/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_LAZY.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:59:01,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:59:01,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:59:01,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:59:01,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:59:01,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:59:01,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:59:01,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:59:01,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:59:01,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:59:01,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:59:01,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:59:01,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:59:01,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:59:01,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:59:01,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:59:01,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:59:01,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:59:01,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:59:01,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:59:01,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:59:01,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:59:01,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:59:01,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:59:01,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:59:01,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:59:01,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:59:01,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:59:01,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:59:01,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:59:01,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:59:01,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:59:01,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:59:01,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:59:01,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:59:01,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:59:01,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:59:01,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:59:01,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:59:01,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:59:01,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:59:01,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:59:01,573 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:59:01,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:59:01,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:59:01,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:59:01,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:59:01,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:59:01,575 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:59:01,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:59:01,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:59:01,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:59:01,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:59:01,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:59:01,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:59:01,576 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:59:01,576 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:59:01,576 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:59:01,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:59:01,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:59:01,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:59:01,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:59:01,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:59:01,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:59:01,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:59:01,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:59:01,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:59:01,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:59:01,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:59:01,578 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:59:01,578 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:59:01,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:59:01,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:59:01,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:59:01,579 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:59:01,579 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:59:01,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:59:01,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:59:01,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:59:01,835 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:59:01,835 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:59:01,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-01-10 18:59:01,892 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55f1444e6/ad6a269ec56945d6a24ed90a17f7cdba/FLAGa79325ab9 [2022-01-10 18:59:02,289 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:59:02,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-01-10 18:59:02,302 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55f1444e6/ad6a269ec56945d6a24ed90a17f7cdba/FLAGa79325ab9 [2022-01-10 18:59:02,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55f1444e6/ad6a269ec56945d6a24ed90a17f7cdba [2022-01-10 18:59:02,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:59:02,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:59:02,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:59:02,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:59:02,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:59:02,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:59:02" (1/1) ... [2022-01-10 18:59:02,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a86be6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:02, skipping insertion in model container [2022-01-10 18:59:02,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:59:02" (1/1) ... [2022-01-10 18:59:02,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:59:02,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:59:02,545 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_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6876,6889] [2022-01-10 18:59:02,555 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_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9071,9084] [2022-01-10 18:59:02,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:59:02,580 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:59:02,644 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_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6876,6889] [2022-01-10 18:59:02,650 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_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9071,9084] [2022-01-10 18:59:02,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:59:02,686 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:59:02,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:02 WrapperNode [2022-01-10 18:59:02,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:59:02,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:59:02,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:59:02,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:59:02,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:02" (1/1) ... [2022-01-10 18:59:02,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:02" (1/1) ... [2022-01-10 18:59:02,728 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 438 [2022-01-10 18:59:02,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:59:02,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:59:02,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:59:02,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:59:02,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:02" (1/1) ... [2022-01-10 18:59:02,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:02" (1/1) ... [2022-01-10 18:59:02,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:02" (1/1) ... [2022-01-10 18:59:02,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:02" (1/1) ... [2022-01-10 18:59:02,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:02" (1/1) ... [2022-01-10 18:59:02,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:02" (1/1) ... [2022-01-10 18:59:02,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:02" (1/1) ... [2022-01-10 18:59:02,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:59:02,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:59:02,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:59:02,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:59:02,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:02" (1/1) ... [2022-01-10 18:59:02,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:59:02,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:59:02,792 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 18:59:02,842 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 18:59:02,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:59:02,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:59:02,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:59:02,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:59:02,966 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:59:02,967 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:59:03,326 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:59:03,332 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:59:03,332 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:59:03,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:59:03 BoogieIcfgContainer [2022-01-10 18:59:03,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:59:03,335 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:59:03,335 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:59:03,338 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:59:03,341 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:59:03" (1/1) ... [2022-01-10 18:59:03,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:59:03 BasicIcfg [2022-01-10 18:59:03,731 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:59:03,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:59:03,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:59:03,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:59:03,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:59:02" (1/4) ... [2022-01-10 18:59:03,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0979ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:59:03, skipping insertion in model container [2022-01-10 18:59:03,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:02" (2/4) ... [2022-01-10 18:59:03,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0979ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:59:03, skipping insertion in model container [2022-01-10 18:59:03,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:59:03" (3/4) ... [2022-01-10 18:59:03,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0979ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:59:03, skipping insertion in model container [2022-01-10 18:59:03,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:59:03" (4/4) ... [2022-01-10 18:59:03,740 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.cTransformedIcfg [2022-01-10 18:59:03,744 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:59:03,744 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 18:59:03,791 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:59:03,799 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 18:59:03,800 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 18:59:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 105 states have internal predecessors, (180), 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 18:59:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 18:59:03,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:59:03,823 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] [2022-01-10 18:59:03,824 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:59:03,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:59:03,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1394518683, now seen corresponding path program 1 times [2022-01-10 18:59:03,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:59:03,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938738165] [2022-01-10 18:59:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:59:03,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:59:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:59:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:59:04,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:59:04,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938738165] [2022-01-10 18:59:04,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938738165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:59:04,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:59:04,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:59:04,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247367745] [2022-01-10 18:59:04,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:59:04,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:59:04,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:59:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:59:04,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:59:04,357 INFO L87 Difference]: Start difference. First operand has 106 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 105 states have internal predecessors, (180), 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 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 18:59:04,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:59:04,962 INFO L93 Difference]: Finished difference Result 206 states and 333 transitions. [2022-01-10 18:59:04,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:59:04,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2022-01-10 18:59:04,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:59:04,973 INFO L225 Difference]: With dead ends: 206 [2022-01-10 18:59:04,973 INFO L226 Difference]: Without dead ends: 154 [2022-01-10 18:59:04,981 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 18:59:04,984 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 96 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 18:59:04,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 350 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 18:59:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-10 18:59:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2022-01-10 18:59:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 150 states have (on average 1.4333333333333333) internal successors, (215), 151 states have internal predecessors, (215), 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 18:59:05,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 215 transitions. [2022-01-10 18:59:05,074 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 215 transitions. Word has length 47 [2022-01-10 18:59:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:59:05,075 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 215 transitions. [2022-01-10 18:59:05,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 18:59:05,076 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 215 transitions. [2022-01-10 18:59:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 18:59:05,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:59:05,078 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] [2022-01-10 18:59:05,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:59:05,078 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:59:05,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:59:05,082 INFO L85 PathProgramCache]: Analyzing trace with hash -281360002, now seen corresponding path program 1 times [2022-01-10 18:59:05,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:59:05,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579089616] [2022-01-10 18:59:05,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:59:05,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:59:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:59:05,274 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 18:59:05,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:59:05,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579089616] [2022-01-10 18:59:05,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579089616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:59:05,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:59:05,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:59:05,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436929081] [2022-01-10 18:59:05,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:59:05,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:59:05,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:59:05,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:59:05,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:59:05,282 INFO L87 Difference]: Start difference. First operand 152 states and 215 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 18:59:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:59:05,500 INFO L93 Difference]: Finished difference Result 280 states and 410 transitions. [2022-01-10 18:59:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:59:05,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2022-01-10 18:59:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:59:05,504 INFO L225 Difference]: With dead ends: 280 [2022-01-10 18:59:05,504 INFO L226 Difference]: Without dead ends: 197 [2022-01-10 18:59:05,505 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 18:59:05,506 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 75 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 18:59:05,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 305 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 18:59:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-10 18:59:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-01-10 18:59:05,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 1.450777202072539) internal successors, (280), 194 states have internal predecessors, (280), 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 18:59:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 280 transitions. [2022-01-10 18:59:05,536 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 280 transitions. Word has length 48 [2022-01-10 18:59:05,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:59:05,536 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 280 transitions. [2022-01-10 18:59:05,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 18:59:05,538 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 280 transitions. [2022-01-10 18:59:05,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-10 18:59:05,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:59:05,543 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] [2022-01-10 18:59:05,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:59:05,548 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:59:05,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:59:05,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1335203516, now seen corresponding path program 1 times [2022-01-10 18:59:05,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:59:05,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291394462] [2022-01-10 18:59:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:59:05,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:59:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:59:05,961 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 18:59:05,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:59:05,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291394462] [2022-01-10 18:59:05,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291394462] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:59:05,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:59:05,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 18:59:05,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988546604] [2022-01-10 18:59:05,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:59:05,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 18:59:05,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:59:05,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 18:59:05,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 18:59:05,964 INFO L87 Difference]: Start difference. First operand 195 states and 280 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 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 18:59:08,414 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 18:59:10,555 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:14,247 WARN L534 Checker$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 18:59:16,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:18,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:20,720 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:23,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.97s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:25,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:28,657 WARN L534 Checker$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 18:59:28,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:59:28,994 INFO L93 Difference]: Finished difference Result 1444 states and 2165 transitions. [2022-01-10 18:59:28,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 18:59:28,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 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 49 [2022-01-10 18:59:28,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:59:29,002 INFO L225 Difference]: With dead ends: 1444 [2022-01-10 18:59:29,002 INFO L226 Difference]: Without dead ends: 1275 [2022-01-10 18:59:29,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-01-10 18:59:29,008 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 708 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 15 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:59:29,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 1042 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 465 Invalid, 9 Unknown, 0 Unchecked, 22.3s Time] [2022-01-10 18:59:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-01-10 18:59:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 538. [2022-01-10 18:59:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 536 states have (on average 1.4906716417910448) internal successors, (799), 537 states have internal predecessors, (799), 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 18:59:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 799 transitions. [2022-01-10 18:59:29,223 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 799 transitions. Word has length 49 [2022-01-10 18:59:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:59:29,225 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 799 transitions. [2022-01-10 18:59:29,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 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 18:59:29,225 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 799 transitions. [2022-01-10 18:59:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 18:59:29,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:59:29,230 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] [2022-01-10 18:59:29,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 18:59:29,231 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:59:29,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:59:29,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1436670939, now seen corresponding path program 1 times [2022-01-10 18:59:29,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:59:29,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255864200] [2022-01-10 18:59:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:59:29,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:59:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:59:29,620 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 18:59:29,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:59:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255864200] [2022-01-10 18:59:29,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255864200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:59:29,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:59:29,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 18:59:29,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475793510] [2022-01-10 18:59:29,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:59:29,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 18:59:29,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:59:29,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 18:59:29,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 18:59:29,622 INFO L87 Difference]: Start difference. First operand 538 states and 799 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 18:59:32,914 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:35,157 WARN L534 Checker$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 18:59:37,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:40,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:59:40,464 INFO L93 Difference]: Finished difference Result 4116 states and 6225 transitions. [2022-01-10 18:59:40,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:59:40,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 50 [2022-01-10 18:59:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:59:40,479 INFO L225 Difference]: With dead ends: 4116 [2022-01-10 18:59:40,479 INFO L226 Difference]: Without dead ends: 3611 [2022-01-10 18:59:40,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-01-10 18:59:40,481 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 891 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-01-10 18:59:40,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 875 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 480 Invalid, 3 Unknown, 0 Unchecked, 8.8s Time] [2022-01-10 18:59:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2022-01-10 18:59:41,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 1469. [2022-01-10 18:59:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1467 states have (on average 1.4969325153374233) internal successors, (2196), 1468 states have internal predecessors, (2196), 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 18:59:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 2196 transitions. [2022-01-10 18:59:41,108 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 2196 transitions. Word has length 50 [2022-01-10 18:59:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:59:41,109 INFO L470 AbstractCegarLoop]: Abstraction has 1469 states and 2196 transitions. [2022-01-10 18:59:41,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 18:59:41,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 2196 transitions. [2022-01-10 18:59:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 18:59:41,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:59:41,112 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] [2022-01-10 18:59:41,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 18:59:41,112 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:59:41,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:59:41,113 INFO L85 PathProgramCache]: Analyzing trace with hash -977616102, now seen corresponding path program 1 times [2022-01-10 18:59:41,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:59:41,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154818949] [2022-01-10 18:59:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:59:41,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:59:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:59:41,499 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 18:59:41,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:59:41,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154818949] [2022-01-10 18:59:41,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154818949] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:59:41,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:59:41,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 18:59:41,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590410154] [2022-01-10 18:59:41,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:59:41,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 18:59:41,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:59:41,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 18:59:41,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 18:59:41,501 INFO L87 Difference]: Start difference. First operand 1469 states and 2196 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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 18:59:44,010 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 18:59:48,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:50,456 WARN L534 Checker$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 18:59:52,586 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:54,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:56,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:01,074 WARN L534 Checker$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 19:00:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:00:02,045 INFO L93 Difference]: Finished difference Result 7970 states and 12078 transitions. [2022-01-10 19:00:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 19:00:02,046 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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 50 [2022-01-10 19:00:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:00:02,066 INFO L225 Difference]: With dead ends: 7970 [2022-01-10 19:00:02,067 INFO L226 Difference]: Without dead ends: 6603 [2022-01-10 19:00:02,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-10 19:00:02,069 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 643 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 16 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2022-01-10 19:00:02,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 1086 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 536 Invalid, 7 Unknown, 0 Unchecked, 17.1s Time] [2022-01-10 19:00:02,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2022-01-10 19:00:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 1901. [2022-01-10 19:00:03,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1899 states have (on average 1.5023696682464456) internal successors, (2853), 1900 states have internal predecessors, (2853), 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 19:00:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 2853 transitions. [2022-01-10 19:00:03,027 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 2853 transitions. Word has length 50 [2022-01-10 19:00:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:00:03,027 INFO L470 AbstractCegarLoop]: Abstraction has 1901 states and 2853 transitions. [2022-01-10 19:00:03,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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 19:00:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 2853 transitions. [2022-01-10 19:00:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 19:00:03,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:00:03,028 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] [2022-01-10 19:00:03,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 19:00:03,028 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 19:00:03,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:00:03,029 INFO L85 PathProgramCache]: Analyzing trace with hash -948853917, now seen corresponding path program 1 times [2022-01-10 19:00:03,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:00:03,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103337901] [2022-01-10 19:00:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:00:03,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:00:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:00:03,342 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 19:00:03,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:00:03,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103337901] [2022-01-10 19:00:03,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103337901] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:00:03,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:00:03,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:00:03,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563163803] [2022-01-10 19:00:03,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:00:03,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 19:00:03,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:00:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 19:00:03,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:00:03,344 INFO L87 Difference]: Start difference. First operand 1901 states and 2853 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 19:00:05,639 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 19:00:06,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:00:06,370 INFO L93 Difference]: Finished difference Result 2787 states and 4179 transitions. [2022-01-10 19:00:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 19:00:06,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 51 [2022-01-10 19:00:06,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:00:06,373 INFO L225 Difference]: With dead ends: 2787 [2022-01-10 19:00:06,374 INFO L226 Difference]: Without dead ends: 989 [2022-01-10 19:00:06,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 19:00:06,376 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 504 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 19:00:06,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 146 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-01-10 19:00:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-01-10 19:00:06,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 980. [2022-01-10 19:00:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 978 states have (on average 1.4846625766871167) internal successors, (1452), 979 states have internal predecessors, (1452), 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 19:00:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1452 transitions. [2022-01-10 19:00:06,898 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1452 transitions. Word has length 51 [2022-01-10 19:00:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:00:06,898 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 1452 transitions. [2022-01-10 19:00:06,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 19:00:06,898 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1452 transitions. [2022-01-10 19:00:06,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 19:00:06,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:00:06,899 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] [2022-01-10 19:00:06,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 19:00:06,899 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 19:00:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:00:06,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1393106052, now seen corresponding path program 1 times [2022-01-10 19:00:06,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:00:06,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958138518] [2022-01-10 19:00:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:00:06,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:00:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:00:07,192 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 19:00:07,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:00:07,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958138518] [2022-01-10 19:00:07,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958138518] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:00:07,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:00:07,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:00:07,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092456118] [2022-01-10 19:00:07,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:00:07,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 19:00:07,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:00:07,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 19:00:07,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:00:07,194 INFO L87 Difference]: Start difference. First operand 980 states and 1452 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 19:00:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:00:08,094 INFO L93 Difference]: Finished difference Result 2171 states and 3243 transitions. [2022-01-10 19:00:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 19:00:08,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 51 [2022-01-10 19:00:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:00:08,098 INFO L225 Difference]: With dead ends: 2171 [2022-01-10 19:00:08,098 INFO L226 Difference]: Without dead ends: 1220 [2022-01-10 19:00:08,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 19:00:08,100 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 529 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 19:00:08,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 142 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 19:00:08,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-01-10 19:00:08,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 580. [2022-01-10 19:00:08,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 578 states have (on average 1.4740484429065743) internal successors, (852), 579 states have internal predecessors, (852), 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 19:00:08,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 852 transitions. [2022-01-10 19:00:08,414 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 852 transitions. Word has length 51 [2022-01-10 19:00:08,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:00:08,414 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 852 transitions. [2022-01-10 19:00:08,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 19:00:08,414 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 852 transitions. [2022-01-10 19:00:08,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 19:00:08,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:00:08,415 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] [2022-01-10 19:00:08,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 19:00:08,415 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 19:00:08,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:00:08,416 INFO L85 PathProgramCache]: Analyzing trace with hash -435348187, now seen corresponding path program 1 times [2022-01-10 19:00:08,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:00:08,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176929516] [2022-01-10 19:00:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:00:08,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:00:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:00:08,662 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 19:00:08,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:00:08,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176929516] [2022-01-10 19:00:08,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176929516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:00:08,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:00:08,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 19:00:08,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916503830] [2022-01-10 19:00:08,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:00:08,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 19:00:08,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:00:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 19:00:08,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 19:00:08,664 INFO L87 Difference]: Start difference. First operand 580 states and 852 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 19:00:11,534 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 []