2022-01-10 12:57:43,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:57:43,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:57:43,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:57:43,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:57:43,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:57:43" (1/1) ... [2022-01-10 12:57:43,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:57:43" (1/1) ... [2022-01-10 12:57:43,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:57:43" (1/1) ... [2022-01-10 12:57:43,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:57:43" (1/1) ... [2022-01-10 12:57:43,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:57:43" (1/1) ... [2022-01-10 12:57:43,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:57:43" (1/1) ... [2022-01-10 12:57:43,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:57:43" (1/1) ... [2022-01-10 12:57:43,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:57:43,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:57:43,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:57:43,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:57:43,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:57:43" (1/1) ... [2022-01-10 12:57:43,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:57:43,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:57:43,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 12:57:43,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 12:57:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:57:43,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:57:43,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:57:43,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:57:43,849 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:57:43,851 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:57:44,775 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:57:44,789 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:57:44,790 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:57:44,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:57:44 BoogieIcfgContainer [2022-01-10 12:57:44,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:57:44,794 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:57:44,794 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:57:44,796 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:57:44,798 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:57:44" (1/1) ... [2022-01-10 12:57:45,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:57:45 BasicIcfg [2022-01-10 12:57:45,325 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:57:45,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:57:45,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:57:45,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:57:45,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:57:42" (1/4) ... [2022-01-10 12:57:45,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13faa987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:57:45, skipping insertion in model container [2022-01-10 12:57:45,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:57:43" (2/4) ... [2022-01-10 12:57:45,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13faa987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:57:45, skipping insertion in model container [2022-01-10 12:57:45,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:57:44" (3/4) ... [2022-01-10 12:57:45,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13faa987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:57:45, skipping insertion in model container [2022-01-10 12:57:45,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:57:45" (4/4) ... [2022-01-10 12:57:45,333 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.cTransformedIcfg [2022-01-10 12:57:45,337 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:57:45,338 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:57:45,388 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:57:45,393 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 12:57:45,393 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:57:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 314 states, 312 states have (on average 1.7884615384615385) internal successors, (558), 313 states have internal predecessors, (558), 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) [2022-01-10 12:57:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-10 12:57:45,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:57:45,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:57:45,435 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:57:45,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:57:45,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1017258884, now seen corresponding path program 1 times [2022-01-10 12:57:45,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:57:45,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578526445] [2022-01-10 12:57:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:57:45,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:57:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:57:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:57:46,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:57:46,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578526445] [2022-01-10 12:57:46,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578526445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:57:46,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:57:46,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:57:46,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998949883] [2022-01-10 12:57:46,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:57:46,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:57:46,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:57:46,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:57:46,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:57:46,176 INFO L87 Difference]: Start difference. First operand has 314 states, 312 states have (on average 1.7884615384615385) internal successors, (558), 313 states have internal predecessors, (558), 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 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2022-01-10 12:57:48,290 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 12:57:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:57:48,512 INFO L93 Difference]: Finished difference Result 577 states and 997 transitions. [2022-01-10 12:57:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:57:48,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 98 [2022-01-10 12:57:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:57:48,527 INFO L225 Difference]: With dead ends: 577 [2022-01-10 12:57:48,527 INFO L226 Difference]: Without dead ends: 434 [2022-01-10 12:57:48,530 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 [2022-01-10 12:57:48,533 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 220 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 12:57:48,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 1051 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 12:57:48,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-01-10 12:57:48,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 431. [2022-01-10 12:57:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 1.6790697674418604) internal successors, (722), 430 states have internal predecessors, (722), 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) [2022-01-10 12:57:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 722 transitions. [2022-01-10 12:57:48,591 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 722 transitions. Word has length 98 [2022-01-10 12:57:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:57:48,592 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 722 transitions. [2022-01-10 12:57:48,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2022-01-10 12:57:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 722 transitions. [2022-01-10 12:57:48,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-10 12:57:48,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:57:48,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:57:48,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:57:48,600 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:57:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:57:48,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1885611638, now seen corresponding path program 1 times [2022-01-10 12:57:48,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:57:48,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26863098] [2022-01-10 12:57:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:57:48,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:57:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:57:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:57:48,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:57:48,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26863098] [2022-01-10 12:57:48,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26863098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:57:48,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:57:48,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:57:48,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145872506] [2022-01-10 12:57:48,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:57:48,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:57:48,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:57:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:57:48,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:57:48,935 INFO L87 Difference]: Start difference. First operand 431 states and 722 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2022-01-10 12:57:49,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:57:49,120 INFO L93 Difference]: Finished difference Result 1227 states and 2049 transitions. [2022-01-10 12:57:49,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 12:57:49,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 101 [2022-01-10 12:57:49,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:57:49,128 INFO L225 Difference]: With dead ends: 1227 [2022-01-10 12:57:49,128 INFO L226 Difference]: Without dead ends: 843 [2022-01-10 12:57:49,132 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 [2022-01-10 12:57:49,133 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 1412 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:57:49,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 1028 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:57:49,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-01-10 12:57:49,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 841. [2022-01-10 12:57:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.6702380952380953) internal successors, (1403), 840 states have internal predecessors, (1403), 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) [2022-01-10 12:57:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1403 transitions. [2022-01-10 12:57:49,206 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1403 transitions. Word has length 101 [2022-01-10 12:57:49,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:57:49,207 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1403 transitions. [2022-01-10 12:57:49,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2022-01-10 12:57:49,208 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1403 transitions. [2022-01-10 12:57:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 12:57:49,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:57:49,218 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:57:49,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 12:57:49,224 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:57:49,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:57:49,225 INFO L85 PathProgramCache]: Analyzing trace with hash 23462841, now seen corresponding path program 1 times [2022-01-10 12:57:49,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:57:49,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274276075] [2022-01-10 12:57:49,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:57:49,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:57:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:57:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:57:49,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:57:49,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274276075] [2022-01-10 12:57:49,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274276075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:57:49,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:57:49,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:57:49,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545273170] [2022-01-10 12:57:49,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:57:49,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:57:49,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:57:49,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:57:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:57:49,417 INFO L87 Difference]: Start difference. First operand 841 states and 1403 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2022-01-10 12:57:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:57:49,488 INFO L93 Difference]: Finished difference Result 1315 states and 2208 transitions. [2022-01-10 12:57:49,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:57:49,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 103 [2022-01-10 12:57:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:57:49,513 INFO L225 Difference]: With dead ends: 1315 [2022-01-10 12:57:49,513 INFO L226 Difference]: Without dead ends: 1052 [2022-01-10 12:57:49,519 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 [2022-01-10 12:57:49,525 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 205 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:57:49,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1180 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:57:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-01-10 12:57:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1050. [2022-01-10 12:57:49,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 1.6758817921830313) internal successors, (1758), 1049 states have internal predecessors, (1758), 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) [2022-01-10 12:57:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1758 transitions. [2022-01-10 12:57:49,589 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1758 transitions. Word has length 103 [2022-01-10 12:57:49,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:57:49,589 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1758 transitions. [2022-01-10 12:57:49,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2022-01-10 12:57:49,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1758 transitions. [2022-01-10 12:57:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 12:57:49,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:57:49,596 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:57:49,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 12:57:49,596 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:57:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:57:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1359669679, now seen corresponding path program 1 times [2022-01-10 12:57:49,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:57:49,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246996535] [2022-01-10 12:57:49,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:57:49,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:57:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:57:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:57:49,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:57:49,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246996535] [2022-01-10 12:57:49,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246996535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:57:49,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:57:49,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:57:49,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042940016] [2022-01-10 12:57:49,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:57:49,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:57:49,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:57:49,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:57:49,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:57:49,822 INFO L87 Difference]: Start difference. First operand 1050 states and 1758 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2022-01-10 12:57:50,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:57:50,160 INFO L93 Difference]: Finished difference Result 4097 states and 6851 transitions. [2022-01-10 12:57:50,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:57:50,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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 103 [2022-01-10 12:57:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:57:50,174 INFO L225 Difference]: With dead ends: 4097 [2022-01-10 12:57:50,175 INFO L226 Difference]: Without dead ends: 3059 [2022-01-10 12:57:50,177 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 [2022-01-10 12:57:50,182 INFO L933 BasicCegarLoop]: 731 mSDtfsCounter, 1402 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 2173 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:57:50,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1402 Valid, 2173 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:57:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3059 states. [2022-01-10 12:57:50,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3059 to 2060. [2022-01-10 12:57:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 1.6653715395823214) internal successors, (3429), 2059 states have internal predecessors, (3429), 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) [2022-01-10 12:57:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 3429 transitions. [2022-01-10 12:57:50,351 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 3429 transitions. Word has length 103 [2022-01-10 12:57:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:57:50,352 INFO L470 AbstractCegarLoop]: Abstraction has 2060 states and 3429 transitions. [2022-01-10 12:57:50,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2022-01-10 12:57:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 3429 transitions. [2022-01-10 12:57:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-10 12:57:50,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:57:50,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:57:50,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 12:57:50,355 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:57:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:57:50,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1600139910, now seen corresponding path program 1 times [2022-01-10 12:57:50,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:57:50,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879614937] [2022-01-10 12:57:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:57:50,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:57:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:57:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:57:50,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:57:50,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879614937] [2022-01-10 12:57:50,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879614937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:57:50,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:57:50,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:57:50,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112777351] [2022-01-10 12:57:50,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:57:50,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:57:50,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:57:50,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:57:50,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:57:50,432 INFO L87 Difference]: Start difference. First operand 2060 states and 3429 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2022-01-10 12:57:50,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:57:50,688 INFO L93 Difference]: Finished difference Result 6123 states and 10189 transitions. [2022-01-10 12:57:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:57:50,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 105 [2022-01-10 12:57:50,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:57:50,705 INFO L225 Difference]: With dead ends: 6123 [2022-01-10 12:57:50,706 INFO L226 Difference]: Without dead ends: 4092 [2022-01-10 12:57:50,710 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 [2022-01-10 12:57:50,711 INFO L933 BasicCegarLoop]: 1022 mSDtfsCounter, 502 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:57:50,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 1531 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:57:50,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2022-01-10 12:57:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 2074. [2022-01-10 12:57:50,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 1.6623251326579835) internal successors, (3446), 2073 states have internal predecessors, (3446), 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) [2022-01-10 12:57:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3446 transitions. [2022-01-10 12:57:50,890 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3446 transitions. Word has length 105 [2022-01-10 12:57:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:57:50,893 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 3446 transitions. [2022-01-10 12:57:50,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2022-01-10 12:57:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3446 transitions. [2022-01-10 12:57:50,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 12:57:50,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:57:50,898 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:57:50,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 12:57:50,898 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:57:50,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:57:50,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1376927051, now seen corresponding path program 1 times [2022-01-10 12:57:50,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:57:50,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015460317] [2022-01-10 12:57:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:57:50,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:57:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:57:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:57:51,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:57:51,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015460317] [2022-01-10 12:57:51,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015460317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:57:51,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:57:51,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:57:51,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402559918] [2022-01-10 12:57:51,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:57:51,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:57:51,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:57:51,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:57:51,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:57:51,115 INFO L87 Difference]: Start difference. First operand 2074 states and 3446 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2022-01-10 12:57:51,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:57:51,531 INFO L93 Difference]: Finished difference Result 6025 states and 10010 transitions. [2022-01-10 12:57:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 12:57:51,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 106 [2022-01-10 12:57:51,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:57:51,548 INFO L225 Difference]: With dead ends: 6025 [2022-01-10 12:57:51,548 INFO L226 Difference]: Without dead ends: 4071 [2022-01-10 12:57:51,553 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 [2022-01-10 12:57:51,555 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 1218 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:57:51,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 1211 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:57:51,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2022-01-10 12:57:51,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 4069. [2022-01-10 12:57:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4069 states, 4068 states have (on average 1.6543756145526056) internal successors, (6730), 4068 states have internal predecessors, (6730), 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) [2022-01-10 12:57:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 6730 transitions. [2022-01-10 12:57:51,936 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 6730 transitions. Word has length 106 [2022-01-10 12:57:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:57:51,937 INFO L470 AbstractCegarLoop]: Abstraction has 4069 states and 6730 transitions. [2022-01-10 12:57:51,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2022-01-10 12:57:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 6730 transitions. [2022-01-10 12:57:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 12:57:51,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:57:51,943 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:57:51,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 12:57:51,943 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:57:51,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:57:51,944 INFO L85 PathProgramCache]: Analyzing trace with hash 168848835, now seen corresponding path program 1 times [2022-01-10 12:57:51,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:57:51,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732510170] [2022-01-10 12:57:51,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:57:51,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:57:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:57:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:57:52,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:57:52,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732510170] [2022-01-10 12:57:52,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732510170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:57:52,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:57:52,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:57:52,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043676320] [2022-01-10 12:57:52,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:57:52,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:57:52,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:57:52,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:57:52,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:57:52,045 INFO L87 Difference]: Start difference. First operand 4069 states and 6730 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2022-01-10 12:57:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:57:52,989 INFO L93 Difference]: Finished difference Result 14187 states and 23327 transitions. [2022-01-10 12:57:52,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:57:52,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 107 [2022-01-10 12:57:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:57:53,031 INFO L225 Difference]: With dead ends: 14187 [2022-01-10 12:57:53,031 INFO L226 Difference]: Without dead ends: 10677 [2022-01-10 12:57:53,040 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 [2022-01-10 12:57:53,040 INFO L933 BasicCegarLoop]: 1187 mSDtfsCounter, 1182 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 2576 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 [2022-01-10 12:57:53,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1182 Valid, 2576 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:57:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2022-01-10 12:57:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 4557. [2022-01-10 12:57:53,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4556 states have (on average 1.6589113257243195) internal successors, (7558), 4556 states have internal predecessors, (7558), 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) [2022-01-10 12:57:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 7558 transitions. [2022-01-10 12:57:53,595 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 7558 transitions. Word has length 107 [2022-01-10 12:57:53,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:57:53,595 INFO L470 AbstractCegarLoop]: Abstraction has 4557 states and 7558 transitions. [2022-01-10 12:57:53,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2022-01-10 12:57:53,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 7558 transitions. [2022-01-10 12:57:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-10 12:57:53,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:57:53,601 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:57:53,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 12:57:53,602 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:57:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:57:53,602 INFO L85 PathProgramCache]: Analyzing trace with hash -282876050, now seen corresponding path program 1 times [2022-01-10 12:57:53,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:57:53,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066722881] [2022-01-10 12:57:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:57:53,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:57:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:57:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:57:53,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:57:53,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066722881] [2022-01-10 12:57:53,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066722881] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:57:53,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:57:53,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:57:53,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972889458] [2022-01-10 12:57:53,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:57:53,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:57:53,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:57:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:57:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:57:53,816 INFO L87 Difference]: Start difference. First operand 4557 states and 7558 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2022-01-10 12:57:55,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 12:57:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:57:56,683 INFO L93 Difference]: Finished difference Result 9789 states and 16268 transitions. [2022-01-10 12:57:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:57:56,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 108 [2022-01-10 12:57:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:57:56,715 INFO L225 Difference]: With dead ends: 9789 [2022-01-10 12:57:56,715 INFO L226 Difference]: Without dead ends: 7071 [2022-01-10 12:57:56,723 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 [2022-01-10 12:57:56,723 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 197 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 12:57:56,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1026 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 12:57:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7071 states. [2022-01-10 12:57:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7071 to 7045. [2022-01-10 12:57:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7045 states, 7044 states have (on average 1.654457694491766) internal successors, (11654), 7044 states have internal predecessors, (11654), 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) [2022-01-10 12:57:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7045 states to 7045 states and 11654 transitions. [2022-01-10 12:57:57,391 INFO L78 Accepts]: Start accepts. Automaton has 7045 states and 11654 transitions. Word has length 108 [2022-01-10 12:57:57,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:57:57,391 INFO L470 AbstractCegarLoop]: Abstraction has 7045 states and 11654 transitions. [2022-01-10 12:57:57,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2022-01-10 12:57:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 7045 states and 11654 transitions. [2022-01-10 12:57:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 12:57:57,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:57:57,399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:57:57,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 12:57:57,399 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:57:57,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:57:57,400 INFO L85 PathProgramCache]: Analyzing trace with hash -966697379, now seen corresponding path program 1 times [2022-01-10 12:57:57,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:57:57,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266952978] [2022-01-10 12:57:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:57:57,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:57:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:57:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:57:57,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:57:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266952978] [2022-01-10 12:57:57,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266952978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:57:57,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:57:57,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:57:57,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137499680] [2022-01-10 12:57:57,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:57:57,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:57:57,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:57:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:57:57,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:57:57,534 INFO L87 Difference]: Start difference. First operand 7045 states and 11654 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2022-01-10 12:57:58,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:57:58,566 INFO L93 Difference]: Finished difference Result 19343 states and 31869 transitions. [2022-01-10 12:57:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:57:58,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 111 [2022-01-10 12:57:58,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:57:58,601 INFO L225 Difference]: With dead ends: 19343 [2022-01-10 12:57:58,601 INFO L226 Difference]: Without dead ends: 13359 [2022-01-10 12:57:58,613 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 [2022-01-10 12:57:58,614 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 400 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:57:58,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 1452 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:57:58,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13359 states. [2022-01-10 12:57:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13359 to 13357. [2022-01-10 12:57:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13357 states, 13356 states have (on average 1.6431566337226715) internal successors, (21946), 13356 states have internal predecessors, (21946), 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) [2022-01-10 12:57:59,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13357 states to 13357 states and 21946 transitions. [2022-01-10 12:57:59,785 INFO L78 Accepts]: Start accepts. Automaton has 13357 states and 21946 transitions. Word has length 111 [2022-01-10 12:57:59,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:57:59,786 INFO L470 AbstractCegarLoop]: Abstraction has 13357 states and 21946 transitions. [2022-01-10 12:57:59,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2022-01-10 12:57:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 13357 states and 21946 transitions. [2022-01-10 12:57:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 12:57:59,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:57:59,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:57:59,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 12:57:59,799 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:57:59,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:57:59,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1046807679, now seen corresponding path program 1 times [2022-01-10 12:57:59,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:57:59,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705127084] [2022-01-10 12:57:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:57:59,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:57:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:57:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:57:59,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:57:59,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705127084] [2022-01-10 12:57:59,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705127084] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:57:59,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:57:59,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:57:59,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14397762] [2022-01-10 12:57:59,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:57:59,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:57:59,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:57:59,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:57:59,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:57:59,864 INFO L87 Difference]: Start difference. First operand 13357 states and 21946 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2022-01-10 12:58:01,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:58:01,064 INFO L93 Difference]: Finished difference Result 26542 states and 43494 transitions. [2022-01-10 12:58:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:58:01,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 111 [2022-01-10 12:58:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:58:01,107 INFO L225 Difference]: With dead ends: 26542 [2022-01-10 12:58:01,107 INFO L226 Difference]: Without dead ends: 19577 [2022-01-10 12:58:01,124 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 [2022-01-10 12:58:01,125 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 502 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:58:01,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 1044 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:58:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19577 states. [2022-01-10 12:58:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19577 to 13357. [2022-01-10 12:58:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13357 states, 13356 states have (on average 1.64240790655885) internal successors, (21936), 13356 states have internal predecessors, (21936), 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) [2022-01-10 12:58:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13357 states to 13357 states and 21936 transitions. [2022-01-10 12:58:02,198 INFO L78 Accepts]: Start accepts. Automaton has 13357 states and 21936 transitions. Word has length 111 [2022-01-10 12:58:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:58:02,199 INFO L470 AbstractCegarLoop]: Abstraction has 13357 states and 21936 transitions. [2022-01-10 12:58:02,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2022-01-10 12:58:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 13357 states and 21936 transitions. [2022-01-10 12:58:02,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 12:58:02,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:58:02,212 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:58:02,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 12:58:02,212 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:58:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:58:02,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1873602983, now seen corresponding path program 1 times [2022-01-10 12:58:02,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:58:02,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454197127] [2022-01-10 12:58:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:58:02,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:58:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:58:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:58:02,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:58:02,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454197127] [2022-01-10 12:58:02,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454197127] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:58:02,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:58:02,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:58:02,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48323338] [2022-01-10 12:58:02,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:58:02,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:58:02,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:58:02,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:58:02,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:58:02,336 INFO L87 Difference]: Start difference. First operand 13357 states and 21936 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2022-01-10 12:58:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:58:04,416 INFO L93 Difference]: Finished difference Result 36886 states and 60471 transitions. [2022-01-10 12:58:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 12:58:04,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 112 [2022-01-10 12:58:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:58:04,461 INFO L225 Difference]: With dead ends: 36886 [2022-01-10 12:58:04,462 INFO L226 Difference]: Without dead ends: 23876 [2022-01-10 12:58:04,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:58:04,484 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 985 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:58:04,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [985 Valid, 1333 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:58:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23876 states. [2022-01-10 12:58:05,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23876 to 13572. [2022-01-10 12:58:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13572 states, 13571 states have (on average 1.6403360106108613) internal successors, (22261), 13571 states have internal predecessors, (22261), 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) [2022-01-10 12:58:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13572 states to 13572 states and 22261 transitions. [2022-01-10 12:58:05,667 INFO L78 Accepts]: Start accepts. Automaton has 13572 states and 22261 transitions. Word has length 112 [2022-01-10 12:58:05,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:58:05,667 INFO L470 AbstractCegarLoop]: Abstraction has 13572 states and 22261 transitions. [2022-01-10 12:58:05,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2022-01-10 12:58:05,667 INFO L276 IsEmpty]: Start isEmpty. Operand 13572 states and 22261 transitions. [2022-01-10 12:58:05,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 12:58:05,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:58:05,678 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:58:05,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 12:58:05,678 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:58:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:58:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1959021653, now seen corresponding path program 1 times [2022-01-10 12:58:05,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:58:05,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087623299] [2022-01-10 12:58:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:58:05,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:58:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:58:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:58:05,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:58:05,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087623299] [2022-01-10 12:58:05,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087623299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:58:05,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:58:05,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:58:05,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349754218] [2022-01-10 12:58:05,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:58:05,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:58:05,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:58:05,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:58:05,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:58:05,834 INFO L87 Difference]: Start difference. First operand 13572 states and 22261 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2022-01-10 12:58:08,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:58:08,430 INFO L93 Difference]: Finished difference Result 38995 states and 63972 transitions. [2022-01-10 12:58:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 12:58:08,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 112 [2022-01-10 12:58:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:58:08,466 INFO L225 Difference]: With dead ends: 38995 [2022-01-10 12:58:08,466 INFO L226 Difference]: Without dead ends: 26287 [2022-01-10 12:58:08,484 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 [2022-01-10 12:58:08,485 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 1332 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1332 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:58:08,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1332 Valid, 1028 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:58:08,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26287 states. [2022-01-10 12:58:10,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26287 to 26285. [2022-01-10 12:58:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26285 states, 26284 states have (on average 1.633997869426267) internal successors, (42948), 26284 states have internal predecessors, (42948), 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) [2022-01-10 12:58:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26285 states to 26285 states and 42948 transitions. [2022-01-10 12:58:10,987 INFO L78 Accepts]: Start accepts. Automaton has 26285 states and 42948 transitions. Word has length 112 [2022-01-10 12:58:10,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:58:10,987 INFO L470 AbstractCegarLoop]: Abstraction has 26285 states and 42948 transitions. [2022-01-10 12:58:10,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2022-01-10 12:58:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 26285 states and 42948 transitions. [2022-01-10 12:58:11,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 12:58:11,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:58:11,009 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:58:11,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 12:58:11,010 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:58:11,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:58:11,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1020459782, now seen corresponding path program 1 times [2022-01-10 12:58:11,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:58:11,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603534107] [2022-01-10 12:58:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:58:11,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:58:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:58:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:58:11,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:58:11,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603534107] [2022-01-10 12:58:11,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603534107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:58:11,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:58:11,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:58:11,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955248375] [2022-01-10 12:58:11,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:58:11,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:58:11,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:58:11,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:58:11,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:58:11,144 INFO L87 Difference]: Start difference. First operand 26285 states and 42948 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2022-01-10 12:58:14,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:58:14,010 INFO L93 Difference]: Finished difference Result 45281 states and 74438 transitions. [2022-01-10 12:58:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:58:14,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 114 [2022-01-10 12:58:14,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:58:14,060 INFO L225 Difference]: With dead ends: 45281 [2022-01-10 12:58:14,060 INFO L226 Difference]: Without dead ends: 34831 [2022-01-10 12:58:14,077 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 [2022-01-10 12:58:14,078 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 196 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:58:14,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 1162 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:58:14,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34831 states. [2022-01-10 12:58:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34831 to 34829. [2022-01-10 12:58:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34829 states, 34828 states have (on average 1.6360399678419661) internal successors, (56980), 34828 states have internal predecessors, (56980), 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) [2022-01-10 12:58:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34829 states to 34829 states and 56980 transitions. [2022-01-10 12:58:17,260 INFO L78 Accepts]: Start accepts. Automaton has 34829 states and 56980 transitions. Word has length 114 [2022-01-10 12:58:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:58:17,260 INFO L470 AbstractCegarLoop]: Abstraction has 34829 states and 56980 transitions. [2022-01-10 12:58:17,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2022-01-10 12:58:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 34829 states and 56980 transitions. [2022-01-10 12:58:17,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 12:58:17,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:58:17,277 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:58:17,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 12:58:17,277 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:58:17,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:58:17,278 INFO L85 PathProgramCache]: Analyzing trace with hash 345322606, now seen corresponding path program 1 times [2022-01-10 12:58:17,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:58:17,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199074037] [2022-01-10 12:58:17,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:58:17,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:58:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:58:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:58:17,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:58:17,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199074037] [2022-01-10 12:58:17,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199074037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:58:17,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:58:17,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:58:17,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693616092] [2022-01-10 12:58:17,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:58:17,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:58:17,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:58:17,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:58:17,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:58:17,417 INFO L87 Difference]: Start difference. First operand 34829 states and 56980 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2022-01-10 12:58:23,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:58:23,388 INFO L93 Difference]: Finished difference Result 99746 states and 162950 transitions. [2022-01-10 12:58:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:58:23,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 114 [2022-01-10 12:58:23,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:58:23,517 INFO L225 Difference]: With dead ends: 99746 [2022-01-10 12:58:23,517 INFO L226 Difference]: Without dead ends: 67680 [2022-01-10 12:58:23,564 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 [2022-01-10 12:58:23,565 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 388 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:58:23,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 1472 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:58:23,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67680 states. [2022-01-10 12:58:29,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67680 to 67678. [2022-01-10 12:58:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67678 states, 67677 states have (on average 1.6268156094389528) internal successors, (110098), 67677 states have internal predecessors, (110098), 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) [2022-01-10 12:58:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67678 states to 67678 states and 110098 transitions. [2022-01-10 12:58:30,017 INFO L78 Accepts]: Start accepts. Automaton has 67678 states and 110098 transitions. Word has length 114 [2022-01-10 12:58:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:58:30,017 INFO L470 AbstractCegarLoop]: Abstraction has 67678 states and 110098 transitions. [2022-01-10 12:58:30,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2022-01-10 12:58:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 67678 states and 110098 transitions. [2022-01-10 12:58:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 12:58:30,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:58:30,052 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:58:30,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 12:58:30,052 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:58:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:58:30,053 INFO L85 PathProgramCache]: Analyzing trace with hash -625647812, now seen corresponding path program 1 times [2022-01-10 12:58:30,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:58:30,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125863223] [2022-01-10 12:58:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:58:30,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:58:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:58:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:58:30,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:58:30,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125863223] [2022-01-10 12:58:30,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125863223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:58:30,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:58:30,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:58:30,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141007105] [2022-01-10 12:58:30,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:58:30,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:58:30,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:58:30,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:58:30,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:58:30,261 INFO L87 Difference]: Start difference. First operand 67678 states and 110098 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 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) [2022-01-10 12:58:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:58:40,991 INFO L93 Difference]: Finished difference Result 172953 states and 280501 transitions. [2022-01-10 12:58:40,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:58:40,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 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 114 [2022-01-10 12:58:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:58:41,205 INFO L225 Difference]: With dead ends: 172953 [2022-01-10 12:58:41,205 INFO L226 Difference]: Without dead ends: 106592 [2022-01-10 12:58:41,271 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 [2022-01-10 12:58:41,272 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 1399 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 2150 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:58:41,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1399 Valid, 2150 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:58:41,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106592 states.