/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 09:03:37,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 09:03:37,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 09:03:37,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 09:03:37,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 09:03:37,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 09:03:37,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 09:03:37,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 09:03:37,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 09:03:37,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 09:03:37,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 09:03:37,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 09:03:37,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 09:03:37,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 09:03:37,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 09:03:37,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 09:03:37,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 09:03:37,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 09:03:37,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 09:03:37,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 09:03:37,748 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 09:03:37,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 09:03:37,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 09:03:37,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 09:03:37,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 09:03:37,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 09:03:37,753 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 09:03:37,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 09:03:37,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 09:03:37,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 09:03:37,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 09:03:37,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 09:03:37,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 09:03:37,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 09:03:37,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 09:03:37,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 09:03:37,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 09:03:37,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 09:03:37,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 09:03:37,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 09:03:37,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 09:03:37,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 09:03:37,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 09:03:37,774 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 09:03:37,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 09:03:37,776 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 09:03:37,776 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 09:03:37,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 09:03:37,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 09:03:37,777 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 09:03:37,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 09:03:37,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 09:03:37,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 09:03:37,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 09:03:37,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 09:03:37,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 09:03:37,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 09:03:37,778 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 09:03:37,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 09:03:37,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 09:03:37,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 09:03:37,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 09:03:37,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:03:37,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 09:03:37,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 09:03:37,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 09:03:37,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 09:03:37,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 09:03:37,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 09:03:37,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 09:03:37,780 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 09:03:37,780 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 09:03:37,780 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 09:03:37,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 09:03:37,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 09:03:37,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 09:03:37,977 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 09:03:37,978 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 09:03:37,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-03-20 09:03:38,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd1418170/fb84d4b243174dd78ee7a23507aa21b0/FLAGd34e49946 [2022-03-20 09:03:38,325 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 09:03:38,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-03-20 09:03:38,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd1418170/fb84d4b243174dd78ee7a23507aa21b0/FLAGd34e49946 [2022-03-20 09:03:38,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd1418170/fb84d4b243174dd78ee7a23507aa21b0 [2022-03-20 09:03:38,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 09:03:38,804 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 09:03:38,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 09:03:38,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 09:03:38,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 09:03:38,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:03:38" (1/1) ... [2022-03-20 09:03:38,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c9e90b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:03:38, skipping insertion in model container [2022-03-20 09:03:38,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:03:38" (1/1) ... [2022-03-20 09:03:38,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 09:03:38,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 09:03:38,953 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c[373,386] [2022-03-20 09:03:38,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:03:38,967 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 09:03:38,974 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c[373,386] [2022-03-20 09:03:38,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:03:38,985 INFO L208 MainTranslator]: Completed translation [2022-03-20 09:03:38,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:03:38 WrapperNode [2022-03-20 09:03:38,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 09:03:38,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 09:03:38,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 09:03:38,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 09:03:38,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:03:38" (1/1) ... [2022-03-20 09:03:38,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:03:38" (1/1) ... [2022-03-20 09:03:38,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:03:38" (1/1) ... [2022-03-20 09:03:38,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:03:38" (1/1) ... [2022-03-20 09:03:39,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:03:38" (1/1) ... [2022-03-20 09:03:39,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:03:38" (1/1) ... [2022-03-20 09:03:39,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:03:38" (1/1) ... [2022-03-20 09:03:39,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 09:03:39,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 09:03:39,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 09:03:39,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 09:03:39,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:03:38" (1/1) ... [2022-03-20 09:03:39,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:03:39,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:39,044 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) [2022-03-20 09:03:39,045 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 [2022-03-20 09:03:39,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 09:03:39,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 09:03:39,076 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 09:03:39,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 09:03:39,077 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-03-20 09:03:39,077 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-03-20 09:03:39,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 09:03:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 09:03:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 09:03:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 09:03:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 09:03:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 09:03:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 09:03:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-03-20 09:03:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-03-20 09:03:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 09:03:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 09:03:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 09:03:39,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 09:03:39,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 09:03:39,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 09:03:39,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 09:03:39,124 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 09:03:39,125 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 09:03:39,256 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 09:03:39,266 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 09:03:39,266 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 09:03:39,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:03:39 BoogieIcfgContainer [2022-03-20 09:03:39,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 09:03:39,268 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 09:03:39,268 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 09:03:39,280 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 09:03:39,290 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:03:39" (1/1) ... [2022-03-20 09:03:39,292 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 09:03:39,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:03:39 BasicIcfg [2022-03-20 09:03:39,303 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 09:03:39,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 09:03:39,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 09:03:39,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 09:03:39,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:03:38" (1/4) ... [2022-03-20 09:03:39,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796cd1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:03:39, skipping insertion in model container [2022-03-20 09:03:39,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:03:38" (2/4) ... [2022-03-20 09:03:39,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796cd1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:03:39, skipping insertion in model container [2022-03-20 09:03:39,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:03:39" (3/4) ... [2022-03-20 09:03:39,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796cd1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:03:39, skipping insertion in model container [2022-03-20 09:03:39,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:03:39" (4/4) ... [2022-03-20 09:03:39,308 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.cqvasr [2022-03-20 09:03:39,311 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 09:03:39,311 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 09:03:39,376 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 09:03:39,381 INFO L340 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=FINITE_AUTOMATA, 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 [2022-03-20 09:03:39,381 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 09:03:39,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 09:03:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 09:03:39,405 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:39,406 INFO L499 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] [2022-03-20 09:03:39,406 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:39,410 INFO L85 PathProgramCache]: Analyzing trace with hash -405319789, now seen corresponding path program 1 times [2022-03-20 09:03:39,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:39,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417181235] [2022-03-20 09:03:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:39,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:39,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:39,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:39,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 09:03:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:39,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:39,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417181235] [2022-03-20 09:03:39,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417181235] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:03:39,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:03:39,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 09:03:39,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899528788] [2022-03-20 09:03:39,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:03:39,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 09:03:39,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:39,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 09:03:39,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-20 09:03:39,736 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:40,139 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2022-03-20 09:03:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 09:03:40,142 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-03-20 09:03:40,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:40,148 INFO L225 Difference]: With dead ends: 91 [2022-03-20 09:03:40,148 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 09:03:40,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-20 09:03:40,155 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:40,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 89 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:03:40,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 09:03:40,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-03-20 09:03:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 09:03:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-03-20 09:03:40,186 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2022-03-20 09:03:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:40,187 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-03-20 09:03:40,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:40,188 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-03-20 09:03:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 09:03:40,190 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:40,190 INFO L499 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] [2022-03-20 09:03:40,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 09:03:40,191 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:40,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1050440486, now seen corresponding path program 1 times [2022-03-20 09:03:40,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:40,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664992405] [2022-03-20 09:03:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:40,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:40,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:40,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:40,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 09:03:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:40,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:40,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664992405] [2022-03-20 09:03:40,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664992405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:03:40,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:03:40,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 09:03:40,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749117452] [2022-03-20 09:03:40,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:03:40,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 09:03:40,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:40,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 09:03:40,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 09:03:40,286 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 09:03:40,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:40,340 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-03-20 09:03:40,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 09:03:40,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-03-20 09:03:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:40,348 INFO L225 Difference]: With dead ends: 55 [2022-03-20 09:03:40,348 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 09:03:40,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:03:40,353 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:40,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:03:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 09:03:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-20 09:03:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 09:03:40,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-03-20 09:03:40,359 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 27 [2022-03-20 09:03:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:40,359 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-03-20 09:03:40,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 09:03:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-03-20 09:03:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 09:03:40,360 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:40,360 INFO L499 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] [2022-03-20 09:03:40,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 09:03:40,360 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:40,361 INFO L85 PathProgramCache]: Analyzing trace with hash -525796213, now seen corresponding path program 1 times [2022-03-20 09:03:40,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:40,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352390649] [2022-03-20 09:03:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:40,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:40,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:40,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:40,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 09:03:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:40,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:40,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352390649] [2022-03-20 09:03:40,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352390649] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:03:40,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:03:40,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 09:03:40,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667205311] [2022-03-20 09:03:40,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:03:40,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 09:03:40,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:40,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 09:03:40,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 09:03:40,433 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:40,480 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-03-20 09:03:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 09:03:40,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-03-20 09:03:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:40,481 INFO L225 Difference]: With dead ends: 72 [2022-03-20 09:03:40,481 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 09:03:40,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:03:40,482 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:40,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:03:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 09:03:40,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-03-20 09:03:40,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 09:03:40,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-03-20 09:03:40,488 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 27 [2022-03-20 09:03:40,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:40,488 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-03-20 09:03:40,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-03-20 09:03:40,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 09:03:40,489 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:40,489 INFO L499 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] [2022-03-20 09:03:40,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 09:03:40,489 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1887910336, now seen corresponding path program 1 times [2022-03-20 09:03:40,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:40,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945444296] [2022-03-20 09:03:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:40,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:40,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:40,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:40,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 09:03:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:40,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:40,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945444296] [2022-03-20 09:03:40,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945444296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:40,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065467948] [2022-03-20 09:03:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:40,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:40,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:40,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:40,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 09:03:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:40,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 09:03:40,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 09:03:40,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:03:40,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065467948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:03:40,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:03:40,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2022-03-20 09:03:40,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748032357] [2022-03-20 09:03:40,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:03:40,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 09:03:40,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:40,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 09:03:40,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:03:40,862 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:40,917 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-03-20 09:03:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 09:03:40,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-20 09:03:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:40,919 INFO L225 Difference]: With dead ends: 56 [2022-03-20 09:03:40,919 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 09:03:40,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-20 09:03:40,920 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:40,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 129 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:03:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 09:03:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-03-20 09:03:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 09:03:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-20 09:03:40,935 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2022-03-20 09:03:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:40,938 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-20 09:03:40,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-20 09:03:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 09:03:40,940 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:40,940 INFO L499 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] [2022-03-20 09:03:40,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 09:03:41,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:41,147 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:41,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1183994556, now seen corresponding path program 1 times [2022-03-20 09:03:41,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:41,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174943725] [2022-03-20 09:03:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:41,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:41,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:41,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:41,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 09:03:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:41,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:41,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174943725] [2022-03-20 09:03:41,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174943725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:41,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392527627] [2022-03-20 09:03:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:41,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:41,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:41,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:41,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 09:03:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:41,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 09:03:41,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:41,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:41,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392527627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:41,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:41,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-03-20 09:03:41,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691506063] [2022-03-20 09:03:41,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:41,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 09:03:41,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:41,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 09:03:41,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:03:41,363 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 09:03:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:41,429 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-03-20 09:03:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 09:03:41,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-03-20 09:03:41,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:41,431 INFO L225 Difference]: With dead ends: 74 [2022-03-20 09:03:41,431 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 09:03:41,431 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 09:03:41,433 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:41,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 38 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:03:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 09:03:41,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-03-20 09:03:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 09:03:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-03-20 09:03:41,443 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 29 [2022-03-20 09:03:41,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:41,444 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-03-20 09:03:41,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 09:03:41,444 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-03-20 09:03:41,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 09:03:41,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:41,449 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:41,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 09:03:41,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:41,663 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:41,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1942557629, now seen corresponding path program 2 times [2022-03-20 09:03:41,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:41,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833141885] [2022-03-20 09:03:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:41,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:41,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:41,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 09:03:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:03:41,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:41,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833141885] [2022-03-20 09:03:41,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833141885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:03:41,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:03:41,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 09:03:41,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254177306] [2022-03-20 09:03:41,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:03:41,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 09:03:41,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:41,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 09:03:41,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:03:41,767 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:41,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:41,904 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-03-20 09:03:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 09:03:41,904 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-20 09:03:41,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:41,905 INFO L225 Difference]: With dead ends: 53 [2022-03-20 09:03:41,905 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 09:03:41,905 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-20 09:03:41,905 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:41,906 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 52 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:03:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 09:03:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-20 09:03:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 09:03:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-03-20 09:03:41,910 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 31 [2022-03-20 09:03:41,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:41,910 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-03-20 09:03:41,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-03-20 09:03:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 09:03:41,910 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:41,911 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:41,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 09:03:41,911 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:41,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:41,911 INFO L85 PathProgramCache]: Analyzing trace with hash -2136669557, now seen corresponding path program 1 times [2022-03-20 09:03:41,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:41,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573808775] [2022-03-20 09:03:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:41,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:41,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:41,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:41,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 09:03:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 09:03:41,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:41,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573808775] [2022-03-20 09:03:41,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573808775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:41,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480588580] [2022-03-20 09:03:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:41,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:41,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:41,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:41,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 09:03:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:42,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 09:03:42,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:03:42,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:03:42,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480588580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:42,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:42,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2022-03-20 09:03:42,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277949135] [2022-03-20 09:03:42,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:42,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 09:03:42,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:42,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 09:03:42,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:03:42,156 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 09:03:42,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:42,337 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-03-20 09:03:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 09:03:42,338 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-03-20 09:03:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:42,338 INFO L225 Difference]: With dead ends: 73 [2022-03-20 09:03:42,338 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 09:03:42,339 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-03-20 09:03:42,339 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:42,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:03:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 09:03:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-20 09:03:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 09:03:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-03-20 09:03:42,344 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2022-03-20 09:03:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:42,344 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-03-20 09:03:42,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 09:03:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-03-20 09:03:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 09:03:42,345 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:42,345 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:42,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 09:03:42,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:42,559 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:42,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1468224207, now seen corresponding path program 1 times [2022-03-20 09:03:42,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:42,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537369556] [2022-03-20 09:03:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:42,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:42,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:42,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:42,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 09:03:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:03:42,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:42,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537369556] [2022-03-20 09:03:42,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537369556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:42,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866298665] [2022-03-20 09:03:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:42,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:42,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:42,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:42,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 09:03:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:42,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 09:03:42,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:03:42,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:03:42,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866298665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:42,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:42,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-03-20 09:03:42,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86446306] [2022-03-20 09:03:42,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:42,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 09:03:42,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:42,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 09:03:42,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:03:42,805 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 09:03:42,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:42,927 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2022-03-20 09:03:42,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 09:03:42,927 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-03-20 09:03:42,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:42,929 INFO L225 Difference]: With dead ends: 65 [2022-03-20 09:03:42,929 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 09:03:42,930 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-03-20 09:03:42,930 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:42,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 46 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:03:42,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 09:03:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-03-20 09:03:42,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 09:03:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-03-20 09:03:42,937 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 37 [2022-03-20 09:03:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:42,938 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-03-20 09:03:42,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 09:03:42,938 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-03-20 09:03:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 09:03:42,939 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:42,939 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:42,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 09:03:43,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:43,151 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash -339230256, now seen corresponding path program 1 times [2022-03-20 09:03:43,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:43,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618193612] [2022-03-20 09:03:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:43,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:43,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:43,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:43,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 09:03:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 09:03:43,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:43,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618193612] [2022-03-20 09:03:43,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618193612] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:03:43,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:03:43,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 09:03:43,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117123809] [2022-03-20 09:03:43,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:03:43,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 09:03:43,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:43,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 09:03:43,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-20 09:03:43,251 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:43,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:43,469 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-03-20 09:03:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 09:03:43,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-03-20 09:03:43,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:43,472 INFO L225 Difference]: With dead ends: 60 [2022-03-20 09:03:43,472 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 09:03:43,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-03-20 09:03:43,474 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:43,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 69 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:03:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 09:03:43,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-03-20 09:03:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:03:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-03-20 09:03:43,483 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 37 [2022-03-20 09:03:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:43,483 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-03-20 09:03:43,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-03-20 09:03:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 09:03:43,484 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:43,484 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:43,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 09:03:43,484 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:43,484 INFO L85 PathProgramCache]: Analyzing trace with hash -26371531, now seen corresponding path program 2 times [2022-03-20 09:03:43,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:43,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230552883] [2022-03-20 09:03:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:43,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:43,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:43,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:43,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 09:03:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:43,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:43,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230552883] [2022-03-20 09:03:43,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230552883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:43,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113331111] [2022-03-20 09:03:43,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:03:43,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:43,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:43,660 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:43,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 09:03:43,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:03:43,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:03:43,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 09:03:43,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:43,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:44,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113331111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:44,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:44,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2022-03-20 09:03:44,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933858542] [2022-03-20 09:03:44,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:44,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 09:03:44,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:44,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 09:03:44,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-03-20 09:03:44,357 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:44,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:44,697 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-03-20 09:03:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 09:03:44,697 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-03-20 09:03:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:44,698 INFO L225 Difference]: With dead ends: 67 [2022-03-20 09:03:44,698 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 09:03:44,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 09:03:44,699 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:44,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 67 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:03:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 09:03:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-03-20 09:03:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:03:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-03-20 09:03:44,703 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 39 [2022-03-20 09:03:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:44,703 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-03-20 09:03:44,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-03-20 09:03:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 09:03:44,703 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:44,703 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:44,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 09:03:44,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 09:03:44,916 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:44,916 INFO L85 PathProgramCache]: Analyzing trace with hash -315628374, now seen corresponding path program 2 times [2022-03-20 09:03:44,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:44,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740933573] [2022-03-20 09:03:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:44,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:44,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:44,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:44,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 09:03:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:45,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:45,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740933573] [2022-03-20 09:03:45,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740933573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:45,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246191289] [2022-03-20 09:03:45,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:03:45,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:45,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:45,057 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:45,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 09:03:45,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:03:45,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:03:45,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 09:03:45,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:45,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:45,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246191289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:45,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:45,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2022-03-20 09:03:45,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265220695] [2022-03-20 09:03:45,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:45,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 09:03:45,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:45,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 09:03:45,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-03-20 09:03:45,655 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:45,940 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2022-03-20 09:03:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 09:03:45,940 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-03-20 09:03:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:45,941 INFO L225 Difference]: With dead ends: 61 [2022-03-20 09:03:45,941 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 09:03:45,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 09:03:45,942 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:45,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 75 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:03:45,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 09:03:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 09:03:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:03:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-03-20 09:03:45,945 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 39 [2022-03-20 09:03:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:45,945 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-03-20 09:03:45,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-03-20 09:03:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 09:03:45,946 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:45,946 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:45,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 09:03:46,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:46,156 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:46,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:46,156 INFO L85 PathProgramCache]: Analyzing trace with hash -627253872, now seen corresponding path program 3 times [2022-03-20 09:03:46,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:46,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310382411] [2022-03-20 09:03:46,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:46,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:46,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:46,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:46,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 09:03:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:46,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:46,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310382411] [2022-03-20 09:03:46,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310382411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:46,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989102298] [2022-03-20 09:03:46,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:03:46,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:46,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:46,316 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:46,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 09:03:46,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 09:03:46,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:03:46,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 09:03:46,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:46,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:47,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989102298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:47,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:47,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-03-20 09:03:47,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563147038] [2022-03-20 09:03:47,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:47,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 09:03:47,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:47,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 09:03:47,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 09:03:47,147 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:47,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:47,634 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2022-03-20 09:03:47,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 09:03:47,634 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-03-20 09:03:47,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:47,635 INFO L225 Difference]: With dead ends: 74 [2022-03-20 09:03:47,635 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 09:03:47,636 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=2501, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 09:03:47,636 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:47,636 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 87 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:03:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 09:03:47,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2022-03-20 09:03:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:03:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-03-20 09:03:47,639 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 41 [2022-03-20 09:03:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:47,639 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-03-20 09:03:47,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:47,640 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-03-20 09:03:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 09:03:47,640 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:47,640 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:47,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 09:03:47,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:47,841 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:47,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1113193838, now seen corresponding path program 3 times [2022-03-20 09:03:47,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:47,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113802376] [2022-03-20 09:03:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:47,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:47,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:47,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:47,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 09:03:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:48,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:48,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113802376] [2022-03-20 09:03:48,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113802376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:48,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661721963] [2022-03-20 09:03:48,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:03:48,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:48,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:48,014 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:48,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 09:03:48,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 09:03:48,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:03:48,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 09:03:48,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:48,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:48,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661721963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:48,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:48,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-03-20 09:03:48,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907826642] [2022-03-20 09:03:48,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:48,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 09:03:48,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 09:03:48,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 09:03:48,777 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:49,223 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-03-20 09:03:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 09:03:49,223 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-03-20 09:03:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:49,224 INFO L225 Difference]: With dead ends: 69 [2022-03-20 09:03:49,224 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 09:03:49,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=2501, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 09:03:49,225 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 112 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:49,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 80 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:03:49,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 09:03:49,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-03-20 09:03:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:03:49,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-03-20 09:03:49,228 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 41 [2022-03-20 09:03:49,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:49,229 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-03-20 09:03:49,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:49,229 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-03-20 09:03:49,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 09:03:49,229 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:49,229 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:49,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 09:03:49,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 09:03:49,446 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:49,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:49,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1908139756, now seen corresponding path program 4 times [2022-03-20 09:03:49,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:49,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487383081] [2022-03-20 09:03:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:49,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:49,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:49,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:49,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 09:03:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:49,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:49,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487383081] [2022-03-20 09:03:49,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487383081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:49,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806950706] [2022-03-20 09:03:49,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:03:49,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:49,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:49,587 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:49,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 09:03:49,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:03:49,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:03:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 09:03:49,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:49,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:50,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806950706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:50,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:50,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2022-03-20 09:03:50,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954884982] [2022-03-20 09:03:50,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:50,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 09:03:50,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:50,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 09:03:50,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 09:03:50,269 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:50,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:50,667 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2022-03-20 09:03:50,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 09:03:50,667 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-03-20 09:03:50,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:50,668 INFO L225 Difference]: With dead ends: 71 [2022-03-20 09:03:50,668 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 09:03:50,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 09:03:50,669 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:50,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 92 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:03:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 09:03:50,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-03-20 09:03:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:03:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-03-20 09:03:50,673 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 43 [2022-03-20 09:03:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:50,673 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-03-20 09:03:50,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:50,673 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-03-20 09:03:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 09:03:50,673 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:50,673 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:50,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 09:03:50,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 09:03:50,887 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:50,887 INFO L85 PathProgramCache]: Analyzing trace with hash -721594743, now seen corresponding path program 4 times [2022-03-20 09:03:50,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:50,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234090828] [2022-03-20 09:03:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:50,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:50,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:50,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:50,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 09:03:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:51,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:51,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234090828] [2022-03-20 09:03:51,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234090828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:51,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329302509] [2022-03-20 09:03:51,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:03:51,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:51,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:51,041 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:51,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 09:03:51,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:03:51,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:03:51,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 09:03:51,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:51,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:51,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329302509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:51,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:51,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2022-03-20 09:03:51,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120532675] [2022-03-20 09:03:51,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:51,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 09:03:51,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:51,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 09:03:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 09:03:51,712 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:52,078 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-03-20 09:03:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 09:03:52,079 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-03-20 09:03:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:52,079 INFO L225 Difference]: With dead ends: 65 [2022-03-20 09:03:52,079 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 09:03:52,080 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 09:03:52,080 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:52,081 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 90 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:03:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 09:03:52,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-20 09:03:52,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 44 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:03:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-03-20 09:03:52,084 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 43 [2022-03-20 09:03:52,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:52,084 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-03-20 09:03:52,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:52,084 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-03-20 09:03:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 09:03:52,084 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:52,084 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:52,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 09:03:52,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 09:03:52,301 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:52,301 INFO L85 PathProgramCache]: Analyzing trace with hash 81089455, now seen corresponding path program 5 times [2022-03-20 09:03:52,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:52,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864772248] [2022-03-20 09:03:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:52,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:52,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:52,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:52,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 09:03:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:52,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:52,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864772248] [2022-03-20 09:03:52,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864772248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:52,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314910981] [2022-03-20 09:03:52,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:03:52,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:52,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:52,465 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:52,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 09:03:52,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-20 09:03:52,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:03:52,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 09:03:52,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:52,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:53,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314910981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:53,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:53,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2022-03-20 09:03:53,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832627554] [2022-03-20 09:03:53,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:53,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 09:03:53,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:53,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 09:03:53,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 09:03:53,301 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:53,770 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2022-03-20 09:03:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 09:03:53,770 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-03-20 09:03:53,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:53,771 INFO L225 Difference]: With dead ends: 78 [2022-03-20 09:03:53,771 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 09:03:53,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=3301, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 09:03:53,772 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:53,773 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 62 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:03:53,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 09:03:53,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-03-20 09:03:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:03:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-03-20 09:03:53,777 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 45 [2022-03-20 09:03:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:53,777 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-03-20 09:03:53,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:53,778 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-03-20 09:03:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 09:03:53,778 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:53,778 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:53,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 09:03:53,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 09:03:53,987 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:53,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1919563725, now seen corresponding path program 5 times [2022-03-20 09:03:53,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:53,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399021690] [2022-03-20 09:03:53,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:53,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:54,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:54,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:54,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 09:03:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:54,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:54,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399021690] [2022-03-20 09:03:54,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399021690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:54,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611774895] [2022-03-20 09:03:54,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:03:54,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:54,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:54,188 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:54,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 09:03:54,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-20 09:03:54,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:03:54,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 09:03:54,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:54,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:54,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611774895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:54,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:54,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2022-03-20 09:03:54,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852387931] [2022-03-20 09:03:54,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:54,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 09:03:54,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:54,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 09:03:54,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 09:03:54,974 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:55,485 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-03-20 09:03:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 09:03:55,485 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-03-20 09:03:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:55,486 INFO L225 Difference]: With dead ends: 73 [2022-03-20 09:03:55,486 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 09:03:55,486 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=3301, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 09:03:55,487 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 109 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:55,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 90 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:03:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 09:03:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-03-20 09:03:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:03:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-03-20 09:03:55,495 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 45 [2022-03-20 09:03:55,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:55,495 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-03-20 09:03:55,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-03-20 09:03:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 09:03:55,495 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:55,496 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:55,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 09:03:55,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 09:03:55,711 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:55,712 INFO L85 PathProgramCache]: Analyzing trace with hash -80791629, now seen corresponding path program 6 times [2022-03-20 09:03:55,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:55,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217297267] [2022-03-20 09:03:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:55,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:55,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:55,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:55,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 09:03:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:55,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:55,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217297267] [2022-03-20 09:03:55,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217297267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:55,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134519981] [2022-03-20 09:03:55,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:03:55,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:55,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:55,876 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:55,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 09:03:55,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 09:03:55,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:03:55,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 09:03:55,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:56,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:56,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134519981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:56,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:56,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2022-03-20 09:03:56,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141841864] [2022-03-20 09:03:56,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:56,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 09:03:56,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:56,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 09:03:56,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 09:03:56,647 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:57,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:57,018 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-03-20 09:03:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 09:03:57,018 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-03-20 09:03:57,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:57,019 INFO L225 Difference]: With dead ends: 75 [2022-03-20 09:03:57,019 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 09:03:57,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 09:03:57,020 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:57,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 67 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:03:57,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 09:03:57,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-03-20 09:03:57,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:03:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-03-20 09:03:57,024 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 47 [2022-03-20 09:03:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:57,024 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-03-20 09:03:57,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-03-20 09:03:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 09:03:57,024 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:57,025 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:57,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 09:03:57,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 09:03:57,243 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:57,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2012129320, now seen corresponding path program 6 times [2022-03-20 09:03:57,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:57,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809579084] [2022-03-20 09:03:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:57,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:57,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:57,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:57,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 09:03:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:57,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:57,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809579084] [2022-03-20 09:03:57,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809579084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:57,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015253496] [2022-03-20 09:03:57,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:03:57,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:57,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:57,431 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:57,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 09:03:57,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 09:03:57,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:03:57,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 09:03:57,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:57,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:58,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015253496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:58,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:58,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2022-03-20 09:03:58,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419418658] [2022-03-20 09:03:58,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:58,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 09:03:58,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:58,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 09:03:58,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 09:03:58,172 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:03:58,609 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-03-20 09:03:58,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 09:03:58,610 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-03-20 09:03:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:03:58,610 INFO L225 Difference]: With dead ends: 69 [2022-03-20 09:03:58,610 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 09:03:58,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 09:03:58,611 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:03:58,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 100 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:03:58,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 09:03:58,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-20 09:03:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:03:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-03-20 09:03:58,615 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 47 [2022-03-20 09:03:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:03:58,615 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-03-20 09:03:58,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:03:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-03-20 09:03:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 09:03:58,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:03:58,615 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:03:58,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 09:03:58,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:58,820 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:03:58,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:03:58,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1330071154, now seen corresponding path program 7 times [2022-03-20 09:03:58,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:03:58,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970718616] [2022-03-20 09:03:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:03:58,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:03:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:58,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:03:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:58,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:03:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:58,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 09:03:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:59,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:03:59,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970718616] [2022-03-20 09:03:59,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970718616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:03:59,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465141035] [2022-03-20 09:03:59,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:03:59,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:03:59,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:03:59,017 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:03:59,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 09:03:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:03:59,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 09:03:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:03:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:59,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:03:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:03:59,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465141035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:03:59,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:03:59,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2022-03-20 09:03:59,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447950277] [2022-03-20 09:03:59,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:03:59,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 09:03:59,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:03:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 09:03:59,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 09:03:59,939 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:00,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:00,482 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-03-20 09:04:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 09:04:00,483 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-03-20 09:04:00,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:00,483 INFO L225 Difference]: With dead ends: 82 [2022-03-20 09:04:00,483 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 09:04:00,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 09:04:00,485 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:00,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 97 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:00,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 09:04:00,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-03-20 09:04:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-03-20 09:04:00,488 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 49 [2022-03-20 09:04:00,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:00,489 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-03-20 09:04:00,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-03-20 09:04:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 09:04:00,489 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:00,489 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:00,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 09:04:00,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:00,695 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:00,696 INFO L85 PathProgramCache]: Analyzing trace with hash 222646764, now seen corresponding path program 7 times [2022-03-20 09:04:00,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:00,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815589859] [2022-03-20 09:04:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:00,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:00,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:00,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:00,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 09:04:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:00,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:00,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815589859] [2022-03-20 09:04:00,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815589859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:00,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378734918] [2022-03-20 09:04:00,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:04:00,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:00,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:00,895 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:00,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 09:04:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:00,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 09:04:00,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:01,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:01,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378734918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:01,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:01,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2022-03-20 09:04:01,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197278828] [2022-03-20 09:04:01,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:01,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 09:04:01,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:01,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 09:04:01,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 09:04:01,778 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:02,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:02,291 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2022-03-20 09:04:02,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 09:04:02,292 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-03-20 09:04:02,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:02,292 INFO L225 Difference]: With dead ends: 77 [2022-03-20 09:04:02,292 INFO L226 Difference]: Without dead ends: 68 [2022-03-20 09:04:02,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 09:04:02,294 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 146 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:02,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 80 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:02,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-20 09:04:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-03-20 09:04:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-03-20 09:04:02,298 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 49 [2022-03-20 09:04:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:02,298 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-03-20 09:04:02,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-03-20 09:04:02,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 09:04:02,299 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:02,299 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:02,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 09:04:02,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:02,503 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:02,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:02,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1269581330, now seen corresponding path program 8 times [2022-03-20 09:04:02,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:02,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702101948] [2022-03-20 09:04:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:02,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:02,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:02,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:02,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 09:04:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:02,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:02,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702101948] [2022-03-20 09:04:02,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702101948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:02,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383040538] [2022-03-20 09:04:02,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:04:02,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:02,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:02,689 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:02,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 09:04:02,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:04:02,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:02,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 09:04:02,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:03,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:03,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383040538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:03,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:03,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2022-03-20 09:04:03,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36637919] [2022-03-20 09:04:03,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:03,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 09:04:03,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:03,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 09:04:03,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 09:04:03,562 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:04,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:04,009 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2022-03-20 09:04:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 09:04:04,011 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-03-20 09:04:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:04,011 INFO L225 Difference]: With dead ends: 79 [2022-03-20 09:04:04,011 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 09:04:04,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 09:04:04,013 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 92 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:04,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 87 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:04,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 09:04:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2022-03-20 09:04:04,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:04,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-03-20 09:04:04,016 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 51 [2022-03-20 09:04:04,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:04,017 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-03-20 09:04:04,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:04,017 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-03-20 09:04:04,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 09:04:04,017 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:04,017 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:04,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 09:04:04,224 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:04,224 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1783551609, now seen corresponding path program 8 times [2022-03-20 09:04:04,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:04,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300242529] [2022-03-20 09:04:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:04,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:04,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:04,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:04,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 09:04:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:04,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:04,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300242529] [2022-03-20 09:04:04,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300242529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:04,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168198893] [2022-03-20 09:04:04,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:04:04,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:04,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:04,431 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:04,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 09:04:04,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:04:04,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:04,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 09:04:04,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:04,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:05,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168198893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:05,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:05,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2022-03-20 09:04:05,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895961386] [2022-03-20 09:04:05,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:05,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 09:04:05,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:05,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 09:04:05,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 09:04:05,229 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:05,673 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2022-03-20 09:04:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 09:04:05,673 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-03-20 09:04:05,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:05,674 INFO L225 Difference]: With dead ends: 73 [2022-03-20 09:04:05,674 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 09:04:05,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 09:04:05,675 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:05,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 85 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 09:04:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-20 09:04:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:05,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-03-20 09:04:05,679 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 51 [2022-03-20 09:04:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:05,679 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-03-20 09:04:05,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-03-20 09:04:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 09:04:05,679 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:05,679 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:05,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 09:04:05,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:05,888 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:05,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1742757677, now seen corresponding path program 9 times [2022-03-20 09:04:05,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:05,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398982714] [2022-03-20 09:04:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:05,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:05,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:05,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:06,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 09:04:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:06,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:06,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398982714] [2022-03-20 09:04:06,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398982714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:06,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788393731] [2022-03-20 09:04:06,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:04:06,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:06,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:06,109 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:06,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 09:04:06,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-20 09:04:06,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 09:04:06,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:06,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:07,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788393731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:07,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:07,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2022-03-20 09:04:07,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952980601] [2022-03-20 09:04:07,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:07,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 09:04:07,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 09:04:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 09:04:07,169 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:07,751 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-03-20 09:04:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 09:04:07,752 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-03-20 09:04:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:07,752 INFO L225 Difference]: With dead ends: 86 [2022-03-20 09:04:07,752 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 09:04:07,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=937, Invalid=5225, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 09:04:07,753 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:07,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 87 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:07,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 09:04:07,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2022-03-20 09:04:07,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-03-20 09:04:07,757 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 53 [2022-03-20 09:04:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:07,758 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-03-20 09:04:07,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-03-20 09:04:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 09:04:07,758 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:07,758 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:07,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 09:04:07,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:07,975 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:07,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:07,975 INFO L85 PathProgramCache]: Analyzing trace with hash -733439029, now seen corresponding path program 9 times [2022-03-20 09:04:07,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:07,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966834420] [2022-03-20 09:04:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:07,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:07,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:07,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:08,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 09:04:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:08,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:08,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966834420] [2022-03-20 09:04:08,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966834420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:08,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777209643] [2022-03-20 09:04:08,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:04:08,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:08,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:08,202 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:08,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 09:04:08,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-20 09:04:08,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:08,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 09:04:08,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:08,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:09,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777209643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:09,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:09,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2022-03-20 09:04:09,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724309234] [2022-03-20 09:04:09,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:09,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 09:04:09,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:09,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 09:04:09,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 09:04:09,211 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:09,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:09,810 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-03-20 09:04:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 09:04:09,811 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-03-20 09:04:09,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:09,814 INFO L225 Difference]: With dead ends: 81 [2022-03-20 09:04:09,814 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 09:04:09,815 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=937, Invalid=5225, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 09:04:09,815 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 133 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:09,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 95 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:09,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 09:04:09,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-03-20 09:04:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-03-20 09:04:09,819 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 53 [2022-03-20 09:04:09,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:09,820 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-03-20 09:04:09,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:09,820 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-03-20 09:04:09,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 09:04:09,820 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:09,820 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:09,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-20 09:04:10,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 09:04:10,026 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:10,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:10,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1594135601, now seen corresponding path program 10 times [2022-03-20 09:04:10,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:10,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965671551] [2022-03-20 09:04:10,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:10,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:10,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:10,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:10,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 09:04:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:10,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:10,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965671551] [2022-03-20 09:04:10,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965671551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:10,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153285254] [2022-03-20 09:04:10,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:04:10,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:10,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:10,233 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:10,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 09:04:10,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:04:10,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:10,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 09:04:10,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:10,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:11,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153285254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:11,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:11,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2022-03-20 09:04:11,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444076370] [2022-03-20 09:04:11,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:11,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 09:04:11,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:11,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 09:04:11,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 09:04:11,151 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:11,664 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-03-20 09:04:11,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 09:04:11,665 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-20 09:04:11,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:11,665 INFO L225 Difference]: With dead ends: 83 [2022-03-20 09:04:11,666 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 09:04:11,666 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=913, Invalid=4787, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 09:04:11,667 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:11,667 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 87 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 09:04:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-03-20 09:04:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 57 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-03-20 09:04:11,671 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 55 [2022-03-20 09:04:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:11,671 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-03-20 09:04:11,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:11,671 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-03-20 09:04:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 09:04:11,671 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:11,672 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:11,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 09:04:11,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 09:04:11,883 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:11,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash 985541286, now seen corresponding path program 10 times [2022-03-20 09:04:11,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:11,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143532701] [2022-03-20 09:04:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:11,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:11,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:11,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:12,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 09:04:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:12,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:12,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143532701] [2022-03-20 09:04:12,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143532701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:12,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638378419] [2022-03-20 09:04:12,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:04:12,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:12,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:12,130 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:12,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 09:04:12,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:04:12,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:12,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 09:04:12,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:12,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:12,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638378419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:12,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:12,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2022-03-20 09:04:12,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922233782] [2022-03-20 09:04:12,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:12,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 09:04:12,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:12,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 09:04:12,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 09:04:12,993 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:13,530 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-03-20 09:04:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 09:04:13,530 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-20 09:04:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:13,531 INFO L225 Difference]: With dead ends: 77 [2022-03-20 09:04:13,531 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 09:04:13,532 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=913, Invalid=4787, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 09:04:13,532 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 107 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:13,532 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 95 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:04:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 09:04:13,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-03-20 09:04:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 56 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:13,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-03-20 09:04:13,537 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 55 [2022-03-20 09:04:13,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:13,537 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-03-20 09:04:13,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:13,537 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-03-20 09:04:13,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 09:04:13,537 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:13,537 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:13,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 09:04:13,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 09:04:13,751 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:13,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:13,752 INFO L85 PathProgramCache]: Analyzing trace with hash -38693748, now seen corresponding path program 11 times [2022-03-20 09:04:13,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:13,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033302446] [2022-03-20 09:04:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:13,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:13,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:13,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:13,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 09:04:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:13,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:13,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033302446] [2022-03-20 09:04:13,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033302446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:13,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779361201] [2022-03-20 09:04:13,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:04:13,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:13,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:13,999 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:14,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 09:04:14,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-20 09:04:14,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:14,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 09:04:14,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:14,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:15,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779361201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:15,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:15,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2022-03-20 09:04:15,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812526360] [2022-03-20 09:04:15,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:15,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 09:04:15,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:15,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 09:04:15,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 09:04:15,072 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:15,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:15,737 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-03-20 09:04:15,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 09:04:15,738 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-03-20 09:04:15,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:15,738 INFO L225 Difference]: With dead ends: 90 [2022-03-20 09:04:15,738 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 09:04:15,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3000 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1133, Invalid=6349, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 09:04:15,739 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 173 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:15,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 82 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 09:04:15,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-03-20 09:04:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-03-20 09:04:15,744 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 57 [2022-03-20 09:04:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:15,744 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-03-20 09:04:15,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-03-20 09:04:15,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 09:04:15,744 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:15,744 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:15,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 09:04:15,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:15,957 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:15,957 INFO L85 PathProgramCache]: Analyzing trace with hash -241343126, now seen corresponding path program 11 times [2022-03-20 09:04:15,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:15,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491846247] [2022-03-20 09:04:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:15,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:15,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:15,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:16,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 09:04:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:16,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:16,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491846247] [2022-03-20 09:04:16,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491846247] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:16,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558910781] [2022-03-20 09:04:16,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:04:16,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:16,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:16,245 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:16,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 09:04:16,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-20 09:04:16,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 09:04:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:16,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:17,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558910781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:17,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:17,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2022-03-20 09:04:17,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473949619] [2022-03-20 09:04:17,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:17,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 09:04:17,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:17,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 09:04:17,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 09:04:17,315 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:17,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:17,956 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2022-03-20 09:04:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 09:04:17,956 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-03-20 09:04:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:17,957 INFO L225 Difference]: With dead ends: 85 [2022-03-20 09:04:17,957 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 09:04:17,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3008 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1133, Invalid=6349, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 09:04:17,958 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:17,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 90 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:17,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 09:04:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-03-20 09:04:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.1) internal successors, (66), 62 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-03-20 09:04:17,963 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 57 [2022-03-20 09:04:17,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:17,963 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-03-20 09:04:17,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-03-20 09:04:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 09:04:17,964 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:17,964 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:17,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 09:04:18,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 09:04:18,175 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:18,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2051895824, now seen corresponding path program 12 times [2022-03-20 09:04:18,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:18,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653286358] [2022-03-20 09:04:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:18,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:18,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:18,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:18,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 09:04:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:18,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:18,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653286358] [2022-03-20 09:04:18,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653286358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:18,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736285315] [2022-03-20 09:04:18,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:04:18,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:18,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:18,405 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:18,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 09:04:18,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 09:04:18,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:18,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 09:04:18,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:18,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:19,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736285315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:19,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:19,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2022-03-20 09:04:19,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64662084] [2022-03-20 09:04:19,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:19,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 09:04:19,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:19,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 09:04:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 09:04:19,471 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:19,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:19,995 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2022-03-20 09:04:19,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 09:04:19,995 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-03-20 09:04:19,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:19,996 INFO L225 Difference]: With dead ends: 87 [2022-03-20 09:04:19,996 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 09:04:19,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2919 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1111, Invalid=5861, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 09:04:19,997 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:19,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 77 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 09:04:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-03-20 09:04:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-03-20 09:04:20,002 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 59 [2022-03-20 09:04:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:20,002 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-03-20 09:04:20,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-03-20 09:04:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 09:04:20,003 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:20,003 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:20,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 09:04:20,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:20,215 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:20,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1297808261, now seen corresponding path program 12 times [2022-03-20 09:04:20,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:20,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666180474] [2022-03-20 09:04:20,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:20,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:20,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:20,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:20,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 09:04:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:20,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:20,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666180474] [2022-03-20 09:04:20,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666180474] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:20,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110527958] [2022-03-20 09:04:20,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:04:20,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:20,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:20,472 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:20,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 09:04:20,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 09:04:20,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:20,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 09:04:20,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:20,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:21,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110527958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:21,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:21,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2022-03-20 09:04:21,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260226996] [2022-03-20 09:04:21,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:21,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 09:04:21,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 09:04:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 09:04:21,496 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:22,056 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2022-03-20 09:04:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 09:04:22,056 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-03-20 09:04:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:22,056 INFO L225 Difference]: With dead ends: 81 [2022-03-20 09:04:22,057 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 09:04:22,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2872 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1111, Invalid=5861, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 09:04:22,058 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 122 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:22,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 85 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:22,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 09:04:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-03-20 09:04:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 60 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-03-20 09:04:22,062 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 59 [2022-03-20 09:04:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:22,062 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-03-20 09:04:22,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-03-20 09:04:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 09:04:22,063 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:22,063 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:22,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-20 09:04:22,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 09:04:22,275 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:22,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:22,275 INFO L85 PathProgramCache]: Analyzing trace with hash -597841493, now seen corresponding path program 13 times [2022-03-20 09:04:22,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:22,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217870073] [2022-03-20 09:04:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:22,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:22,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:22,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:22,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 09:04:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:22,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:22,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217870073] [2022-03-20 09:04:22,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217870073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:22,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281912087] [2022-03-20 09:04:22,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:04:22,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:22,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:22,538 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:22,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 09:04:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:22,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 09:04:22,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:23,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:23,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281912087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:23,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:23,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2022-03-20 09:04:23,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251504476] [2022-03-20 09:04:23,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:23,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 09:04:23,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 09:04:23,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 09:04:23,798 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:24,559 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-03-20 09:04:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 09:04:24,559 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-03-20 09:04:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:24,560 INFO L225 Difference]: With dead ends: 94 [2022-03-20 09:04:24,560 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 09:04:24,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3671 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1349, Invalid=7581, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 09:04:24,561 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 186 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:24,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 82 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:04:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 09:04:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2022-03-20 09:04:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-03-20 09:04:24,565 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 61 [2022-03-20 09:04:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:24,566 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-03-20 09:04:24,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-03-20 09:04:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 09:04:24,566 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:24,566 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:24,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 09:04:24,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:24,782 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:24,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:24,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2059862327, now seen corresponding path program 13 times [2022-03-20 09:04:24,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:24,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889763923] [2022-03-20 09:04:24,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:24,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:24,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:24,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:24,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 09:04:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:25,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:25,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889763923] [2022-03-20 09:04:25,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889763923] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:25,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99797651] [2022-03-20 09:04:25,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:04:25,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:25,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:25,095 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:25,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 09:04:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:25,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 09:04:25,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:25,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:26,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99797651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:26,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:26,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2022-03-20 09:04:26,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192385409] [2022-03-20 09:04:26,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:26,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 09:04:26,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:26,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 09:04:26,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 09:04:26,346 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:26,971 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-03-20 09:04:26,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 09:04:26,971 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-03-20 09:04:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:26,972 INFO L225 Difference]: With dead ends: 89 [2022-03-20 09:04:26,972 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 09:04:26,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3680 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1349, Invalid=7581, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 09:04:26,980 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 140 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:26,980 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 75 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 09:04:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-03-20 09:04:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.09375) internal successors, (70), 66 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-03-20 09:04:26,985 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 61 [2022-03-20 09:04:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:26,985 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-03-20 09:04:26,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:26,985 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-03-20 09:04:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 09:04:26,986 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:26,986 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:27,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 09:04:27,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:27,199 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:27,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:27,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1788334161, now seen corresponding path program 14 times [2022-03-20 09:04:27,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:27,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033492057] [2022-03-20 09:04:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:27,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:27,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:27,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:27,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 09:04:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:27,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:27,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033492057] [2022-03-20 09:04:27,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033492057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:27,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414226398] [2022-03-20 09:04:27,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:04:27,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:27,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:27,458 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:27,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 09:04:27,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:04:27,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:27,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 09:04:27,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:27,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:28,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414226398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:28,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:28,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2022-03-20 09:04:28,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529019897] [2022-03-20 09:04:28,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:28,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 09:04:28,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:28,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 09:04:28,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 09:04:28,675 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:29,343 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2022-03-20 09:04:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 09:04:29,344 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-03-20 09:04:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:29,344 INFO L225 Difference]: With dead ends: 91 [2022-03-20 09:04:29,344 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 09:04:29,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3580 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1329, Invalid=7043, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 09:04:29,346 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:29,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 87 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:04:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 09:04:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2022-03-20 09:04:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-03-20 09:04:29,354 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 63 [2022-03-20 09:04:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:29,354 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-03-20 09:04:29,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-03-20 09:04:29,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 09:04:29,355 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:29,355 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:29,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-20 09:04:29,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:29,556 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash -627512284, now seen corresponding path program 14 times [2022-03-20 09:04:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:29,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408645928] [2022-03-20 09:04:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:29,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:29,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:29,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:29,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 09:04:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:29,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:29,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408645928] [2022-03-20 09:04:29,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408645928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:29,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912682996] [2022-03-20 09:04:29,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:04:29,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:29,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:29,840 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:29,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 09:04:29,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:04:29,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:29,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 09:04:29,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:30,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:30,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912682996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:30,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:30,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2022-03-20 09:04:30,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250467752] [2022-03-20 09:04:30,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:30,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 09:04:30,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:30,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 09:04:30,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 09:04:30,962 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:31,494 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2022-03-20 09:04:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 09:04:31,494 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-03-20 09:04:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:31,495 INFO L225 Difference]: With dead ends: 85 [2022-03-20 09:04:31,495 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 09:04:31,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3527 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1329, Invalid=7043, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 09:04:31,496 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:31,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 70 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:31,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 09:04:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-03-20 09:04:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.064516129032258) internal successors, (66), 64 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-03-20 09:04:31,502 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 63 [2022-03-20 09:04:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:31,502 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-03-20 09:04:31,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-03-20 09:04:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 09:04:31,503 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:31,503 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:31,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-20 09:04:31,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 09:04:31,711 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:31,712 INFO L85 PathProgramCache]: Analyzing trace with hash 300019338, now seen corresponding path program 15 times [2022-03-20 09:04:31,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:31,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461490899] [2022-03-20 09:04:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:31,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:31,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:31,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:31,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 09:04:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:32,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461490899] [2022-03-20 09:04:32,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461490899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28884056] [2022-03-20 09:04:32,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:04:32,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:32,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:32,017 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:32,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 09:04:32,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-20 09:04:32,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:32,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 09:04:32,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:32,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:33,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28884056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:33,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:33,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2022-03-20 09:04:33,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154605911] [2022-03-20 09:04:33,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:33,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 09:04:33,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:33,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 09:04:33,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 09:04:33,391 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:34,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:34,147 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-03-20 09:04:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 09:04:34,147 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-03-20 09:04:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:34,147 INFO L225 Difference]: With dead ends: 98 [2022-03-20 09:04:34,148 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 09:04:34,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1585, Invalid=8921, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 09:04:34,149 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 193 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:34,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 77 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:34,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 09:04:34,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2022-03-20 09:04:34,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-03-20 09:04:34,158 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 65 [2022-03-20 09:04:34,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:34,158 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-03-20 09:04:34,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:34,158 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-03-20 09:04:34,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 09:04:34,159 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:34,159 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:34,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 09:04:34,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 09:04:34,360 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:34,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:34,360 INFO L85 PathProgramCache]: Analyzing trace with hash -237193240, now seen corresponding path program 15 times [2022-03-20 09:04:34,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:34,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425822537] [2022-03-20 09:04:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:34,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:34,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:34,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:34,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 09:04:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:34,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:34,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425822537] [2022-03-20 09:04:34,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425822537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:34,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595559493] [2022-03-20 09:04:34,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:04:34,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:34,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:34,712 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:34,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 09:04:34,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-20 09:04:34,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:34,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 09:04:34,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:35,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:36,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595559493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:36,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:36,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2022-03-20 09:04:36,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775332086] [2022-03-20 09:04:36,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:36,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 09:04:36,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:36,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 09:04:36,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 09:04:36,047 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:36,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:36,745 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-03-20 09:04:36,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 09:04:36,746 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-03-20 09:04:36,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:36,746 INFO L225 Difference]: With dead ends: 93 [2022-03-20 09:04:36,746 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 09:04:36,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4419 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1585, Invalid=8921, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 09:04:36,748 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 149 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:36,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 75 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:36,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 09:04:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-03-20 09:04:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.088235294117647) internal successors, (74), 70 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-03-20 09:04:36,753 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 65 [2022-03-20 09:04:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:36,754 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-03-20 09:04:36,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:36,754 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-03-20 09:04:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 09:04:36,754 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:36,754 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:36,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-20 09:04:36,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:36,962 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:36,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1744968974, now seen corresponding path program 16 times [2022-03-20 09:04:36,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:36,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886531076] [2022-03-20 09:04:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:36,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:36,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:36,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:37,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 09:04:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:37,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:37,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886531076] [2022-03-20 09:04:37,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886531076] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:37,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318697306] [2022-03-20 09:04:37,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:04:37,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:37,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:37,235 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:37,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 09:04:37,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:04:37,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:37,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 09:04:37,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:37,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:38,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318697306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:38,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:38,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2022-03-20 09:04:38,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466469061] [2022-03-20 09:04:38,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:38,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 09:04:38,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:38,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 09:04:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 09:04:38,567 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:39,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:39,353 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2022-03-20 09:04:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 09:04:39,353 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-03-20 09:04:39,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:39,354 INFO L225 Difference]: With dead ends: 95 [2022-03-20 09:04:39,354 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 09:04:39,355 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4308 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1567, Invalid=8333, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 09:04:39,355 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 111 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:39,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 117 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:04:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 09:04:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2022-03-20 09:04:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 69 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-03-20 09:04:39,363 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 67 [2022-03-20 09:04:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:39,363 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-03-20 09:04:39,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-03-20 09:04:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 09:04:39,364 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:39,364 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:39,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 09:04:39,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 09:04:39,580 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:39,580 INFO L85 PathProgramCache]: Analyzing trace with hash 592792707, now seen corresponding path program 16 times [2022-03-20 09:04:39,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:39,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454382044] [2022-03-20 09:04:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:39,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:39,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:39,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:39,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 09:04:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:39,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:39,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454382044] [2022-03-20 09:04:39,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454382044] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:39,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059554916] [2022-03-20 09:04:39,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:04:39,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:39,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:39,909 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:39,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 09:04:39,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:04:39,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:39,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 09:04:39,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:40,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:41,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059554916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:41,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:41,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2022-03-20 09:04:41,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288998981] [2022-03-20 09:04:41,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:41,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 09:04:41,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:41,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 09:04:41,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 09:04:41,117 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:41,753 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-03-20 09:04:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 09:04:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-03-20 09:04:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:41,754 INFO L225 Difference]: With dead ends: 89 [2022-03-20 09:04:41,754 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 09:04:41,755 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4249 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1567, Invalid=8333, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 09:04:41,755 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:41,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 95 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 09:04:41,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-20 09:04:41,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 68 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-03-20 09:04:41,761 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 67 [2022-03-20 09:04:41,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:41,761 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-03-20 09:04:41,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-03-20 09:04:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 09:04:41,761 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:41,761 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:41,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 09:04:41,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 09:04:41,978 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash 487043881, now seen corresponding path program 17 times [2022-03-20 09:04:41,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:41,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197971273] [2022-03-20 09:04:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:41,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:42,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:42,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:42,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 09:04:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:42,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:42,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197971273] [2022-03-20 09:04:42,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197971273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:42,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408224234] [2022-03-20 09:04:42,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:04:42,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:42,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:42,304 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:42,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 09:04:42,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-20 09:04:42,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:42,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 09:04:42,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:42,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:43,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408224234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:43,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:43,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2022-03-20 09:04:43,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644200008] [2022-03-20 09:04:43,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:43,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 09:04:43,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:43,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 09:04:43,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 09:04:43,855 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:44,645 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-03-20 09:04:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 09:04:44,645 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-03-20 09:04:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:44,646 INFO L225 Difference]: With dead ends: 102 [2022-03-20 09:04:44,646 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 09:04:44,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5214 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1841, Invalid=10369, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 09:04:44,647 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:44,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 77 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:44,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 09:04:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2022-03-20 09:04:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 71 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-03-20 09:04:44,653 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 69 [2022-03-20 09:04:44,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:44,653 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-03-20 09:04:44,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-03-20 09:04:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 09:04:44,653 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:44,654 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:44,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 09:04:44,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 09:04:44,870 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:44,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:44,870 INFO L85 PathProgramCache]: Analyzing trace with hash -367664953, now seen corresponding path program 17 times [2022-03-20 09:04:44,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:44,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927141421] [2022-03-20 09:04:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:44,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:44,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:44,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:45,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 09:04:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:45,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:45,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927141421] [2022-03-20 09:04:45,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927141421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:45,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999684220] [2022-03-20 09:04:45,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:04:45,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:45,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:45,261 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:45,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 09:04:45,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-20 09:04:45,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:45,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 09:04:45,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:45,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:46,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999684220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:46,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:46,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2022-03-20 09:04:46,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110235308] [2022-03-20 09:04:46,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:46,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 09:04:46,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:46,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 09:04:46,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 09:04:46,752 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:47,540 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2022-03-20 09:04:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 09:04:47,541 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-03-20 09:04:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:47,541 INFO L225 Difference]: With dead ends: 97 [2022-03-20 09:04:47,541 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 09:04:47,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5225 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1841, Invalid=10369, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 09:04:47,543 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:47,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 85 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 09:04:47,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-03-20 09:04:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 74 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2022-03-20 09:04:47,549 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 69 [2022-03-20 09:04:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:47,549 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2022-03-20 09:04:47,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2022-03-20 09:04:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 09:04:47,550 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:47,550 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:47,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 09:04:47,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:47,755 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:47,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:47,756 INFO L85 PathProgramCache]: Analyzing trace with hash 915704365, now seen corresponding path program 18 times [2022-03-20 09:04:47,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:47,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52421544] [2022-03-20 09:04:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:47,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:47,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:47,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:47,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 09:04:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:48,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:48,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52421544] [2022-03-20 09:04:48,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52421544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:48,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166575119] [2022-03-20 09:04:48,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:04:48,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:48,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:48,098 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:48,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 09:04:48,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 09:04:48,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:48,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 09:04:48,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:48,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:49,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166575119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:49,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:49,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2022-03-20 09:04:49,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912211085] [2022-03-20 09:04:49,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:49,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 09:04:49,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:49,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 09:04:49,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 09:04:49,519 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:50,243 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-03-20 09:04:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 09:04:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-03-20 09:04:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:50,245 INFO L225 Difference]: With dead ends: 99 [2022-03-20 09:04:50,245 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 09:04:50,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5103 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1825, Invalid=9731, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 09:04:50,246 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 147 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:50,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 82 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:04:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 09:04:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2022-03-20 09:04:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 73 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-03-20 09:04:50,256 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 71 [2022-03-20 09:04:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:50,256 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-03-20 09:04:50,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-03-20 09:04:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 09:04:50,257 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:50,257 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:50,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-20 09:04:50,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:50,460 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:50,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:50,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1765371042, now seen corresponding path program 18 times [2022-03-20 09:04:50,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:50,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966141770] [2022-03-20 09:04:50,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:50,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:50,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:50,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:50,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 09:04:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:50,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:50,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966141770] [2022-03-20 09:04:50,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966141770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:50,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288718819] [2022-03-20 09:04:50,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:04:50,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:50,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:50,807 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:50,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 09:04:50,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 09:04:50,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:50,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 09:04:50,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:51,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:52,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288718819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:52,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:52,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2022-03-20 09:04:52,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491022966] [2022-03-20 09:04:52,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:52,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 09:04:52,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:52,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 09:04:52,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 09:04:52,176 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:52,843 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2022-03-20 09:04:52,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 09:04:52,844 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-03-20 09:04:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:52,844 INFO L225 Difference]: With dead ends: 93 [2022-03-20 09:04:52,844 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 09:04:52,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5038 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1825, Invalid=9731, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 09:04:52,846 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 120 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:52,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 90 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:04:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 09:04:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-03-20 09:04:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 72 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-03-20 09:04:52,852 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 71 [2022-03-20 09:04:52,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:52,852 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-03-20 09:04:52,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:52,852 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-03-20 09:04:52,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 09:04:52,852 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:52,852 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:52,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-20 09:04:53,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-20 09:04:53,059 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:53,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:53,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2053392264, now seen corresponding path program 19 times [2022-03-20 09:04:53,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:53,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353696958] [2022-03-20 09:04:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:53,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:53,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:53,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:53,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 09:04:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:53,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:53,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353696958] [2022-03-20 09:04:53,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353696958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:53,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855688276] [2022-03-20 09:04:53,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:04:53,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:53,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:53,402 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:53,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 09:04:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:53,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 09:04:53,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:54,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:55,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855688276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:55,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:55,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2022-03-20 09:04:55,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455047027] [2022-03-20 09:04:55,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:55,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 09:04:55,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:55,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 09:04:55,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 09:04:55,091 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:56,078 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-03-20 09:04:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 09:04:56,079 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-03-20 09:04:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:56,079 INFO L225 Difference]: With dead ends: 106 [2022-03-20 09:04:56,079 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 09:04:56,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6086 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2117, Invalid=11925, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 09:04:56,081 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:56,081 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 132 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:04:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 09:04:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-03-20 09:04:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 75 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:56,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-03-20 09:04:56,087 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 73 [2022-03-20 09:04:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:56,087 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-03-20 09:04:56,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:56,088 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-03-20 09:04:56,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 09:04:56,088 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:56,088 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:56,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 09:04:56,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-20 09:04:56,299 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:56,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:56,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1027459430, now seen corresponding path program 19 times [2022-03-20 09:04:56,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:56,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793994864] [2022-03-20 09:04:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:56,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:56,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:56,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:56,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 09:04:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:56,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:56,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793994864] [2022-03-20 09:04:56,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793994864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:56,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280256092] [2022-03-20 09:04:56,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:04:56,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:56,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:56,695 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:56,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 09:04:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:56,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 09:04:56,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:04:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:57,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:04:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:58,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280256092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:04:58,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:04:58,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2022-03-20 09:04:58,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581992352] [2022-03-20 09:04:58,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:04:58,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 09:04:58,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:04:58,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 09:04:58,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 09:04:58,237 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:04:59,118 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2022-03-20 09:04:59,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 09:04:59,119 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-03-20 09:04:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:04:59,120 INFO L225 Difference]: With dead ends: 101 [2022-03-20 09:04:59,120 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 09:04:59,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6098 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2117, Invalid=11925, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 09:04:59,121 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:04:59,123 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 95 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:04:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 09:04:59,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-03-20 09:04:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 78 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:04:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-03-20 09:04:59,131 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 73 [2022-03-20 09:04:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:04:59,131 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-03-20 09:04:59,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:04:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-03-20 09:04:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 09:04:59,132 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:04:59,132 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:04:59,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-20 09:04:59,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 09:04:59,343 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:04:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:04:59,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1600440076, now seen corresponding path program 20 times [2022-03-20 09:04:59,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:04:59,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316794005] [2022-03-20 09:04:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:04:59,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:04:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:59,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:04:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:59,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:04:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:59,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 09:04:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:04:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:04:59,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:04:59,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316794005] [2022-03-20 09:04:59,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316794005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:04:59,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585560496] [2022-03-20 09:04:59,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:04:59,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:04:59,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:04:59,677 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:04:59,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 09:04:59,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:04:59,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:04:59,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 09:04:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:00,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:01,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585560496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:01,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:01,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2022-03-20 09:05:01,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573471040] [2022-03-20 09:05:01,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:01,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 09:05:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:01,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 09:05:01,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 09:05:01,192 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:02,033 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2022-03-20 09:05:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 09:05:02,034 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 75 [2022-03-20 09:05:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:02,034 INFO L225 Difference]: With dead ends: 103 [2022-03-20 09:05:02,034 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 09:05:02,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5965 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2103, Invalid=11237, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 09:05:02,035 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:02,036 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 117 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:05:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 09:05:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2022-03-20 09:05:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 77 states have internal predecessors, (80), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-03-20 09:05:02,044 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 75 [2022-03-20 09:05:02,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:02,045 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-03-20 09:05:02,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:02,045 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-03-20 09:05:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 09:05:02,047 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:02,047 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:02,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 09:05:02,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 09:05:02,264 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2075827329, now seen corresponding path program 20 times [2022-03-20 09:05:02,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:02,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682290051] [2022-03-20 09:05:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:02,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:02,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:02,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:02,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 09:05:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:02,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:02,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682290051] [2022-03-20 09:05:02,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682290051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:02,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891338232] [2022-03-20 09:05:02,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:05:02,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:02,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:02,642 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:02,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 09:05:02,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:05:02,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:02,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 09:05:02,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:03,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:04,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891338232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:04,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:04,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2022-03-20 09:05:04,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931035028] [2022-03-20 09:05:04,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:04,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 09:05:04,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 09:05:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 09:05:04,158 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:04,937 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2022-03-20 09:05:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 09:05:04,937 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 75 [2022-03-20 09:05:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:04,937 INFO L225 Difference]: With dead ends: 97 [2022-03-20 09:05:04,937 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 09:05:04,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5894 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2103, Invalid=11237, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 09:05:04,939 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 141 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:04,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 95 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:05:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 09:05:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-03-20 09:05:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.054054054054054) internal successors, (78), 76 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-03-20 09:05:04,946 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 75 [2022-03-20 09:05:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:04,946 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-03-20 09:05:04,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-03-20 09:05:04,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 09:05:04,946 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:04,946 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:04,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 09:05:05,157 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:05,157 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:05,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:05,157 INFO L85 PathProgramCache]: Analyzing trace with hash -245826649, now seen corresponding path program 21 times [2022-03-20 09:05:05,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:05,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425332765] [2022-03-20 09:05:05,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:05,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:05,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:05,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:05,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 09:05:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:05,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:05,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425332765] [2022-03-20 09:05:05,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425332765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:05,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547709213] [2022-03-20 09:05:05,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:05:05,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:05,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:05,640 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:05,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 09:05:05,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-20 09:05:05,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:05,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 09:05:05,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:06,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:07,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547709213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:07,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:07,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2022-03-20 09:05:07,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094397713] [2022-03-20 09:05:07,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:07,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 09:05:07,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:07,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 09:05:07,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 09:05:07,573 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:08,664 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2022-03-20 09:05:08,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 09:05:08,665 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-03-20 09:05:08,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:08,666 INFO L225 Difference]: With dead ends: 110 [2022-03-20 09:05:08,666 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 09:05:08,667 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7025 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2413, Invalid=13589, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 09:05:08,668 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 211 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:08,668 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 87 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:05:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 09:05:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2022-03-20 09:05:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-03-20 09:05:08,675 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 77 [2022-03-20 09:05:08,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:08,675 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-03-20 09:05:08,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:08,675 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-03-20 09:05:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 09:05:08,675 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:08,676 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:08,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-20 09:05:08,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-20 09:05:08,892 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:08,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:08,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1685701061, now seen corresponding path program 21 times [2022-03-20 09:05:08,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:08,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194586966] [2022-03-20 09:05:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:08,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:08,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:08,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:09,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 09:05:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:09,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:09,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194586966] [2022-03-20 09:05:09,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194586966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:09,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165874716] [2022-03-20 09:05:09,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:05:09,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:09,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:09,341 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:09,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 09:05:09,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-20 09:05:09,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:09,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 09:05:09,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:10,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:11,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165874716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:11,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:11,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2022-03-20 09:05:11,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286365649] [2022-03-20 09:05:11,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:11,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 09:05:11,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:11,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 09:05:11,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 09:05:11,049 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:11,962 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2022-03-20 09:05:11,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 09:05:11,963 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-03-20 09:05:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:11,963 INFO L225 Difference]: With dead ends: 105 [2022-03-20 09:05:11,964 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 09:05:11,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7038 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2413, Invalid=13589, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 09:05:11,965 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:11,965 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 95 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:05:11,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 09:05:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-03-20 09:05:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.075) internal successors, (86), 82 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2022-03-20 09:05:11,972 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 77 [2022-03-20 09:05:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:11,973 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2022-03-20 09:05:11,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2022-03-20 09:05:11,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 09:05:11,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:11,973 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:11,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-20 09:05:12,189 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 09:05:12,190 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:12,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:12,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1484512341, now seen corresponding path program 22 times [2022-03-20 09:05:12,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:12,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670213964] [2022-03-20 09:05:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:12,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:12,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:12,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:12,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 09:05:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:12,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:12,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670213964] [2022-03-20 09:05:12,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670213964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:12,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795141294] [2022-03-20 09:05:12,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:05:12,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:12,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:12,544 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:12,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 09:05:12,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:05:12,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:12,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 09:05:12,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:13,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:14,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795141294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:14,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:14,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2022-03-20 09:05:14,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723603178] [2022-03-20 09:05:14,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:14,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 09:05:14,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:14,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 09:05:14,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 09:05:14,276 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:15,090 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2022-03-20 09:05:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 09:05:15,090 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 79 [2022-03-20 09:05:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:15,091 INFO L225 Difference]: With dead ends: 107 [2022-03-20 09:05:15,091 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 09:05:15,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6894 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2401, Invalid=12851, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 09:05:15,092 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 164 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:15,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 92 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:05:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 09:05:15,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-03-20 09:05:15,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 81 states have internal predecessors, (84), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-03-20 09:05:15,099 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 79 [2022-03-20 09:05:15,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:15,100 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-03-20 09:05:15,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:15,100 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-03-20 09:05:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 09:05:15,100 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:15,100 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:15,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 09:05:15,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 09:05:15,307 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:15,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:15,308 INFO L85 PathProgramCache]: Analyzing trace with hash 85601312, now seen corresponding path program 22 times [2022-03-20 09:05:15,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:15,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398935811] [2022-03-20 09:05:15,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:15,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:15,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:15,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:15,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 09:05:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:15,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398935811] [2022-03-20 09:05:15,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398935811] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:15,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210240225] [2022-03-20 09:05:15,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:05:15,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:15,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:15,766 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:15,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 09:05:15,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:05:15,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:15,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 09:05:15,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:16,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:17,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210240225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:17,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:17,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2022-03-20 09:05:17,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263667126] [2022-03-20 09:05:17,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:17,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 09:05:17,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:17,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 09:05:17,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 09:05:17,428 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:18,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:18,249 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-03-20 09:05:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 09:05:18,249 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 79 [2022-03-20 09:05:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:18,249 INFO L225 Difference]: With dead ends: 101 [2022-03-20 09:05:18,249 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 09:05:18,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6817 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2401, Invalid=12851, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 09:05:18,251 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 193 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:18,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 95 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:05:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 09:05:18,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-03-20 09:05:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 80 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-03-20 09:05:18,257 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 79 [2022-03-20 09:05:18,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:18,258 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-03-20 09:05:18,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-03-20 09:05:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 09:05:18,258 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:18,258 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:18,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 09:05:18,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:18,464 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1592582266, now seen corresponding path program 23 times [2022-03-20 09:05:18,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:18,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240799382] [2022-03-20 09:05:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:18,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:18,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:18,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:18,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 09:05:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:18,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:18,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240799382] [2022-03-20 09:05:18,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240799382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:18,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21511687] [2022-03-20 09:05:18,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:05:18,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:18,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:18,878 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:18,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 09:05:18,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-03-20 09:05:18,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:18,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 09:05:18,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:19,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:20,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21511687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:20,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:20,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2022-03-20 09:05:20,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477583793] [2022-03-20 09:05:20,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:20,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-20 09:05:20,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:20,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-20 09:05:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 09:05:20,805 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:21,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:21,822 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2022-03-20 09:05:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 09:05:21,823 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 81 [2022-03-20 09:05:21,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:21,824 INFO L225 Difference]: With dead ends: 114 [2022-03-20 09:05:21,824 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 09:05:21,825 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8031 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2729, Invalid=15361, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 09:05:21,825 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 168 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:21,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 102 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:05:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 09:05:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2022-03-20 09:05:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-03-20 09:05:21,834 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 81 [2022-03-20 09:05:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:21,834 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-03-20 09:05:21,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:21,835 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-03-20 09:05:21,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 09:05:21,835 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:21,835 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:21,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-20 09:05:22,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:22,050 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:22,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:22,050 INFO L85 PathProgramCache]: Analyzing trace with hash -809821724, now seen corresponding path program 23 times [2022-03-20 09:05:22,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:22,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612025222] [2022-03-20 09:05:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:22,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:22,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:22,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:22,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 09:05:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:22,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:22,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612025222] [2022-03-20 09:05:22,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612025222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:22,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76306968] [2022-03-20 09:05:22,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:05:22,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:22,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:22,518 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:22,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 09:05:22,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-03-20 09:05:22,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:22,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 09:05:22,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:23,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:24,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76306968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:24,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:24,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2022-03-20 09:05:24,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627219760] [2022-03-20 09:05:24,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:24,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-20 09:05:24,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:24,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-20 09:05:24,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 09:05:24,448 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:25,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:25,431 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2022-03-20 09:05:25,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 09:05:25,432 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 81 [2022-03-20 09:05:25,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:25,432 INFO L225 Difference]: With dead ends: 109 [2022-03-20 09:05:25,432 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 09:05:25,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8045 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2729, Invalid=15361, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 09:05:25,434 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 223 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:25,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 65 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:05:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 09:05:25,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-03-20 09:05:25,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 86 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2022-03-20 09:05:25,442 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 81 [2022-03-20 09:05:25,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:25,442 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2022-03-20 09:05:25,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:25,442 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2022-03-20 09:05:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 09:05:25,442 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:25,442 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:25,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-20 09:05:25,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:25,643 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1204809738, now seen corresponding path program 24 times [2022-03-20 09:05:25,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:25,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185811052] [2022-03-20 09:05:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:25,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:25,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:25,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:25,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 09:05:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:26,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:26,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185811052] [2022-03-20 09:05:26,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185811052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:26,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261574371] [2022-03-20 09:05:26,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:05:26,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:26,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:26,046 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:26,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 09:05:26,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-03-20 09:05:26,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:26,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 09:05:26,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:26,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:27,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261574371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:27,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:27,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2022-03-20 09:05:27,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476053378] [2022-03-20 09:05:27,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:27,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 09:05:27,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:27,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 09:05:27,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 09:05:27,907 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:28,823 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2022-03-20 09:05:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 09:05:28,824 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 83 [2022-03-20 09:05:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:28,824 INFO L225 Difference]: With dead ends: 111 [2022-03-20 09:05:28,824 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 09:05:28,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7890 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2719, Invalid=14573, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 09:05:28,826 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 160 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:28,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 72 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:05:28,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 09:05:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-03-20 09:05:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 85 states have internal predecessors, (88), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2022-03-20 09:05:28,833 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 83 [2022-03-20 09:05:28,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:28,833 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2022-03-20 09:05:28,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2022-03-20 09:05:28,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 09:05:28,834 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:28,834 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:28,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 09:05:29,034 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-20 09:05:29,035 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:29,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1754961025, now seen corresponding path program 24 times [2022-03-20 09:05:29,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:29,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168466885] [2022-03-20 09:05:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:29,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:29,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:29,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:29,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 09:05:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:29,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:29,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168466885] [2022-03-20 09:05:29,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168466885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:29,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692849281] [2022-03-20 09:05:29,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:05:29,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:29,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:29,508 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:29,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 09:05:29,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-03-20 09:05:29,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:29,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 09:05:29,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:30,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:31,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692849281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:31,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:31,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2022-03-20 09:05:31,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206197136] [2022-03-20 09:05:31,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:31,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 09:05:31,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 09:05:31,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 09:05:31,276 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:32,191 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2022-03-20 09:05:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 09:05:32,192 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 83 [2022-03-20 09:05:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:32,192 INFO L225 Difference]: With dead ends: 105 [2022-03-20 09:05:32,192 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 09:05:32,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7807 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2719, Invalid=14573, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 09:05:32,194 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:32,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 100 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:05:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 09:05:32,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-03-20 09:05:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.048780487804878) internal successors, (86), 84 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-03-20 09:05:32,203 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 83 [2022-03-20 09:05:32,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:32,203 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-03-20 09:05:32,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-03-20 09:05:32,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 09:05:32,204 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:32,204 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:32,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-20 09:05:32,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-20 09:05:32,421 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash -846462171, now seen corresponding path program 25 times [2022-03-20 09:05:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:32,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189381671] [2022-03-20 09:05:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:32,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:32,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:32,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:32,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 09:05:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:32,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:32,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189381671] [2022-03-20 09:05:32,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189381671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:32,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056571483] [2022-03-20 09:05:32,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:05:32,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:32,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:32,846 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:32,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 09:05:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:32,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 09:05:32,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:33,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:34,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056571483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:34,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:34,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2022-03-20 09:05:34,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606499105] [2022-03-20 09:05:34,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:34,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-20 09:05:34,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:34,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-20 09:05:34,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 09:05:34,871 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:36,016 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2022-03-20 09:05:36,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 09:05:36,019 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2022-03-20 09:05:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:36,020 INFO L225 Difference]: With dead ends: 118 [2022-03-20 09:05:36,020 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 09:05:36,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9104 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3065, Invalid=17241, Unknown=0, NotChecked=0, Total=20306 [2022-03-20 09:05:36,022 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 195 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:36,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 92 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:05:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 09:05:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2022-03-20 09:05:36,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 87 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:36,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-03-20 09:05:36,031 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 85 [2022-03-20 09:05:36,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:36,031 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-03-20 09:05:36,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-03-20 09:05:36,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 09:05:36,032 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:36,032 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:36,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 09:05:36,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-20 09:05:36,232 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:36,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:36,233 INFO L85 PathProgramCache]: Analyzing trace with hash -222355005, now seen corresponding path program 25 times [2022-03-20 09:05:36,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:36,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069821793] [2022-03-20 09:05:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:36,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:36,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:36,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:36,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 09:05:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:36,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:36,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069821793] [2022-03-20 09:05:36,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069821793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:36,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418256325] [2022-03-20 09:05:36,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:05:36,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:36,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:36,729 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:36,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 09:05:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:36,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 09:05:36,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:37,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:38,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418256325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:38,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:38,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2022-03-20 09:05:38,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870484603] [2022-03-20 09:05:38,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:38,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-20 09:05:38,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-20 09:05:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 09:05:38,749 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:39,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:39,830 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2022-03-20 09:05:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 09:05:39,831 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2022-03-20 09:05:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:39,831 INFO L225 Difference]: With dead ends: 113 [2022-03-20 09:05:39,831 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 09:05:39,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9119 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3065, Invalid=17241, Unknown=0, NotChecked=0, Total=20306 [2022-03-20 09:05:39,833 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 191 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:39,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 85 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:05:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 09:05:39,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-03-20 09:05:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 90 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2022-03-20 09:05:39,842 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 85 [2022-03-20 09:05:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:39,842 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2022-03-20 09:05:39,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2022-03-20 09:05:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 09:05:39,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:39,843 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:39,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 09:05:40,058 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-20 09:05:40,059 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1175356375, now seen corresponding path program 26 times [2022-03-20 09:05:40,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:40,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108828854] [2022-03-20 09:05:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:40,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:40,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:40,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:40,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 09:05:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:40,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:40,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108828854] [2022-03-20 09:05:40,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108828854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:40,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743387285] [2022-03-20 09:05:40,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:05:40,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:40,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:40,505 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:40,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 09:05:40,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:05:40,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:40,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 09:05:40,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:41,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:42,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743387285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:42,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:42,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2022-03-20 09:05:42,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244642881] [2022-03-20 09:05:42,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:42,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-20 09:05:42,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:42,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-20 09:05:42,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 09:05:42,608 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:43,626 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2022-03-20 09:05:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 09:05:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 87 [2022-03-20 09:05:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:43,628 INFO L225 Difference]: With dead ends: 115 [2022-03-20 09:05:43,628 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 09:05:43,630 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8953 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3057, Invalid=16403, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 09:05:43,630 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 146 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:43,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 102 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:05:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 09:05:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2022-03-20 09:05:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 89 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2022-03-20 09:05:43,639 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 87 [2022-03-20 09:05:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:43,639 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2022-03-20 09:05:43,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2022-03-20 09:05:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 09:05:43,640 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:43,640 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:43,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-20 09:05:43,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-20 09:05:43,840 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:43,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2037754526, now seen corresponding path program 26 times [2022-03-20 09:05:43,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:43,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122439689] [2022-03-20 09:05:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:43,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:43,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:43,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:44,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 09:05:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:44,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:44,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122439689] [2022-03-20 09:05:44,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122439689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:44,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490570114] [2022-03-20 09:05:44,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:05:44,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:44,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:44,325 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:44,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 09:05:44,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:05:44,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:44,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 09:05:44,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:45,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:46,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490570114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:46,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:46,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2022-03-20 09:05:46,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390376323] [2022-03-20 09:05:46,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:46,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-20 09:05:46,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:46,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-20 09:05:46,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 09:05:46,221 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:47,259 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2022-03-20 09:05:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 09:05:47,259 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 87 [2022-03-20 09:05:47,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:47,260 INFO L225 Difference]: With dead ends: 109 [2022-03-20 09:05:47,260 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 09:05:47,262 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8864 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3057, Invalid=16403, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 09:05:47,262 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 142 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:47,262 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 130 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:05:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 09:05:47,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-03-20 09:05:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 88 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:47,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-03-20 09:05:47,270 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 87 [2022-03-20 09:05:47,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:47,271 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-03-20 09:05:47,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:47,271 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-03-20 09:05:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 09:05:47,272 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:47,272 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:47,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-20 09:05:47,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-20 09:05:47,480 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1820915332, now seen corresponding path program 27 times [2022-03-20 09:05:47,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:47,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65505963] [2022-03-20 09:05:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:47,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:47,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:47,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:47,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 09:05:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:47,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:47,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65505963] [2022-03-20 09:05:47,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65505963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:47,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456143139] [2022-03-20 09:05:47,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:05:47,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:47,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:47,941 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:47,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 09:05:48,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-20 09:05:48,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:48,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 09:05:48,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:48,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:50,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456143139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:50,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:50,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2022-03-20 09:05:50,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906511572] [2022-03-20 09:05:50,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:50,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-20 09:05:50,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:50,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-20 09:05:50,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 09:05:50,181 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:51,434 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-03-20 09:05:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 09:05:51,434 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 89 [2022-03-20 09:05:51,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:51,435 INFO L225 Difference]: With dead ends: 122 [2022-03-20 09:05:51,435 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 09:05:51,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10244 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3421, Invalid=19229, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 09:05:51,437 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 182 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:51,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 122 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:05:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 09:05:51,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2022-03-20 09:05:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 91 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:51,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-03-20 09:05:51,446 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 89 [2022-03-20 09:05:51,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:51,446 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-03-20 09:05:51,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:51,447 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-03-20 09:05:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 09:05:51,447 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:51,447 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:51,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-20 09:05:51,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:51,648 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:51,648 INFO L85 PathProgramCache]: Analyzing trace with hash 302983522, now seen corresponding path program 27 times [2022-03-20 09:05:51,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:51,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681958912] [2022-03-20 09:05:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:51,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:51,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:51,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:51,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 09:05:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:52,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:52,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681958912] [2022-03-20 09:05:52,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681958912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:52,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452384994] [2022-03-20 09:05:52,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:05:52,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:52,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:52,189 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:52,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 09:05:52,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-20 09:05:52,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:52,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 09:05:52,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:53,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:54,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452384994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:54,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:54,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2022-03-20 09:05:54,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110213722] [2022-03-20 09:05:54,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:54,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-20 09:05:54,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:54,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-20 09:05:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 09:05:54,354 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:55,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:55,541 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-03-20 09:05:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 09:05:55,541 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 89 [2022-03-20 09:05:55,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:55,542 INFO L225 Difference]: With dead ends: 117 [2022-03-20 09:05:55,542 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 09:05:55,544 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10260 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3421, Invalid=19229, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 09:05:55,544 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 215 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:55,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 90 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:05:55,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 09:05:55,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2022-03-20 09:05:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.065217391304348) internal successors, (98), 94 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2022-03-20 09:05:55,553 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 89 [2022-03-20 09:05:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:55,553 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2022-03-20 09:05:55,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2022-03-20 09:05:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 09:05:55,554 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:55,554 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:55,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-20 09:05:55,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:55,772 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:55,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:55,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1163794440, now seen corresponding path program 28 times [2022-03-20 09:05:55,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:55,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280109963] [2022-03-20 09:05:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:55,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:55,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:55,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:55,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 09:05:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:56,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:56,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280109963] [2022-03-20 09:05:56,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280109963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:56,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457517487] [2022-03-20 09:05:56,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:05:56,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:56,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:56,207 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:56,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 09:05:56,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:05:56,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 09:05:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:57,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:58,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457517487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:58,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:58,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2022-03-20 09:05:58,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225943077] [2022-03-20 09:05:58,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:58,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-20 09:05:58,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-20 09:05:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 09:05:58,382 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:59,377 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2022-03-20 09:05:59,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 09:05:59,378 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 91 [2022-03-20 09:05:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:59,378 INFO L225 Difference]: With dead ends: 119 [2022-03-20 09:05:59,378 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 09:05:59,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10083 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3415, Invalid=18341, Unknown=0, NotChecked=0, Total=21756 [2022-03-20 09:05:59,381 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 172 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:59,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 77 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:05:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 09:05:59,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-03-20 09:05:59,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.054945054945055) internal successors, (96), 93 states have internal predecessors, (96), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:05:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-03-20 09:05:59,390 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 91 [2022-03-20 09:05:59,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:59,390 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-03-20 09:05:59,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:05:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-03-20 09:05:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 09:05:59,391 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:59,391 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:59,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-20 09:05:59,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:59,592 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash 871381373, now seen corresponding path program 28 times [2022-03-20 09:05:59,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:59,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085645201] [2022-03-20 09:05:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:59,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:59,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:59,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:05:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:59,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 09:05:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:00,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:00,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085645201] [2022-03-20 09:06:00,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085645201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:00,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590641211] [2022-03-20 09:06:00,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:06:00,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:00,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:00,126 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:00,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 09:06:00,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:06:00,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:06:00,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 09:06:00,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:01,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:06:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:02,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590641211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:06:02,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:06:02,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2022-03-20 09:06:02,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246488606] [2022-03-20 09:06:02,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:06:02,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-20 09:06:02,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:06:02,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-20 09:06:02,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 09:06:02,258 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:06:03,305 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-03-20 09:06:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 09:06:03,305 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 91 [2022-03-20 09:06:03,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:06:03,306 INFO L225 Difference]: With dead ends: 113 [2022-03-20 09:06:03,306 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 09:06:03,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9988 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3415, Invalid=18341, Unknown=0, NotChecked=0, Total=21756 [2022-03-20 09:06:03,307 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 178 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:06:03,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 105 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:06:03,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 09:06:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-03-20 09:06:03,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 92 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:06:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-03-20 09:06:03,316 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 91 [2022-03-20 09:06:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:06:03,316 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-03-20 09:06:03,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-03-20 09:06:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 09:06:03,317 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:06:03,317 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:06:03,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-20 09:06:03,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-20 09:06:03,531 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:06:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:06:03,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1922779555, now seen corresponding path program 29 times [2022-03-20 09:06:03,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:06:03,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543466085] [2022-03-20 09:06:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:06:03,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:06:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:03,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:03,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:06:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:03,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 09:06:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:04,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:04,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543466085] [2022-03-20 09:06:04,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543466085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:04,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955175521] [2022-03-20 09:06:04,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:06:04,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:04,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:04,022 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:04,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 09:06:04,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-03-20 09:06:04,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:06:04,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 09:06:04,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:05,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:06:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:06,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955175521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:06:06,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:06:06,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2022-03-20 09:06:06,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202332788] [2022-03-20 09:06:06,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:06:06,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-20 09:06:06,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:06:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-20 09:06:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 09:06:06,431 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:07,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:06:07,741 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-03-20 09:06:07,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 09:06:07,742 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 93 [2022-03-20 09:06:07,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:06:07,742 INFO L225 Difference]: With dead ends: 126 [2022-03-20 09:06:07,742 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 09:06:07,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11451 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3797, Invalid=21325, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 09:06:07,745 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:06:07,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 102 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:06:07,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 09:06:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-03-20 09:06:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 93 states have (on average 1.053763440860215) internal successors, (98), 95 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:06:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-03-20 09:06:07,754 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 93 [2022-03-20 09:06:07,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:06:07,755 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-03-20 09:06:07,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-03-20 09:06:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 09:06:07,755 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:06:07,755 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:06:07,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 09:06:07,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-03-20 09:06:07,967 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:06:07,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:06:07,968 INFO L85 PathProgramCache]: Analyzing trace with hash -805273407, now seen corresponding path program 29 times [2022-03-20 09:06:07,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:06:07,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504640099] [2022-03-20 09:06:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:06:07,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:06:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:07,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:07,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:06:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:08,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 09:06:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:08,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:08,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504640099] [2022-03-20 09:06:08,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504640099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:08,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303920817] [2022-03-20 09:06:08,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:06:08,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:08,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:08,557 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:08,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 09:06:08,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-03-20 09:06:08,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:06:08,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 09:06:08,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:09,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:06:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:10,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303920817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:06:10,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:06:10,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2022-03-20 09:06:10,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935918547] [2022-03-20 09:06:10,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:06:10,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-20 09:06:10,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:06:10,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-20 09:06:10,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 09:06:10,910 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:06:12,251 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2022-03-20 09:06:12,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 09:06:12,256 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 93 [2022-03-20 09:06:12,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:06:12,256 INFO L225 Difference]: With dead ends: 121 [2022-03-20 09:06:12,256 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 09:06:12,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11468 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3797, Invalid=21325, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 09:06:12,258 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 149 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:06:12,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 110 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:06:12,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 09:06:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2022-03-20 09:06:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 96 states have (on average 1.0625) internal successors, (102), 98 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:06:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2022-03-20 09:06:12,268 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 93 [2022-03-20 09:06:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:06:12,268 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2022-03-20 09:06:12,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:12,268 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2022-03-20 09:06:12,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 09:06:12,268 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:06:12,268 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:06:12,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-20 09:06:12,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:12,483 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:06:12,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:06:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1280775079, now seen corresponding path program 30 times [2022-03-20 09:06:12,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:06:12,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015309077] [2022-03-20 09:06:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:06:12,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:06:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:12,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:12,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:06:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:12,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 09:06:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:12,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:12,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015309077] [2022-03-20 09:06:12,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015309077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:12,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634372861] [2022-03-20 09:06:12,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:06:12,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:12,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:12,963 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:12,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 09:06:13,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-20 09:06:13,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:06:13,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 09:06:13,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:13,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:06:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:15,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634372861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:06:15,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:06:15,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2022-03-20 09:06:15,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723020608] [2022-03-20 09:06:15,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:06:15,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-20 09:06:15,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:06:15,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-20 09:06:15,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 09:06:15,299 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:16,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:06:16,446 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-03-20 09:06:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 09:06:16,446 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 95 [2022-03-20 09:06:16,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:06:16,447 INFO L225 Difference]: With dead ends: 123 [2022-03-20 09:06:16,447 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 09:06:16,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11280 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3793, Invalid=20387, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 09:06:16,449 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 197 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:06:16,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 92 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:06:16,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 09:06:16,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2022-03-20 09:06:16,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 97 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:06:16,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2022-03-20 09:06:16,460 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 95 [2022-03-20 09:06:16,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:06:16,460 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2022-03-20 09:06:16,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:16,461 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2022-03-20 09:06:16,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 09:06:16,461 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:06:16,461 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:06:16,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-20 09:06:16,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:16,662 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:06:16,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:06:16,662 INFO L85 PathProgramCache]: Analyzing trace with hash -565811172, now seen corresponding path program 30 times [2022-03-20 09:06:16,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:06:16,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902621645] [2022-03-20 09:06:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:06:16,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:06:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:16,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:16,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:06:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:16,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 09:06:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:17,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:17,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902621645] [2022-03-20 09:06:17,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902621645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:17,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092537585] [2022-03-20 09:06:17,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:06:17,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:17,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:17,234 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:17,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 09:06:17,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-20 09:06:17,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:06:17,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 09:06:17,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:18,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:06:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:19,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092537585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:06:19,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:06:19,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2022-03-20 09:06:19,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557361555] [2022-03-20 09:06:19,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:06:19,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-20 09:06:19,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:06:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-20 09:06:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 09:06:19,414 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:06:20,545 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2022-03-20 09:06:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 09:06:20,545 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 95 [2022-03-20 09:06:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:06:20,546 INFO L225 Difference]: With dead ends: 117 [2022-03-20 09:06:20,546 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 09:06:20,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11179 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3793, Invalid=20387, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 09:06:20,548 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 152 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:06:20,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 95 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:06:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 09:06:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-03-20 09:06:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 96 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:06:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2022-03-20 09:06:20,558 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 95 [2022-03-20 09:06:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:06:20,558 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2022-03-20 09:06:20,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2022-03-20 09:06:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 09:06:20,559 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:06:20,559 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:06:20,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-20 09:06:20,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-20 09:06:20,775 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:06:20,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:06:20,776 INFO L85 PathProgramCache]: Analyzing trace with hash -534754174, now seen corresponding path program 31 times [2022-03-20 09:06:20,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:06:20,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915023662] [2022-03-20 09:06:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:06:20,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:06:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:20,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:20,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:06:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:21,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 09:06:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:21,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:21,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915023662] [2022-03-20 09:06:21,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915023662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:21,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165084173] [2022-03-20 09:06:21,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:06:21,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:21,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:21,282 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:21,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 09:06:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:21,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 09:06:21,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:22,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:06:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:23,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165084173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:06:23,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:06:23,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2022-03-20 09:06:23,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422584420] [2022-03-20 09:06:23,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:06:23,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-03-20 09:06:23,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:06:23,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-03-20 09:06:23,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 09:06:23,975 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:25,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:06:25,523 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2022-03-20 09:06:25,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 09:06:25,524 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 97 [2022-03-20 09:06:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:06:25,524 INFO L225 Difference]: With dead ends: 130 [2022-03-20 09:06:25,525 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 09:06:25,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12725 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4193, Invalid=23529, Unknown=0, NotChecked=0, Total=27722 [2022-03-20 09:06:25,527 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:06:25,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 127 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:06:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 09:06:25,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-03-20 09:06:25,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 99 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:06:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2022-03-20 09:06:25,538 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 97 [2022-03-20 09:06:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:06:25,538 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2022-03-20 09:06:25,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2022-03-20 09:06:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 09:06:25,539 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:06:25,539 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:06:25,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-20 09:06:25,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-20 09:06:25,739 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:06:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:06:25,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2041870304, now seen corresponding path program 31 times [2022-03-20 09:06:25,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:06:25,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919477475] [2022-03-20 09:06:25,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:06:25,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:06:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:25,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:25,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:06:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:26,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 09:06:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:26,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:26,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919477475] [2022-03-20 09:06:26,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919477475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:26,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021729260] [2022-03-20 09:06:26,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:06:26,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:26,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:26,411 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:26,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 09:06:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:26,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 09:06:26,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:27,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:06:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:28,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021729260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:06:28,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:06:28,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2022-03-20 09:06:28,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755693946] [2022-03-20 09:06:28,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:06:28,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-03-20 09:06:28,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:06:28,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-03-20 09:06:28,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 09:06:28,967 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:30,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:06:30,326 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2022-03-20 09:06:30,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 09:06:30,327 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 97 [2022-03-20 09:06:30,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:06:30,327 INFO L225 Difference]: With dead ends: 125 [2022-03-20 09:06:30,328 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 09:06:30,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12743 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4193, Invalid=23529, Unknown=0, NotChecked=0, Total=27722 [2022-03-20 09:06:30,339 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 222 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:06:30,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 90 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:06:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 09:06:30,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-03-20 09:06:30,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 100 states have (on average 1.06) internal successors, (106), 102 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:06:30,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2022-03-20 09:06:30,352 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 97 [2022-03-20 09:06:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:06:30,352 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2022-03-20 09:06:30,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:30,352 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2022-03-20 09:06:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 09:06:30,353 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:06:30,353 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:06:30,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-20 09:06:30,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:30,567 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:06:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:06:30,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1491713798, now seen corresponding path program 32 times [2022-03-20 09:06:30,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:06:30,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915515638] [2022-03-20 09:06:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:06:30,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:06:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:30,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:30,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:06:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:30,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 09:06:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:31,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:31,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915515638] [2022-03-20 09:06:31,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915515638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:31,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202254313] [2022-03-20 09:06:31,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:06:31,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:31,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:31,088 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:31,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 09:06:31,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:06:31,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:06:31,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 09:06:31,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:32,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:06:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:33,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202254313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:06:33,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:06:33,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2022-03-20 09:06:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531575321] [2022-03-20 09:06:33,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:06:33,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-03-20 09:06:33,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:06:33,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-03-20 09:06:33,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 09:06:33,589 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:06:34,841 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2022-03-20 09:06:34,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 09:06:34,841 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 99 [2022-03-20 09:06:34,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:06:34,842 INFO L225 Difference]: With dead ends: 127 [2022-03-20 09:06:34,842 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 09:06:34,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12544 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4191, Invalid=22541, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 09:06:34,843 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 157 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:06:34,844 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 102 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:06:34,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 09:06:34,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-03-20 09:06:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 101 states have internal predecessors, (104), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:06:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-03-20 09:06:34,854 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 99 [2022-03-20 09:06:34,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:06:34,855 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-03-20 09:06:34,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-03-20 09:06:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 09:06:34,855 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:06:34,855 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:06:34,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-20 09:06:35,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-20 09:06:35,064 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:06:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:06:35,064 INFO L85 PathProgramCache]: Analyzing trace with hash 733316731, now seen corresponding path program 32 times [2022-03-20 09:06:35,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:06:35,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408704214] [2022-03-20 09:06:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:06:35,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:06:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:35,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:35,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:06:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:35,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 09:06:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:35,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:35,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408704214] [2022-03-20 09:06:35,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408704214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:35,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831646893] [2022-03-20 09:06:35,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:06:35,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:35,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:35,719 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:35,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 09:06:35,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:06:35,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:06:35,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 09:06:35,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:36,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:06:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:38,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831646893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:06:38,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:06:38,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2022-03-20 09:06:38,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128049752] [2022-03-20 09:06:38,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:06:38,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-03-20 09:06:38,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:06:38,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-03-20 09:06:38,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 09:06:38,177 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:39,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:06:39,504 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2022-03-20 09:06:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 09:06:39,505 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 99 [2022-03-20 09:06:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:06:39,505 INFO L225 Difference]: With dead ends: 121 [2022-03-20 09:06:39,505 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 09:06:39,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12437 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4191, Invalid=22541, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 09:06:39,508 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 140 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:06:39,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 125 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:06:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 09:06:39,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-03-20 09:06:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 100 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:06:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-03-20 09:06:39,519 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 99 [2022-03-20 09:06:39,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:06:39,519 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-03-20 09:06:39,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-03-20 09:06:39,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 09:06:39,519 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:06:39,519 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:06:39,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-20 09:06:39,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:39,735 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:06:39,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:06:39,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1908322527, now seen corresponding path program 33 times [2022-03-20 09:06:39,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:06:39,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417809683] [2022-03-20 09:06:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:06:39,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:06:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:39,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:39,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:06:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:40,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 09:06:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:40,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:40,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417809683] [2022-03-20 09:06:40,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417809683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:40,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320131878] [2022-03-20 09:06:40,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:06:40,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:40,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:40,301 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:40,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 09:06:40,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-03-20 09:06:40,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:06:40,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 09:06:40,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:41,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:06:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:43,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320131878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:06:43,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:06:43,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2022-03-20 09:06:43,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700856881] [2022-03-20 09:06:43,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:06:43,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-03-20 09:06:43,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:06:43,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-03-20 09:06:43,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 09:06:43,091 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:06:44,702 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-03-20 09:06:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 09:06:44,703 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 101 [2022-03-20 09:06:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:06:44,704 INFO L225 Difference]: With dead ends: 134 [2022-03-20 09:06:44,704 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 09:06:44,706 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14066 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4609, Invalid=25841, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 09:06:44,706 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:06:44,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 112 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:06:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 09:06:44,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2022-03-20 09:06:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 103 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:06:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2022-03-20 09:06:44,717 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 101 [2022-03-20 09:06:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:06:44,717 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2022-03-20 09:06:44,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2022-03-20 09:06:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 09:06:44,718 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:06:44,718 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:06:44,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-20 09:06:44,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:44,918 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:06:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:06:44,919 INFO L85 PathProgramCache]: Analyzing trace with hash 337141439, now seen corresponding path program 33 times [2022-03-20 09:06:44,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:06:44,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363371939] [2022-03-20 09:06:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:06:44,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:06:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:44,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:44,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:06:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:45,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 09:06:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:45,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:45,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363371939] [2022-03-20 09:06:45,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363371939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:45,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562115401] [2022-03-20 09:06:45,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:06:45,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:45,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:45,585 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:45,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 09:06:45,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-03-20 09:06:45,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:06:45,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 09:06:45,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:46,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:06:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:48,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562115401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:06:48,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:06:48,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2022-03-20 09:06:48,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660824851] [2022-03-20 09:06:48,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:06:48,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-03-20 09:06:48,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:06:48,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-03-20 09:06:48,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 09:06:48,332 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:06:49,862 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2022-03-20 09:06:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 09:06:49,862 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 101 [2022-03-20 09:06:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:06:49,863 INFO L225 Difference]: With dead ends: 129 [2022-03-20 09:06:49,863 INFO L226 Difference]: Without dead ends: 120 [2022-03-20 09:06:49,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14085 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4609, Invalid=25841, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 09:06:49,865 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 168 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:06:49,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 120 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:06:49,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-20 09:06:49,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2022-03-20 09:06:49,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 104 states have (on average 1.0576923076923077) internal successors, (110), 106 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:06:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2022-03-20 09:06:49,877 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 101 [2022-03-20 09:06:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:06:49,877 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2022-03-20 09:06:49,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:49,877 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2022-03-20 09:06:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 09:06:49,878 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:06:49,878 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:06:49,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-20 09:06:50,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-20 09:06:50,078 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:06:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:06:50,079 INFO L85 PathProgramCache]: Analyzing trace with hash -370185691, now seen corresponding path program 34 times [2022-03-20 09:06:50,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:06:50,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060952548] [2022-03-20 09:06:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:06:50,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:06:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:50,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:50,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:06:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:50,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 09:06:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:50,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:50,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060952548] [2022-03-20 09:06:50,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060952548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:50,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258628155] [2022-03-20 09:06:50,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:06:50,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:50,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:50,655 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:50,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 09:06:50,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:06:50,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:06:50,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 09:06:50,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:51,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:06:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:53,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258628155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:06:53,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:06:53,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2022-03-20 09:06:53,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810458661] [2022-03-20 09:06:53,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:06:53,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-03-20 09:06:53,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:06:53,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-03-20 09:06:53,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 09:06:53,361 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:54,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:06:54,775 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2022-03-20 09:06:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 09:06:54,775 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2022-03-20 09:06:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:06:54,776 INFO L225 Difference]: With dead ends: 131 [2022-03-20 09:06:54,776 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 09:06:54,778 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13875 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4609, Invalid=24803, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 09:06:54,778 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 148 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:06:54,778 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 112 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:06:54,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 09:06:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2022-03-20 09:06:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 105 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:06:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-03-20 09:06:54,790 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 103 [2022-03-20 09:06:54,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:06:54,790 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-03-20 09:06:54,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-03-20 09:06:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 09:06:54,791 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:06:54,791 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:06:54,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 09:06:55,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:55,003 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:06:55,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:06:55,004 INFO L85 PathProgramCache]: Analyzing trace with hash 944170138, now seen corresponding path program 34 times [2022-03-20 09:06:55,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:06:55,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024656899] [2022-03-20 09:06:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:06:55,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:06:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:55,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:55,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:06:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:55,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 09:06:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:55,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:55,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024656899] [2022-03-20 09:06:55,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024656899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:55,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177366246] [2022-03-20 09:06:55,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:06:55,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:55,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:55,691 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:55,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 09:06:55,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:06:55,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:06:55,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 09:06:55,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:56,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:06:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:06:58,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177366246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:06:58,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:06:58,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2022-03-20 09:06:58,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325810982] [2022-03-20 09:06:58,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:06:58,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-03-20 09:06:58,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:06:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-03-20 09:06:58,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 09:06:58,288 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:06:59,592 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-03-20 09:06:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 09:06:59,592 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2022-03-20 09:06:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:06:59,592 INFO L225 Difference]: With dead ends: 125 [2022-03-20 09:06:59,592 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 09:06:59,594 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13762 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4609, Invalid=24803, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 09:06:59,594 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 148 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:06:59,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 100 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:06:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 09:06:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-03-20 09:06:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 104 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:06:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-03-20 09:06:59,605 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 103 [2022-03-20 09:06:59,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:06:59,606 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-03-20 09:06:59,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:06:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-03-20 09:06:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 09:06:59,606 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:06:59,606 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:06:59,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-20 09:06:59,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:59,811 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:06:59,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:06:59,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1141661312, now seen corresponding path program 35 times [2022-03-20 09:06:59,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:06:59,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626548221] [2022-03-20 09:06:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:06:59,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:06:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:59,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:59,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:06:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:00,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 09:07:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:00,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:07:00,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626548221] [2022-03-20 09:07:00,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626548221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:07:00,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163259475] [2022-03-20 09:07:00,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:07:00,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:00,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:07:00,386 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:07:00,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 09:07:00,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-03-20 09:07:00,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:07:00,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 09:07:00,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:07:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:01,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:07:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:03,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163259475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:07:03,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:07:03,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2022-03-20 09:07:03,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358387687] [2022-03-20 09:07:03,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:07:03,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-03-20 09:07:03,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:07:03,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-03-20 09:07:03,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 09:07:03,427 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:05,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:07:05,036 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2022-03-20 09:07:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 09:07:05,037 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2022-03-20 09:07:05,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:07:05,037 INFO L225 Difference]: With dead ends: 138 [2022-03-20 09:07:05,037 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 09:07:05,039 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15474 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5045, Invalid=28261, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 09:07:05,040 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 209 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:07:05,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 127 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:07:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 09:07:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2022-03-20 09:07:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 107 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:07:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2022-03-20 09:07:05,051 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 105 [2022-03-20 09:07:05,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:07:05,051 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2022-03-20 09:07:05,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:05,051 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2022-03-20 09:07:05,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 09:07:05,052 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:07:05,052 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:07:05,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-20 09:07:05,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:05,259 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:07:05,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:07:05,260 INFO L85 PathProgramCache]: Analyzing trace with hash 686130526, now seen corresponding path program 35 times [2022-03-20 09:07:05,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:07:05,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653312514] [2022-03-20 09:07:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:07:05,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:07:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:05,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:07:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:05,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:07:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:05,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 09:07:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:05,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:07:05,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653312514] [2022-03-20 09:07:05,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653312514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:07:05,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60855758] [2022-03-20 09:07:05,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:07:05,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:05,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:07:05,963 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:07:05,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 09:07:06,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-03-20 09:07:06,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:07:06,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 09:07:06,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:07:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:07,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:07:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:08,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60855758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:07:08,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:07:08,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2022-03-20 09:07:08,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878322448] [2022-03-20 09:07:08,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:07:08,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-03-20 09:07:08,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:07:08,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-03-20 09:07:08,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 09:07:08,829 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:10,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:07:10,587 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2022-03-20 09:07:10,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 09:07:10,588 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2022-03-20 09:07:10,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:07:10,588 INFO L225 Difference]: With dead ends: 133 [2022-03-20 09:07:10,588 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 09:07:10,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15494 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5045, Invalid=28261, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 09:07:10,591 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:07:10,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 120 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:07:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 09:07:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2022-03-20 09:07:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 108 states have (on average 1.0555555555555556) internal successors, (114), 110 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:07:10,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2022-03-20 09:07:10,604 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 105 [2022-03-20 09:07:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:07:10,604 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2022-03-20 09:07:10,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2022-03-20 09:07:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 09:07:10,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:07:10,604 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:07:10,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-20 09:07:10,817 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-20 09:07:10,818 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:07:10,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:07:10,818 INFO L85 PathProgramCache]: Analyzing trace with hash 877828, now seen corresponding path program 36 times [2022-03-20 09:07:10,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:07:10,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680809694] [2022-03-20 09:07:10,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:07:10,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:07:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:10,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:07:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:10,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:07:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:11,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 09:07:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:11,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:07:11,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680809694] [2022-03-20 09:07:11,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680809694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:07:11,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411532725] [2022-03-20 09:07:11,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:07:11,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:11,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:07:11,473 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:07:11,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 09:07:11,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-03-20 09:07:11,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:07:11,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 09:07:11,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:07:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:12,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:07:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:14,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411532725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:07:14,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:07:14,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2022-03-20 09:07:14,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561036335] [2022-03-20 09:07:14,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:07:14,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-03-20 09:07:14,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:07:14,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-03-20 09:07:14,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 09:07:14,550 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:07:15,988 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2022-03-20 09:07:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 09:07:15,989 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 107 [2022-03-20 09:07:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:07:15,989 INFO L225 Difference]: With dead ends: 135 [2022-03-20 09:07:15,989 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 09:07:15,991 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15273 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5047, Invalid=27173, Unknown=0, NotChecked=0, Total=32220 [2022-03-20 09:07:15,991 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 144 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:07:15,991 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 107 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:07:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 09:07:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2022-03-20 09:07:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 109 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:07:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2022-03-20 09:07:16,004 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 107 [2022-03-20 09:07:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:07:16,004 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2022-03-20 09:07:16,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2022-03-20 09:07:16,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 09:07:16,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:07:16,004 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:07:16,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-20 09:07:16,210 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:16,211 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:07:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:07:16,211 INFO L85 PathProgramCache]: Analyzing trace with hash 365941369, now seen corresponding path program 36 times [2022-03-20 09:07:16,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:07:16,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595505393] [2022-03-20 09:07:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:07:16,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:07:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:16,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:07:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:16,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:07:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:16,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 09:07:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:16,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:07:16,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595505393] [2022-03-20 09:07:16,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595505393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:07:16,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951897415] [2022-03-20 09:07:16,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:07:16,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:16,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:07:16,946 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:07:16,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 09:07:17,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-03-20 09:07:17,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:07:17,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 09:07:17,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:07:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:18,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:07:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:19,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951897415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:07:19,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:07:19,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2022-03-20 09:07:19,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771261948] [2022-03-20 09:07:19,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:07:19,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-03-20 09:07:19,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:07:19,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-03-20 09:07:19,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 09:07:19,727 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:21,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:07:21,166 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2022-03-20 09:07:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 09:07:21,166 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 107 [2022-03-20 09:07:21,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:07:21,167 INFO L225 Difference]: With dead ends: 129 [2022-03-20 09:07:21,167 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 09:07:21,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15154 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5047, Invalid=27173, Unknown=0, NotChecked=0, Total=32220 [2022-03-20 09:07:21,169 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 213 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:07:21,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 110 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:07:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 09:07:21,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-03-20 09:07:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 108 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:07:21,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-03-20 09:07:21,182 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 107 [2022-03-20 09:07:21,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:07:21,182 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-03-20 09:07:21,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:21,182 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-03-20 09:07:21,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 09:07:21,183 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:07:21,183 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:07:21,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-20 09:07:21,385 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:21,385 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:07:21,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:07:21,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1526240159, now seen corresponding path program 37 times [2022-03-20 09:07:21,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:07:21,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425701997] [2022-03-20 09:07:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:07:21,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:07:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:21,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:07:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:21,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:07:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:21,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 09:07:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:22,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:07:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425701997] [2022-03-20 09:07:22,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425701997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:07:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877935701] [2022-03-20 09:07:22,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:07:22,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:22,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:07:22,042 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:07:22,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 09:07:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:22,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 09:07:22,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:07:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:23,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:07:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:25,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877935701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:07:25,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:07:25,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2022-03-20 09:07:25,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195170374] [2022-03-20 09:07:25,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:07:25,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-03-20 09:07:25,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:07:25,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-03-20 09:07:25,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 09:07:25,279 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:07:27,011 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2022-03-20 09:07:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 09:07:27,012 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 109 [2022-03-20 09:07:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:07:27,012 INFO L225 Difference]: With dead ends: 142 [2022-03-20 09:07:27,012 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 09:07:27,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16949 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5501, Invalid=30789, Unknown=0, NotChecked=0, Total=36290 [2022-03-20 09:07:27,015 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 207 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:07:27,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 132 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:07:27,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 09:07:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2022-03-20 09:07:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 111 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:07:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-03-20 09:07:27,028 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 109 [2022-03-20 09:07:27,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:07:27,028 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-03-20 09:07:27,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:27,029 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-03-20 09:07:27,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 09:07:27,029 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:07:27,029 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:07:27,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-20 09:07:27,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-20 09:07:27,230 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:07:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:07:27,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1403075517, now seen corresponding path program 37 times [2022-03-20 09:07:27,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:07:27,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42535133] [2022-03-20 09:07:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:07:27,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:07:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:27,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:07:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:27,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:07:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:27,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 09:07:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:28,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:07:28,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42535133] [2022-03-20 09:07:28,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42535133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:07:28,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705750905] [2022-03-20 09:07:28,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:07:28,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:28,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:07:28,028 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:07:28,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 09:07:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:28,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 09:07:28,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:07:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:29,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:07:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:31,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705750905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:07:31,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:07:31,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2022-03-20 09:07:31,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942948015] [2022-03-20 09:07:31,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:07:31,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-03-20 09:07:31,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:07:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-03-20 09:07:31,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 09:07:31,096 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:32,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:07:32,698 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2022-03-20 09:07:32,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 09:07:32,698 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 109 [2022-03-20 09:07:32,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:07:32,699 INFO L225 Difference]: With dead ends: 137 [2022-03-20 09:07:32,699 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 09:07:32,700 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16970 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5501, Invalid=30789, Unknown=0, NotChecked=0, Total=36290 [2022-03-20 09:07:32,701 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 293 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:07:32,701 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 90 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:07:32,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 09:07:32,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2022-03-20 09:07:32,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 112 states have (on average 1.0535714285714286) internal successors, (118), 114 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:07:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2022-03-20 09:07:32,713 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 109 [2022-03-20 09:07:32,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:07:32,714 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2022-03-20 09:07:32,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:32,714 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2022-03-20 09:07:32,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 09:07:32,714 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:07:32,714 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:07:32,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-20 09:07:32,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:32,931 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:07:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:07:32,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1790246819, now seen corresponding path program 38 times [2022-03-20 09:07:32,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:07:32,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20349412] [2022-03-20 09:07:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:07:32,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:07:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:32,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:07:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:32,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:07:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:33,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 09:07:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:33,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:07:33,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20349412] [2022-03-20 09:07:33,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20349412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:07:33,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277699507] [2022-03-20 09:07:33,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:07:33,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:33,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:07:33,569 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:07:33,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 09:07:33,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:07:33,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:07:33,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 09:07:33,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:07:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:34,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:07:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:36,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277699507] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:07:36,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:07:36,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 140 [2022-03-20 09:07:36,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386308561] [2022-03-20 09:07:36,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:07:36,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-20 09:07:36,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:07:36,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-20 09:07:36,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3233, Invalid=16227, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 09:07:36,691 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:38,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:07:38,254 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2022-03-20 09:07:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 09:07:38,254 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 111 [2022-03-20 09:07:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:07:38,255 INFO L225 Difference]: With dead ends: 139 [2022-03-20 09:07:38,255 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 09:07:38,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16738 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5505, Invalid=29651, Unknown=0, NotChecked=0, Total=35156 [2022-03-20 09:07:38,257 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:07:38,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 122 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:07:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 09:07:38,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2022-03-20 09:07:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 111 states have (on average 1.045045045045045) internal successors, (116), 113 states have internal predecessors, (116), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:07:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2022-03-20 09:07:38,270 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 111 [2022-03-20 09:07:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:07:38,271 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2022-03-20 09:07:38,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2022-03-20 09:07:38,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 09:07:38,271 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:07:38,271 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:07:38,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-20 09:07:38,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:38,490 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:07:38,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:07:38,490 INFO L85 PathProgramCache]: Analyzing trace with hash 418488344, now seen corresponding path program 38 times [2022-03-20 09:07:38,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:07:38,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724887451] [2022-03-20 09:07:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:07:38,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:07:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:38,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:07:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:38,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:07:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:38,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 09:07:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:39,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:07:39,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724887451] [2022-03-20 09:07:39,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724887451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:07:39,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762003171] [2022-03-20 09:07:39,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:07:39,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:39,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:07:39,297 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:07:39,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 09:07:39,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:07:39,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:07:39,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 09:07:39,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:07:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:40,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:07:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:42,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762003171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:07:42,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:07:42,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 140 [2022-03-20 09:07:42,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832901915] [2022-03-20 09:07:42,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:07:42,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-20 09:07:42,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:07:42,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-20 09:07:42,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3233, Invalid=16227, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 09:07:42,283 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:43,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:07:43,705 INFO L93 Difference]: Finished difference Result 133 states and 136 transitions. [2022-03-20 09:07:43,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 09:07:43,705 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 111 [2022-03-20 09:07:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:07:43,706 INFO L225 Difference]: With dead ends: 133 [2022-03-20 09:07:43,706 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 09:07:43,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16613 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5505, Invalid=29651, Unknown=0, NotChecked=0, Total=35156 [2022-03-20 09:07:43,708 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 190 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:07:43,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 85 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:07:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 09:07:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-03-20 09:07:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 112 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:07:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-03-20 09:07:43,721 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 111 [2022-03-20 09:07:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:07:43,721 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-03-20 09:07:43,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-03-20 09:07:43,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 09:07:43,722 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:07:43,722 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:07:43,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-20 09:07:43,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:43,939 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:07:43,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:07:43,939 INFO L85 PathProgramCache]: Analyzing trace with hash 484275582, now seen corresponding path program 39 times [2022-03-20 09:07:43,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:07:43,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554465175] [2022-03-20 09:07:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:07:43,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:07:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:43,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:07:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:43,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:07:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:44,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 09:07:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:44,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:07:44,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554465175] [2022-03-20 09:07:44,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554465175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:07:44,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269423296] [2022-03-20 09:07:44,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:07:44,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:44,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:07:44,610 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:07:44,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 09:07:44,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-20 09:07:44,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:07:44,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 09:07:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:07:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:46,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:07:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:48,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269423296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:07:48,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:07:48,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 147 [2022-03-20 09:07:48,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227696767] [2022-03-20 09:07:48,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:07:48,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-03-20 09:07:48,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:07:48,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-03-20 09:07:48,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=17983, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 09:07:48,013 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:07:49,791 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2022-03-20 09:07:49,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 09:07:49,791 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 113 [2022-03-20 09:07:49,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:07:49,792 INFO L225 Difference]: With dead ends: 146 [2022-03-20 09:07:49,792 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 09:07:49,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18491 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5977, Invalid=33425, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 09:07:49,794 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 229 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:07:49,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 112 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:07:49,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 09:07:49,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 125. [2022-03-20 09:07:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 115 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:07:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-03-20 09:07:49,809 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 113 [2022-03-20 09:07:49,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:07:49,809 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-03-20 09:07:49,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:49,809 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-03-20 09:07:49,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 09:07:49,810 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:07:49,810 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:07:49,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-20 09:07:50,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-20 09:07:50,027 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:07:50,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:07:50,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1902325284, now seen corresponding path program 39 times [2022-03-20 09:07:50,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:07:50,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863911464] [2022-03-20 09:07:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:07:50,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:07:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:50,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:07:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:50,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:07:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:50,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 09:07:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:50,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:07:50,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863911464] [2022-03-20 09:07:50,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863911464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:07:50,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954074149] [2022-03-20 09:07:50,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:07:50,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:50,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:07:50,877 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:07:50,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 09:07:51,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-20 09:07:51,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:07:51,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 09:07:51,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:07:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:52,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:07:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:54,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954074149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:07:54,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:07:54,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 147 [2022-03-20 09:07:54,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618975944] [2022-03-20 09:07:54,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:07:54,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-03-20 09:07:54,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:07:54,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-03-20 09:07:54,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=17983, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 09:07:54,134 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:55,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:07:55,938 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2022-03-20 09:07:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 09:07:55,938 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 113 [2022-03-20 09:07:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:07:55,950 INFO L225 Difference]: With dead ends: 141 [2022-03-20 09:07:55,950 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 09:07:55,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18513 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5977, Invalid=33425, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 09:07:55,953 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 239 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:07:55,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 120 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:07:55,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 09:07:55,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2022-03-20 09:07:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 116 states have (on average 1.0517241379310345) internal successors, (122), 118 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:07:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2022-03-20 09:07:55,968 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 113 [2022-03-20 09:07:55,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:07:55,968 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2022-03-20 09:07:55,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:07:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2022-03-20 09:07:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 09:07:55,970 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:07:55,970 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:07:55,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-20 09:07:56,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:56,179 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:07:56,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:07:56,180 INFO L85 PathProgramCache]: Analyzing trace with hash -719091198, now seen corresponding path program 40 times [2022-03-20 09:07:56,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:07:56,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576060984] [2022-03-20 09:07:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:07:56,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:07:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:56,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:07:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:56,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:07:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:56,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 09:07:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:07:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:56,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:07:56,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576060984] [2022-03-20 09:07:56,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576060984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:07:56,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104375277] [2022-03-20 09:07:56,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:07:56,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:56,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:07:56,844 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:07:56,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 09:07:57,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:07:57,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:07:57,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 09:07:57,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:07:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:07:58,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:08:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:00,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104375277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:08:00,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:08:00,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 51] total 146 [2022-03-20 09:08:00,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952039142] [2022-03-20 09:08:00,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:08:00,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-03-20 09:08:00,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:00,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-03-20 09:08:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3517, Invalid=17653, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 09:08:00,141 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:01,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:01,730 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2022-03-20 09:08:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 09:08:01,730 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 115 [2022-03-20 09:08:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:01,731 INFO L225 Difference]: With dead ends: 143 [2022-03-20 09:08:01,731 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 09:08:01,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18270 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5983, Invalid=32237, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 09:08:01,733 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 174 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:01,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 102 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:08:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 09:08:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2022-03-20 09:08:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 117 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:08:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-03-20 09:08:01,747 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 115 [2022-03-20 09:08:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:01,747 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-03-20 09:08:01,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:01,747 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-03-20 09:08:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 09:08:01,748 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:01,748 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:01,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-20 09:08:01,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:01,948 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:01,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash -434528905, now seen corresponding path program 40 times [2022-03-20 09:08:01,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:01,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790586126] [2022-03-20 09:08:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:01,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:01,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:08:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:01,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:08:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:02,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 09:08:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:02,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:02,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790586126] [2022-03-20 09:08:02,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790586126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:08:02,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923499812] [2022-03-20 09:08:02,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:08:02,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:02,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:02,760 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:02,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-20 09:08:02,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:08:02,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:08:02,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 09:08:02,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:04,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:08:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:05,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923499812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:08:05,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:08:05,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 51] total 146 [2022-03-20 09:08:05,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706628162] [2022-03-20 09:08:05,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:08:05,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-03-20 09:08:05,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:05,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-03-20 09:08:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3517, Invalid=17653, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 09:08:05,849 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:07,420 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-03-20 09:08:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 09:08:07,420 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 115 [2022-03-20 09:08:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:07,421 INFO L225 Difference]: With dead ends: 137 [2022-03-20 09:08:07,421 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 09:08:07,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18139 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5983, Invalid=32237, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 09:08:07,423 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 196 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:07,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 105 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:08:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 09:08:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-03-20 09:08:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 116 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:08:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-03-20 09:08:07,437 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 115 [2022-03-20 09:08:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:07,437 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-03-20 09:08:07,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-03-20 09:08:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 09:08:07,438 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:07,438 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:07,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-20 09:08:07,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-03-20 09:08:07,655 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:07,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1073452829, now seen corresponding path program 41 times [2022-03-20 09:08:07,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:07,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090372226] [2022-03-20 09:08:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:07,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:07,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:08:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:07,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:08:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:08,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 09:08:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:08,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:08,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090372226] [2022-03-20 09:08:08,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090372226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:08:08,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787513396] [2022-03-20 09:08:08,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:08:08,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:08,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:08,369 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:08,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-20 09:08:08,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-03-20 09:08:08,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:08:08,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 09:08:08,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:09,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:08:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:12,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787513396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:08:12,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:08:12,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 153 [2022-03-20 09:08:12,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189194676] [2022-03-20 09:08:12,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:08:12,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-03-20 09:08:12,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:12,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-03-20 09:08:12,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3773, Invalid=19483, Unknown=0, NotChecked=0, Total=23256 [2022-03-20 09:08:12,055 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:13,889 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2022-03-20 09:08:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 09:08:13,890 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 117 [2022-03-20 09:08:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:13,890 INFO L225 Difference]: With dead ends: 150 [2022-03-20 09:08:13,890 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 09:08:13,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20100 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6473, Invalid=36169, Unknown=0, NotChecked=0, Total=42642 [2022-03-20 09:08:13,893 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:13,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 102 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:08:13,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 09:08:13,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2022-03-20 09:08:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 119 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:08:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2022-03-20 09:08:13,907 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 117 [2022-03-20 09:08:13,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:13,907 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2022-03-20 09:08:13,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:13,907 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2022-03-20 09:08:13,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 09:08:13,908 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:13,908 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:13,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-20 09:08:14,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:14,122 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:14,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:14,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1073059771, now seen corresponding path program 41 times [2022-03-20 09:08:14,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:14,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963050129] [2022-03-20 09:08:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:14,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:14,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:08:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:14,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:08:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:14,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 09:08:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:14,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:14,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963050129] [2022-03-20 09:08:14,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963050129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:08:14,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170016754] [2022-03-20 09:08:14,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:08:14,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:14,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:14,991 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:14,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-20 09:08:15,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-03-20 09:08:15,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:08:15,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 09:08:15,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:16,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:08:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:18,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170016754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:08:18,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:08:18,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 153 [2022-03-20 09:08:18,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233851443] [2022-03-20 09:08:18,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:08:18,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-03-20 09:08:18,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:18,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-03-20 09:08:18,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3773, Invalid=19483, Unknown=0, NotChecked=0, Total=23256 [2022-03-20 09:08:18,417 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:20,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:20,281 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2022-03-20 09:08:20,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 09:08:20,281 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 117 [2022-03-20 09:08:20,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:20,282 INFO L225 Difference]: With dead ends: 145 [2022-03-20 09:08:20,282 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 09:08:20,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20123 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6473, Invalid=36169, Unknown=0, NotChecked=0, Total=42642 [2022-03-20 09:08:20,285 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 227 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:20,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 130 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:08:20,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 09:08:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2022-03-20 09:08:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 120 states have (on average 1.05) internal successors, (126), 122 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:08:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2022-03-20 09:08:20,311 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 117 [2022-03-20 09:08:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:20,311 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2022-03-20 09:08:20,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:20,311 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2022-03-20 09:08:20,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 09:08:20,312 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:20,312 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:20,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-20 09:08:20,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:20,519 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:20,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:20,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1822272479, now seen corresponding path program 42 times [2022-03-20 09:08:20,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:20,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197389454] [2022-03-20 09:08:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:20,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:20,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:08:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:20,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:08:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:20,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 09:08:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:21,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:21,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197389454] [2022-03-20 09:08:21,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197389454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:08:21,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625689483] [2022-03-20 09:08:21,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:08:21,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:21,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:21,210 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:21,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-20 09:08:21,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-03-20 09:08:21,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:08:21,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 09:08:21,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:22,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:08:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:24,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625689483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:08:24,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:08:24,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 53, 53] total 152 [2022-03-20 09:08:24,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779921946] [2022-03-20 09:08:24,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:08:24,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-03-20 09:08:24,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:24,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-03-20 09:08:24,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3813, Invalid=19139, Unknown=0, NotChecked=0, Total=22952 [2022-03-20 09:08:24,757 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:26,373 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2022-03-20 09:08:26,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 09:08:26,373 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 119 [2022-03-20 09:08:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:26,374 INFO L225 Difference]: With dead ends: 147 [2022-03-20 09:08:26,374 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 09:08:26,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19869 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6481, Invalid=34931, Unknown=0, NotChecked=0, Total=41412 [2022-03-20 09:08:26,376 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:26,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 92 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:08:26,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 09:08:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-03-20 09:08:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 121 states have internal predecessors, (124), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:08:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-03-20 09:08:26,391 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 119 [2022-03-20 09:08:26,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:26,391 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-03-20 09:08:26,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:26,391 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-03-20 09:08:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 09:08:26,392 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:26,392 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:26,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-20 09:08:26,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-20 09:08:26,603 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:26,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1048648342, now seen corresponding path program 42 times [2022-03-20 09:08:26,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:26,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136467973] [2022-03-20 09:08:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:26,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:26,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:08:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:26,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:08:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:26,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 09:08:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:27,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:27,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136467973] [2022-03-20 09:08:27,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136467973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:08:27,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394136234] [2022-03-20 09:08:27,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:08:27,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:27,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:27,490 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:27,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-20 09:08:27,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-03-20 09:08:27,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:08:27,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 09:08:27,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:28,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:08:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:30,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394136234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:08:30,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:08:30,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 53, 53] total 152 [2022-03-20 09:08:30,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244544553] [2022-03-20 09:08:30,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:08:30,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-03-20 09:08:30,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:30,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-03-20 09:08:30,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3813, Invalid=19139, Unknown=0, NotChecked=0, Total=22952 [2022-03-20 09:08:30,802 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:32,412 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2022-03-20 09:08:32,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 09:08:32,412 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 119 [2022-03-20 09:08:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:32,413 INFO L225 Difference]: With dead ends: 141 [2022-03-20 09:08:32,413 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 09:08:32,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19732 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6481, Invalid=34931, Unknown=0, NotChecked=0, Total=41412 [2022-03-20 09:08:32,415 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 223 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:32,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 100 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:08:32,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 09:08:32,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-03-20 09:08:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 120 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:08:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-03-20 09:08:32,430 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 119 [2022-03-20 09:08:32,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:32,430 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-03-20 09:08:32,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:32,430 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-03-20 09:08:32,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 09:08:32,430 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:32,431 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:32,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-20 09:08:32,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:32,635 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:32,635 INFO L85 PathProgramCache]: Analyzing trace with hash 477644924, now seen corresponding path program 43 times [2022-03-20 09:08:32,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:32,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10713364] [2022-03-20 09:08:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:32,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:32,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:08:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:32,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:08:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:33,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 09:08:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:33,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:33,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10713364] [2022-03-20 09:08:33,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10713364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:08:33,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226315521] [2022-03-20 09:08:33,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:08:33,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:33,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:33,369 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:33,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-20 09:08:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:33,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 09:08:33,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:34,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:08:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:37,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226315521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:08:37,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:08:37,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 159 [2022-03-20 09:08:37,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572740205] [2022-03-20 09:08:37,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:08:37,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-03-20 09:08:37,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:37,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-03-20 09:08:37,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4079, Invalid=21043, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 09:08:37,153 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:39,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:39,173 INFO L93 Difference]: Finished difference Result 154 states and 161 transitions. [2022-03-20 09:08:39,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 09:08:39,173 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2022-03-20 09:08:39,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:39,174 INFO L225 Difference]: With dead ends: 154 [2022-03-20 09:08:39,174 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 09:08:39,176 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21776 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6989, Invalid=39021, Unknown=0, NotChecked=0, Total=46010 [2022-03-20 09:08:39,176 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 170 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:39,176 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 112 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:08:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 09:08:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2022-03-20 09:08:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 123 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:08:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2022-03-20 09:08:39,192 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 121 [2022-03-20 09:08:39,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:39,192 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2022-03-20 09:08:39,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2022-03-20 09:08:39,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 09:08:39,193 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:39,193 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:39,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-20 09:08:39,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:39,407 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:39,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:39,408 INFO L85 PathProgramCache]: Analyzing trace with hash 110419290, now seen corresponding path program 43 times [2022-03-20 09:08:39,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:39,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122821237] [2022-03-20 09:08:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:39,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:39,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:08:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:39,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:08:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:39,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 09:08:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:40,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:40,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122821237] [2022-03-20 09:08:40,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122821237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:08:40,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010862309] [2022-03-20 09:08:40,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:08:40,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:40,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:40,336 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:40,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-20 09:08:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:40,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 09:08:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:41,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:08:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:43,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010862309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:08:43,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:08:43,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 159 [2022-03-20 09:08:43,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87489648] [2022-03-20 09:08:43,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:08:43,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-03-20 09:08:43,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:43,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-03-20 09:08:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4079, Invalid=21043, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 09:08:43,989 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:45,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:45,827 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2022-03-20 09:08:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 09:08:45,827 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2022-03-20 09:08:45,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:45,828 INFO L225 Difference]: With dead ends: 149 [2022-03-20 09:08:45,828 INFO L226 Difference]: Without dead ends: 140 [2022-03-20 09:08:45,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21800 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6989, Invalid=39021, Unknown=0, NotChecked=0, Total=46010 [2022-03-20 09:08:45,830 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 210 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:45,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 80 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:08:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-20 09:08:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2022-03-20 09:08:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 124 states have (on average 1.0483870967741935) internal successors, (130), 126 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:08:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2022-03-20 09:08:45,846 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 121 [2022-03-20 09:08:45,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:45,846 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2022-03-20 09:08:45,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2022-03-20 09:08:45,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 09:08:45,847 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:45,847 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:45,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-20 09:08:46,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:46,047 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash 793161216, now seen corresponding path program 44 times [2022-03-20 09:08:46,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:46,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377968816] [2022-03-20 09:08:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:46,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:46,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:08:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:46,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:08:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:46,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 09:08:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:46,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:46,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377968816] [2022-03-20 09:08:46,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377968816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:08:46,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423325497] [2022-03-20 09:08:46,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:08:46,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:46,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:46,788 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:46,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-20 09:08:47,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:08:47,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:08:47,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 09:08:47,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:48,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:08:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:50,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423325497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:08:50,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:08:50,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 55, 55] total 158 [2022-03-20 09:08:50,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836332077] [2022-03-20 09:08:50,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:08:50,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-03-20 09:08:50,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-03-20 09:08:50,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4121, Invalid=20685, Unknown=0, NotChecked=0, Total=24806 [2022-03-20 09:08:50,539 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:52,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:52,302 INFO L93 Difference]: Finished difference Result 151 states and 156 transitions. [2022-03-20 09:08:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 09:08:52,303 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2022-03-20 09:08:52,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:52,303 INFO L225 Difference]: With dead ends: 151 [2022-03-20 09:08:52,303 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 09:08:52,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21535 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6999, Invalid=37733, Unknown=0, NotChecked=0, Total=44732 [2022-03-20 09:08:52,307 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:52,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 92 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:08:52,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 09:08:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2022-03-20 09:08:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 125 states have internal predecessors, (128), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:08:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2022-03-20 09:08:52,323 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 123 [2022-03-20 09:08:52,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:52,323 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2022-03-20 09:08:52,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:52,324 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2022-03-20 09:08:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 09:08:52,324 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:52,324 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:52,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-20 09:08:52,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-03-20 09:08:52,543 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:52,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1926404235, now seen corresponding path program 44 times [2022-03-20 09:08:52,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:52,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120516367] [2022-03-20 09:08:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:52,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:52,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:08:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:52,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:08:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:52,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 09:08:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:53,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:53,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120516367] [2022-03-20 09:08:53,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120516367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:08:53,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735998748] [2022-03-20 09:08:53,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:08:53,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:53,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:53,476 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:53,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-20 09:08:53,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:08:53,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:08:53,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 09:08:53,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:55,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:08:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:57,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735998748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:08:57,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:08:57,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 55, 55] total 158 [2022-03-20 09:08:57,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367064936] [2022-03-20 09:08:57,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:08:57,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-03-20 09:08:57,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:57,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-03-20 09:08:57,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4121, Invalid=20685, Unknown=0, NotChecked=0, Total=24806 [2022-03-20 09:08:57,140 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:58,813 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2022-03-20 09:08:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 09:08:58,813 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2022-03-20 09:08:58,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:58,814 INFO L225 Difference]: With dead ends: 145 [2022-03-20 09:08:58,814 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 09:08:58,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21392 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6999, Invalid=37733, Unknown=0, NotChecked=0, Total=44732 [2022-03-20 09:08:58,817 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 254 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:58,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 70 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:08:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 09:08:58,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-03-20 09:08:58,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 124 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:08:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2022-03-20 09:08:58,833 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 123 [2022-03-20 09:08:58,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:58,833 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2022-03-20 09:08:58,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:08:58,834 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2022-03-20 09:08:58,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 09:08:58,834 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:58,834 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:58,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-20 09:08:59,034 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:59,035 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:59,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:59,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1900337563, now seen corresponding path program 45 times [2022-03-20 09:08:59,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:59,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378145487] [2022-03-20 09:08:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:59,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:59,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:08:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:59,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:08:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:59,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 09:08:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:08:59,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:59,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378145487] [2022-03-20 09:08:59,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378145487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:08:59,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622933808] [2022-03-20 09:08:59,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:08:59,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:59,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:59,844 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:59,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-20 09:09:00,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-03-20 09:09:00,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:09:00,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 09:09:00,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:01,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:03,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622933808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:03,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:09:03,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 165 [2022-03-20 09:09:03,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539067709] [2022-03-20 09:09:03,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:03,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-03-20 09:09:03,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:03,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-03-20 09:09:03,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4397, Invalid=22663, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 09:09:03,921 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:06,045 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2022-03-20 09:09:06,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 09:09:06,046 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 125 [2022-03-20 09:09:06,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:06,046 INFO L225 Difference]: With dead ends: 158 [2022-03-20 09:09:06,046 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 09:09:06,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23519 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7525, Invalid=41981, Unknown=0, NotChecked=0, Total=49506 [2022-03-20 09:09:06,050 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:06,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 127 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 09:09:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 09:09:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2022-03-20 09:09:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 125 states have (on average 1.04) internal successors, (130), 127 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:09:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2022-03-20 09:09:06,078 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 125 [2022-03-20 09:09:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:06,078 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2022-03-20 09:09:06,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:06,078 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2022-03-20 09:09:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 09:09:06,078 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:06,079 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:06,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-20 09:09:06,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:06,283 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:06,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:06,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1194324665, now seen corresponding path program 45 times [2022-03-20 09:09:06,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:06,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026217862] [2022-03-20 09:09:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:06,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:09:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:06,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:09:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:06,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 09:09:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:07,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:07,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026217862] [2022-03-20 09:09:07,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026217862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:09:07,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674874602] [2022-03-20 09:09:07,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:09:07,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:07,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:07,267 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:09:07,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-20 09:09:07,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-03-20 09:09:07,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:09:07,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 09:09:07,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:09,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:11,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674874602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:11,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:09:11,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 165 [2022-03-20 09:09:11,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668125480] [2022-03-20 09:09:11,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:11,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-03-20 09:09:11,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:11,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-03-20 09:09:11,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4397, Invalid=22663, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 09:09:11,182 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:13,123 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-03-20 09:09:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 09:09:13,123 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 125 [2022-03-20 09:09:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:13,124 INFO L225 Difference]: With dead ends: 153 [2022-03-20 09:09:13,124 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 09:09:13,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23544 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7525, Invalid=41981, Unknown=0, NotChecked=0, Total=49506 [2022-03-20 09:09:13,126 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 259 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:13,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 75 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:09:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 09:09:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-03-20 09:09:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 128 states have (on average 1.046875) internal successors, (134), 130 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:09:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 145 transitions. [2022-03-20 09:09:13,144 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 145 transitions. Word has length 125 [2022-03-20 09:09:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:13,144 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 145 transitions. [2022-03-20 09:09:13,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 145 transitions. [2022-03-20 09:09:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 09:09:13,145 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:13,145 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:13,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-20 09:09:13,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:13,359 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:13,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:13,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1250826337, now seen corresponding path program 46 times [2022-03-20 09:09:13,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:13,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077473542] [2022-03-20 09:09:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:13,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:13,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:09:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:13,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:09:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:13,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 09:09:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:14,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:14,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077473542] [2022-03-20 09:09:14,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077473542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:09:14,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190585574] [2022-03-20 09:09:14,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:09:14,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:14,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:14,164 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:09:14,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-20 09:09:14,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:09:14,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:09:14,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 09:09:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:15,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:18,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190585574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:18,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:09:18,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 57, 57] total 164 [2022-03-20 09:09:18,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806098965] [2022-03-20 09:09:18,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:18,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-03-20 09:09:18,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:18,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-03-20 09:09:18,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4441, Invalid=22291, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 09:09:18,372 INFO L87 Difference]: Start difference. First operand 140 states and 145 transitions. Second operand has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:20,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:20,419 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2022-03-20 09:09:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 09:09:20,419 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 127 [2022-03-20 09:09:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:20,420 INFO L225 Difference]: With dead ends: 155 [2022-03-20 09:09:20,420 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 09:09:20,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23268 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7537, Invalid=40643, Unknown=0, NotChecked=0, Total=48180 [2022-03-20 09:09:20,422 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 166 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:20,422 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 117 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:09:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 09:09:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2022-03-20 09:09:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 129 states have internal predecessors, (132), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:09:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2022-03-20 09:09:20,439 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 127 [2022-03-20 09:09:20,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:20,439 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2022-03-20 09:09:20,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:20,440 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2022-03-20 09:09:20,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 09:09:20,440 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:20,440 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:20,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-20 09:09:20,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:20,657 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:20,657 INFO L85 PathProgramCache]: Analyzing trace with hash 871355412, now seen corresponding path program 46 times [2022-03-20 09:09:20,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:20,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827439758] [2022-03-20 09:09:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:20,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:20,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:09:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:20,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:09:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:21,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-20 09:09:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:21,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:21,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827439758] [2022-03-20 09:09:21,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827439758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:09:21,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385764912] [2022-03-20 09:09:21,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:09:21,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:21,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:21,648 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:09:21,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-20 09:09:21,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:09:21,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:09:21,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 09:09:21,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:23,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:25,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385764912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:25,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:09:25,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 57, 57] total 164 [2022-03-20 09:09:25,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473603145] [2022-03-20 09:09:25,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:25,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-03-20 09:09:25,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:25,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-03-20 09:09:25,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4441, Invalid=22291, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 09:09:25,470 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:27,376 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-03-20 09:09:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 09:09:27,377 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 127 [2022-03-20 09:09:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:27,377 INFO L225 Difference]: With dead ends: 149 [2022-03-20 09:09:27,377 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 09:09:27,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23119 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7537, Invalid=40643, Unknown=0, NotChecked=0, Total=48180 [2022-03-20 09:09:27,380 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 173 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:27,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 110 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:09:27,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 09:09:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-03-20 09:09:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 128 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:09:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-03-20 09:09:27,397 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 127 [2022-03-20 09:09:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:27,397 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-03-20 09:09:27,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-03-20 09:09:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 09:09:27,398 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:27,398 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:27,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-20 09:09:27,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-20 09:09:27,598 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:27,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1897831034, now seen corresponding path program 47 times [2022-03-20 09:09:27,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:27,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715959668] [2022-03-20 09:09:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:27,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:27,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:09:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:27,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:09:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:28,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-20 09:09:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:28,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:28,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715959668] [2022-03-20 09:09:28,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715959668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:09:28,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469279498] [2022-03-20 09:09:28,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:09:28,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:28,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:28,429 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:09:28,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-20 09:09:28,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-03-20 09:09:28,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:09:28,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 09:09:28,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:30,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:32,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469279498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:32,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:09:32,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 171 [2022-03-20 09:09:32,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651614460] [2022-03-20 09:09:32,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:32,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-03-20 09:09:32,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:32,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-03-20 09:09:32,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4727, Invalid=24343, Unknown=0, NotChecked=0, Total=29070 [2022-03-20 09:09:32,659 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:34,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:34,826 INFO L93 Difference]: Finished difference Result 162 states and 169 transitions. [2022-03-20 09:09:34,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 09:09:34,826 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 129 [2022-03-20 09:09:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:34,827 INFO L225 Difference]: With dead ends: 162 [2022-03-20 09:09:34,827 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 09:09:34,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25329 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8081, Invalid=45049, Unknown=0, NotChecked=0, Total=53130 [2022-03-20 09:09:34,830 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:34,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 112 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:09:34,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 09:09:34,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2022-03-20 09:09:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 131 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:09:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2022-03-20 09:09:34,848 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 129 [2022-03-20 09:09:34,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:34,848 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2022-03-20 09:09:34,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:34,848 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2022-03-20 09:09:34,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 09:09:34,849 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:34,849 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:34,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-20 09:09:35,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-20 09:09:35,049 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:35,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:35,050 INFO L85 PathProgramCache]: Analyzing trace with hash 2034771928, now seen corresponding path program 47 times [2022-03-20 09:09:35,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:35,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227528642] [2022-03-20 09:09:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:35,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:35,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:09:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:35,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:09:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:35,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-20 09:09:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:36,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:36,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227528642] [2022-03-20 09:09:36,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227528642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:09:36,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274285992] [2022-03-20 09:09:36,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:09:36,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:36,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:36,100 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:09:36,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-20 09:09:36,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-03-20 09:09:36,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:09:36,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 09:09:36,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:37,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:40,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274285992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:40,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:09:40,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 171 [2022-03-20 09:09:40,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278567577] [2022-03-20 09:09:40,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:40,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-03-20 09:09:40,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:40,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-03-20 09:09:40,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4727, Invalid=24343, Unknown=0, NotChecked=0, Total=29070 [2022-03-20 09:09:40,169 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:42,438 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2022-03-20 09:09:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 09:09:42,439 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 129 [2022-03-20 09:09:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:42,439 INFO L225 Difference]: With dead ends: 157 [2022-03-20 09:09:42,439 INFO L226 Difference]: Without dead ends: 148 [2022-03-20 09:09:42,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25355 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8081, Invalid=45049, Unknown=0, NotChecked=0, Total=53130 [2022-03-20 09:09:42,442 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:42,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 155 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 09:09:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-20 09:09:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2022-03-20 09:09:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 132 states have (on average 1.0454545454545454) internal successors, (138), 134 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:09:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2022-03-20 09:09:42,474 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 129 [2022-03-20 09:09:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:42,474 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2022-03-20 09:09:42,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2022-03-20 09:09:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 09:09:42,475 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:42,475 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:42,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-20 09:09:42,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-20 09:09:42,692 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:42,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:42,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1034858242, now seen corresponding path program 48 times [2022-03-20 09:09:42,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:42,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277928779] [2022-03-20 09:09:42,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:42,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:42,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:09:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:42,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:09:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:43,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-20 09:09:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:43,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:43,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277928779] [2022-03-20 09:09:43,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277928779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:09:43,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184851221] [2022-03-20 09:09:43,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:09:43,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:43,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:43,522 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:09:43,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-20 09:09:43,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-20 09:09:43,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:09:43,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 09:09:43,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:45,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:47,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184851221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:47,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:09:47,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 59, 59] total 170 [2022-03-20 09:09:47,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553025431] [2022-03-20 09:09:47,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:47,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-03-20 09:09:47,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-03-20 09:09:47,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4773, Invalid=23957, Unknown=0, NotChecked=0, Total=28730 [2022-03-20 09:09:47,780 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:49,755 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2022-03-20 09:09:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 09:09:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 131 [2022-03-20 09:09:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:49,756 INFO L225 Difference]: With dead ends: 159 [2022-03-20 09:09:49,756 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 09:09:49,759 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25068 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8095, Invalid=43661, Unknown=0, NotChecked=0, Total=51756 [2022-03-20 09:09:49,760 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:49,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 97 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:09:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 09:09:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2022-03-20 09:09:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 133 states have internal predecessors, (136), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:09:49,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2022-03-20 09:09:49,782 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 131 [2022-03-20 09:09:49,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:49,782 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2022-03-20 09:09:49,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2022-03-20 09:09:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 09:09:49,785 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:49,785 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:49,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-20 09:09:50,001 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:50,001 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:50,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1738166157, now seen corresponding path program 48 times [2022-03-20 09:09:50,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:50,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123211747] [2022-03-20 09:09:50,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:50,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:50,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:09:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:50,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:09:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:50,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 09:09:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:51,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:51,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123211747] [2022-03-20 09:09:51,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123211747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:09:51,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949732263] [2022-03-20 09:09:51,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:09:51,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:51,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:51,068 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:09:51,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-20 09:09:51,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-20 09:09:51,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:09:51,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 09:09:51,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:52,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:55,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949732263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:55,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:09:55,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 59, 59] total 170 [2022-03-20 09:09:55,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143261363] [2022-03-20 09:09:55,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:55,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-03-20 09:09:55,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:55,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-03-20 09:09:55,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4773, Invalid=23957, Unknown=0, NotChecked=0, Total=28730 [2022-03-20 09:09:55,130 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:57,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:57,046 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2022-03-20 09:09:57,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 09:09:57,046 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 131 [2022-03-20 09:09:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:57,047 INFO L225 Difference]: With dead ends: 153 [2022-03-20 09:09:57,047 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 09:09:57,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24913 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=8095, Invalid=43661, Unknown=0, NotChecked=0, Total=51756 [2022-03-20 09:09:57,051 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 174 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:57,051 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 105 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:09:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 09:09:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-03-20 09:09:57,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 132 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:09:57,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2022-03-20 09:09:57,077 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 131 [2022-03-20 09:09:57,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:57,077 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2022-03-20 09:09:57,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:09:57,078 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2022-03-20 09:09:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 09:09:57,078 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:57,078 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:57,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-20 09:09:57,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-20 09:09:57,287 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:57,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1886463207, now seen corresponding path program 49 times [2022-03-20 09:09:57,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:57,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781054713] [2022-03-20 09:09:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:57,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:57,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:09:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:57,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:09:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:57,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 09:09:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:09:58,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:58,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781054713] [2022-03-20 09:09:58,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781054713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:09:58,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070208782] [2022-03-20 09:09:58,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:09:58,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:58,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:58,167 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:09:58,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-20 09:09:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:58,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 09:09:58,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:10:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:00,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:10:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:02,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070208782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:10:02,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:10:02,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 177 [2022-03-20 09:10:02,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044523147] [2022-03-20 09:10:02,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:10:02,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-03-20 09:10:02,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:10:02,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-03-20 09:10:02,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5069, Invalid=26083, Unknown=0, NotChecked=0, Total=31152 [2022-03-20 09:10:02,705 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:05,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:10:05,056 INFO L93 Difference]: Finished difference Result 166 states and 173 transitions. [2022-03-20 09:10:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 09:10:05,059 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-03-20 09:10:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:10:05,060 INFO L225 Difference]: With dead ends: 166 [2022-03-20 09:10:05,060 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 09:10:05,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27206 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8657, Invalid=48225, Unknown=0, NotChecked=0, Total=56882 [2022-03-20 09:10:05,064 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 213 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 09:10:05,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 137 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 09:10:05,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 09:10:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2022-03-20 09:10:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 133 states have (on average 1.037593984962406) internal successors, (138), 135 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:10:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2022-03-20 09:10:05,083 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 133 [2022-03-20 09:10:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:10:05,083 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2022-03-20 09:10:05,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2022-03-20 09:10:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 09:10:05,084 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:10:05,084 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:10:05,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-20 09:10:05,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-20 09:10:05,303 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:10:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:10:05,303 INFO L85 PathProgramCache]: Analyzing trace with hash 875220151, now seen corresponding path program 49 times [2022-03-20 09:10:05,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:10:05,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467920214] [2022-03-20 09:10:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:10:05,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:10:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:05,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:10:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:05,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:10:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:05,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 09:10:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:06,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:10:06,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467920214] [2022-03-20 09:10:06,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467920214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:10:06,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577794049] [2022-03-20 09:10:06,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:10:06,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:06,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:10:06,395 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:10:06,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-20 09:10:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:06,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 09:10:06,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:10:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:08,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:10:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:10,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577794049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:10:10,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:10:10,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 177 [2022-03-20 09:10:10,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880003581] [2022-03-20 09:10:10,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:10:10,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-03-20 09:10:10,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:10:10,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-03-20 09:10:10,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5069, Invalid=26083, Unknown=0, NotChecked=0, Total=31152 [2022-03-20 09:10:10,782 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:10:12,946 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2022-03-20 09:10:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 09:10:12,947 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-03-20 09:10:12,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:10:12,947 INFO L225 Difference]: With dead ends: 161 [2022-03-20 09:10:12,947 INFO L226 Difference]: Without dead ends: 152 [2022-03-20 09:10:12,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27233 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8657, Invalid=48225, Unknown=0, NotChecked=0, Total=56882 [2022-03-20 09:10:12,951 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 198 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:10:12,951 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 90 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:10:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-20 09:10:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2022-03-20 09:10:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 136 states have (on average 1.0441176470588236) internal successors, (142), 138 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:10:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2022-03-20 09:10:12,971 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 133 [2022-03-20 09:10:12,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:10:12,972 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2022-03-20 09:10:12,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2022-03-20 09:10:12,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 09:10:12,972 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:10:12,972 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:10:12,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-20 09:10:13,180 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:13,180 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:10:13,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:10:13,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1327381021, now seen corresponding path program 50 times [2022-03-20 09:10:13,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:10:13,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087045966] [2022-03-20 09:10:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:10:13,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:10:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:13,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:10:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:13,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:10:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:13,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 09:10:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:14,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:10:14,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087045966] [2022-03-20 09:10:14,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087045966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:10:14,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944290023] [2022-03-20 09:10:14,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:10:14,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:14,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:10:14,078 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:10:14,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-20 09:10:14,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:10:14,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:10:14,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 09:10:14,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:10:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:15,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:10:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:18,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944290023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:10:18,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:10:18,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 61, 61] total 176 [2022-03-20 09:10:18,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635693067] [2022-03-20 09:10:18,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:10:18,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-03-20 09:10:18,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:10:18,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-03-20 09:10:18,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5117, Invalid=25683, Unknown=0, NotChecked=0, Total=30800 [2022-03-20 09:10:18,478 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:20,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:10:20,688 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2022-03-20 09:10:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 09:10:20,689 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 135 [2022-03-20 09:10:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:10:20,689 INFO L225 Difference]: With dead ends: 163 [2022-03-20 09:10:20,689 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 09:10:20,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26935 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8673, Invalid=46787, Unknown=0, NotChecked=0, Total=55460 [2022-03-20 09:10:20,692 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 195 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 09:10:20,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 127 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 09:10:20,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 09:10:20,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2022-03-20 09:10:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 135 states have (on average 1.037037037037037) internal successors, (140), 137 states have internal predecessors, (140), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:10:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2022-03-20 09:10:20,710 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 135 [2022-03-20 09:10:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:10:20,710 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2022-03-20 09:10:20,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2022-03-20 09:10:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 09:10:20,711 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:10:20,711 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:10:20,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-20 09:10:20,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:20,912 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:10:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:10:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash -252162926, now seen corresponding path program 50 times [2022-03-20 09:10:20,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:10:20,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462137810] [2022-03-20 09:10:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:10:20,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:10:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:20,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:10:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:20,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:10:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:21,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 09:10:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:22,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:10:22,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462137810] [2022-03-20 09:10:22,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462137810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:10:22,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900425761] [2022-03-20 09:10:22,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:10:22,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:22,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:10:22,031 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:10:22,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-20 09:10:22,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:10:22,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:10:22,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 09:10:22,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:10:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:23,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:10:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:26,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900425761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:10:26,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:10:26,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 61, 61] total 176 [2022-03-20 09:10:26,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840863513] [2022-03-20 09:10:26,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:10:26,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-03-20 09:10:26,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:10:26,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-03-20 09:10:26,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5117, Invalid=25683, Unknown=0, NotChecked=0, Total=30800 [2022-03-20 09:10:26,303 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:10:28,458 INFO L93 Difference]: Finished difference Result 157 states and 160 transitions. [2022-03-20 09:10:28,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 09:10:28,459 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 135 [2022-03-20 09:10:28,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:10:28,459 INFO L225 Difference]: With dead ends: 157 [2022-03-20 09:10:28,459 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 09:10:28,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26774 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8673, Invalid=46787, Unknown=0, NotChecked=0, Total=55460 [2022-03-20 09:10:28,463 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 200 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:10:28,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 125 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:10:28,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 09:10:28,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-03-20 09:10:28,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 136 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:10:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2022-03-20 09:10:28,482 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 135 [2022-03-20 09:10:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:10:28,482 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2022-03-20 09:10:28,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:28,482 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2022-03-20 09:10:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 09:10:28,482 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:10:28,482 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:10:28,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-20 09:10:28,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-20 09:10:28,683 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:10:28,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:10:28,683 INFO L85 PathProgramCache]: Analyzing trace with hash 233499512, now seen corresponding path program 51 times [2022-03-20 09:10:28,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:10:28,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392429699] [2022-03-20 09:10:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:10:28,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:10:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:28,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:10:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:28,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:10:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:29,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 09:10:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:29,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:10:29,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392429699] [2022-03-20 09:10:29,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392429699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:10:29,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273555545] [2022-03-20 09:10:29,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:10:29,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:29,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:10:29,624 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:10:29,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-20 09:10:29,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-20 09:10:29,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:10:29,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 09:10:29,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:10:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:31,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:10:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:34,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273555545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:10:34,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:10:34,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 183 [2022-03-20 09:10:34,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850051816] [2022-03-20 09:10:34,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:10:34,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-03-20 09:10:34,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:10:34,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-03-20 09:10:34,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5423, Invalid=27883, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 09:10:34,389 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:10:36,878 INFO L93 Difference]: Finished difference Result 170 states and 177 transitions. [2022-03-20 09:10:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 09:10:36,878 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 137 [2022-03-20 09:10:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:10:36,879 INFO L225 Difference]: With dead ends: 170 [2022-03-20 09:10:36,879 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 09:10:36,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29150 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9253, Invalid=51509, Unknown=0, NotChecked=0, Total=60762 [2022-03-20 09:10:36,883 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 234 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 09:10:36,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 142 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1901 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 09:10:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 09:10:36,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 149. [2022-03-20 09:10:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 139 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:10:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2022-03-20 09:10:36,923 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 137 [2022-03-20 09:10:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:10:36,924 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2022-03-20 09:10:36,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2022-03-20 09:10:36,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 09:10:36,924 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:10:36,924 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:10:36,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-20 09:10:37,137 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:37,137 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:10:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:10:37,138 INFO L85 PathProgramCache]: Analyzing trace with hash -68079274, now seen corresponding path program 51 times [2022-03-20 09:10:37,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:10:37,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937220470] [2022-03-20 09:10:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:10:37,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:10:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:37,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:10:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:37,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:10:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:37,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 09:10:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:38,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:10:38,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937220470] [2022-03-20 09:10:38,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937220470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:10:38,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740233220] [2022-03-20 09:10:38,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:10:38,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:38,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:10:38,314 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:10:38,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-20 09:10:38,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-20 09:10:38,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:10:38,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 09:10:38,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:10:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:40,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:10:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:43,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740233220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:10:43,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:10:43,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 183 [2022-03-20 09:10:43,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406849341] [2022-03-20 09:10:43,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:10:43,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-03-20 09:10:43,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:10:43,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-03-20 09:10:43,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5423, Invalid=27883, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 09:10:43,009 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:45,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:10:45,370 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2022-03-20 09:10:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 09:10:45,370 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 137 [2022-03-20 09:10:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:10:45,370 INFO L225 Difference]: With dead ends: 165 [2022-03-20 09:10:45,370 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 09:10:45,374 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29178 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9253, Invalid=51509, Unknown=0, NotChecked=0, Total=60762 [2022-03-20 09:10:45,374 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 262 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:10:45,375 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 110 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:10:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 09:10:45,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2022-03-20 09:10:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 140 states have (on average 1.042857142857143) internal successors, (146), 142 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:10:45,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 157 transitions. [2022-03-20 09:10:45,411 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 157 transitions. Word has length 137 [2022-03-20 09:10:45,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:10:45,411 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 157 transitions. [2022-03-20 09:10:45,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:45,412 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 157 transitions. [2022-03-20 09:10:45,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-20 09:10:45,412 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:10:45,412 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:10:45,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-20 09:10:45,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:45,612 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:10:45,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:10:45,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1054733052, now seen corresponding path program 52 times [2022-03-20 09:10:45,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:10:45,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791968516] [2022-03-20 09:10:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:10:45,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:10:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:45,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:10:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:45,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:10:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:46,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 09:10:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:46,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:10:46,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791968516] [2022-03-20 09:10:46,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791968516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:10:46,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174951891] [2022-03-20 09:10:46,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:10:46,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:46,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:10:46,538 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:10:46,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-20 09:10:46,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:10:46,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:10:46,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 09:10:46,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:10:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:48,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:10:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:51,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174951891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:10:51,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:10:51,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 63, 63] total 182 [2022-03-20 09:10:51,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818374337] [2022-03-20 09:10:51,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:10:51,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-03-20 09:10:51,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:10:51,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-03-20 09:10:51,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5473, Invalid=27469, Unknown=0, NotChecked=0, Total=32942 [2022-03-20 09:10:51,220 INFO L87 Difference]: Start difference. First operand 152 states and 157 transitions. Second operand has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:53,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:10:53,393 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2022-03-20 09:10:53,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 09:10:53,394 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 139 [2022-03-20 09:10:53,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:10:53,394 INFO L225 Difference]: With dead ends: 167 [2022-03-20 09:10:53,394 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 09:10:53,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 161 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28869 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9271, Invalid=50021, Unknown=0, NotChecked=0, Total=59292 [2022-03-20 09:10:53,398 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 179 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:10:53,398 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 127 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:10:53,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 09:10:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-03-20 09:10:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 141 states have internal predecessors, (144), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:10:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2022-03-20 09:10:53,419 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 139 [2022-03-20 09:10:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:10:53,419 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2022-03-20 09:10:53,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:10:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2022-03-20 09:10:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-20 09:10:53,419 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:10:53,419 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:10:53,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-20 09:10:53,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-03-20 09:10:53,620 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:10:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:10:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash -774047631, now seen corresponding path program 52 times [2022-03-20 09:10:53,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:10:53,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222219091] [2022-03-20 09:10:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:10:53,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:10:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:53,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:10:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:53,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:10:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:54,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 09:10:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:10:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:54,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:10:54,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222219091] [2022-03-20 09:10:54,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222219091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:10:54,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645397887] [2022-03-20 09:10:54,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:10:54,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:54,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:10:54,862 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:10:54,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-20 09:10:55,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:10:55,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:10:55,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 09:10:55,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:10:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:56,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:10:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:10:59,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645397887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:10:59,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:10:59,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 63, 63] total 182 [2022-03-20 09:10:59,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46415099] [2022-03-20 09:10:59,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:10:59,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-03-20 09:10:59,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:10:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-03-20 09:10:59,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5473, Invalid=27469, Unknown=0, NotChecked=0, Total=32942 [2022-03-20 09:10:59,275 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:01,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:11:01,465 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2022-03-20 09:11:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 09:11:01,465 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 139 [2022-03-20 09:11:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:11:01,466 INFO L225 Difference]: With dead ends: 161 [2022-03-20 09:11:01,466 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 09:11:01,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 161 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28702 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9271, Invalid=50021, Unknown=0, NotChecked=0, Total=59292 [2022-03-20 09:11:01,469 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 217 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:11:01,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 135 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:11:01,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 09:11:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-03-20 09:11:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 140 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:11:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-03-20 09:11:01,489 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 139 [2022-03-20 09:11:01,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:11:01,490 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-03-20 09:11:01,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:01,490 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-03-20 09:11:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 09:11:01,490 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:11:01,490 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:11:01,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-20 09:11:01,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:11:01,691 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:11:01,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:11:01,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1213471639, now seen corresponding path program 53 times [2022-03-20 09:11:01,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:11:01,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142661993] [2022-03-20 09:11:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:11:01,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:11:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:01,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:11:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:01,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:11:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:02,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 09:11:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:02,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:11:02,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142661993] [2022-03-20 09:11:02,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142661993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:11:02,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440122384] [2022-03-20 09:11:02,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:11:02,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:11:02,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:11:02,661 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:11:02,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-20 09:11:03,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-03-20 09:11:03,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:11:03,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 09:11:03,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:11:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:04,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:11:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:07,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440122384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:11:07,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:11:07,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 189 [2022-03-20 09:11:07,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074084477] [2022-03-20 09:11:07,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:11:07,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-03-20 09:11:07,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:11:07,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-03-20 09:11:07,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5789, Invalid=29743, Unknown=0, NotChecked=0, Total=35532 [2022-03-20 09:11:07,609 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:11:10,344 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2022-03-20 09:11:10,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 09:11:10,345 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 141 [2022-03-20 09:11:10,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:11:10,345 INFO L225 Difference]: With dead ends: 174 [2022-03-20 09:11:10,345 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 09:11:10,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31161 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9869, Invalid=54901, Unknown=0, NotChecked=0, Total=64770 [2022-03-20 09:11:10,348 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 233 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 09:11:10,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 122 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 09:11:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 09:11:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 153. [2022-03-20 09:11:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.0354609929078014) internal successors, (146), 143 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:11:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2022-03-20 09:11:10,369 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 141 [2022-03-20 09:11:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:11:10,369 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2022-03-20 09:11:10,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:10,369 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2022-03-20 09:11:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 09:11:10,369 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:11:10,369 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:11:10,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-20 09:11:10,570 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-20 09:11:10,570 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:11:10,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:11:10,570 INFO L85 PathProgramCache]: Analyzing trace with hash -830429771, now seen corresponding path program 53 times [2022-03-20 09:11:10,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:11:10,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127817133] [2022-03-20 09:11:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:11:10,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:11:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:10,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:11:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:10,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:11:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:11,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 09:11:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:11,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:11:11,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127817133] [2022-03-20 09:11:11,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127817133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:11:11,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655879088] [2022-03-20 09:11:11,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:11:11,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:11:11,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:11:11,777 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:11:11,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-20 09:11:12,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-03-20 09:11:12,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:11:12,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 09:11:12,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:11:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:13,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:11:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:16,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655879088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:11:16,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:11:16,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 189 [2022-03-20 09:11:16,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477708335] [2022-03-20 09:11:16,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:11:16,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-03-20 09:11:16,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:11:16,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-03-20 09:11:16,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5789, Invalid=29743, Unknown=0, NotChecked=0, Total=35532 [2022-03-20 09:11:16,462 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:11:18,854 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2022-03-20 09:11:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 09:11:18,854 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 141 [2022-03-20 09:11:18,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:11:18,855 INFO L225 Difference]: With dead ends: 169 [2022-03-20 09:11:18,855 INFO L226 Difference]: Without dead ends: 160 [2022-03-20 09:11:18,858 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31190 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9869, Invalid=54901, Unknown=0, NotChecked=0, Total=64770 [2022-03-20 09:11:18,858 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 221 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:11:18,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 105 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:11:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-20 09:11:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2022-03-20 09:11:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 144 states have (on average 1.0416666666666667) internal successors, (150), 146 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:11:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2022-03-20 09:11:18,880 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 141 [2022-03-20 09:11:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:11:18,880 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2022-03-20 09:11:18,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2022-03-20 09:11:18,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 09:11:18,881 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:11:18,881 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:11:18,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-20 09:11:19,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:11:19,081 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:11:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:11:19,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1419654245, now seen corresponding path program 54 times [2022-03-20 09:11:19,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:11:19,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918796859] [2022-03-20 09:11:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:11:19,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:11:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:19,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:11:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:19,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:11:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:19,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 09:11:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:20,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:11:20,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918796859] [2022-03-20 09:11:20,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918796859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:11:20,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486348695] [2022-03-20 09:11:20,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:11:20,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:11:20,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:11:20,064 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:11:20,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-20 09:11:20,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-03-20 09:11:20,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:11:20,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 09:11:20,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:11:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:22,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:11:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:25,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486348695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:11:25,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:11:25,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 65, 65] total 188 [2022-03-20 09:11:25,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241302890] [2022-03-20 09:11:25,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:11:25,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-03-20 09:11:25,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:11:25,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-03-20 09:11:25,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5841, Invalid=29315, Unknown=0, NotChecked=0, Total=35156 [2022-03-20 09:11:25,288 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:11:27,426 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2022-03-20 09:11:27,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 09:11:27,427 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2022-03-20 09:11:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:11:27,427 INFO L225 Difference]: With dead ends: 171 [2022-03-20 09:11:27,427 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 09:11:27,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30870 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9889, Invalid=53363, Unknown=0, NotChecked=0, Total=63252 [2022-03-20 09:11:27,430 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:11:27,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 92 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:11:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 09:11:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2022-03-20 09:11:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 143 states have (on average 1.034965034965035) internal successors, (148), 145 states have internal predecessors, (148), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:11:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2022-03-20 09:11:27,453 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 143 [2022-03-20 09:11:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:11:27,453 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2022-03-20 09:11:27,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2022-03-20 09:11:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 09:11:27,453 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:11:27,453 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:11:27,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-20 09:11:27,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-20 09:11:27,674 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:11:27,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:11:27,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2048197648, now seen corresponding path program 54 times [2022-03-20 09:11:27,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:11:27,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257430928] [2022-03-20 09:11:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:11:27,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:11:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:27,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:11:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:27,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:11:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:28,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 09:11:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:28,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:11:28,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257430928] [2022-03-20 09:11:28,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257430928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:11:28,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700018000] [2022-03-20 09:11:28,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:11:28,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:11:28,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:11:28,912 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:11:28,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-20 09:11:29,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-03-20 09:11:29,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:11:29,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 09:11:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:11:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:30,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:11:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:33,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700018000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:11:33,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:11:33,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 65, 65] total 188 [2022-03-20 09:11:33,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889510247] [2022-03-20 09:11:33,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:11:33,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-03-20 09:11:33,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:11:33,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-03-20 09:11:33,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5841, Invalid=29315, Unknown=0, NotChecked=0, Total=35156 [2022-03-20 09:11:33,398 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:35,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:11:35,679 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2022-03-20 09:11:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 09:11:35,680 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2022-03-20 09:11:35,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:11:35,680 INFO L225 Difference]: With dead ends: 165 [2022-03-20 09:11:35,680 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 09:11:35,682 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30697 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9889, Invalid=53363, Unknown=0, NotChecked=0, Total=63252 [2022-03-20 09:11:35,683 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:11:35,683 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 120 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:11:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 09:11:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-03-20 09:11:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 142 states have (on average 1.028169014084507) internal successors, (146), 144 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:11:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2022-03-20 09:11:35,704 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 143 [2022-03-20 09:11:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:11:35,704 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2022-03-20 09:11:35,704 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2022-03-20 09:11:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 09:11:35,704 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:11:35,705 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:11:35,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-20 09:11:35,905 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-20 09:11:35,905 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:11:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:11:35,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1028146314, now seen corresponding path program 55 times [2022-03-20 09:11:35,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:11:35,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750857883] [2022-03-20 09:11:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:11:35,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:11:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:35,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:11:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:35,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:11:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:36,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 09:11:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:36,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:11:36,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750857883] [2022-03-20 09:11:36,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750857883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:11:36,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774962695] [2022-03-20 09:11:36,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:11:36,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:11:36,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:11:36,917 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:11:36,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-20 09:11:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:37,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 09:11:37,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:11:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:39,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:11:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:42,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774962695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:11:42,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:11:42,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 195 [2022-03-20 09:11:42,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086816023] [2022-03-20 09:11:42,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:11:42,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-03-20 09:11:42,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:11:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-03-20 09:11:42,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6167, Invalid=31663, Unknown=0, NotChecked=0, Total=37830 [2022-03-20 09:11:42,200 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:11:44,691 INFO L93 Difference]: Finished difference Result 178 states and 185 transitions. [2022-03-20 09:11:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 09:11:44,691 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2022-03-20 09:11:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:11:44,692 INFO L225 Difference]: With dead ends: 178 [2022-03-20 09:11:44,692 INFO L226 Difference]: Without dead ends: 167 [2022-03-20 09:11:44,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33239 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=10505, Invalid=58401, Unknown=0, NotChecked=0, Total=68906 [2022-03-20 09:11:44,696 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 280 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:11:44,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 107 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:11:44,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-20 09:11:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 157. [2022-03-20 09:11:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 147 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:11:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2022-03-20 09:11:44,717 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 145 [2022-03-20 09:11:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:11:44,718 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2022-03-20 09:11:44,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2022-03-20 09:11:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 09:11:44,718 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:11:44,718 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:11:44,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-20 09:11:44,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-20 09:11:44,919 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:11:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:11:44,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1888123348, now seen corresponding path program 55 times [2022-03-20 09:11:44,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:11:44,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966903785] [2022-03-20 09:11:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:11:44,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:11:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:44,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:11:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:44,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:11:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:45,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 09:11:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:46,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:11:46,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966903785] [2022-03-20 09:11:46,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966903785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:11:46,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434419132] [2022-03-20 09:11:46,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:11:46,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:11:46,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:11:46,192 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:11:46,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-20 09:11:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:46,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 09:11:46,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:11:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:48,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:11:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:51,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434419132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:11:51,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:11:51,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 195 [2022-03-20 09:11:51,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273588096] [2022-03-20 09:11:51,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:11:51,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-03-20 09:11:51,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:11:51,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-03-20 09:11:51,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6167, Invalid=31663, Unknown=0, NotChecked=0, Total=37830 [2022-03-20 09:11:51,113 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:11:53,557 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2022-03-20 09:11:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 09:11:53,558 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2022-03-20 09:11:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:11:53,558 INFO L225 Difference]: With dead ends: 173 [2022-03-20 09:11:53,558 INFO L226 Difference]: Without dead ends: 164 [2022-03-20 09:11:53,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33269 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10505, Invalid=58401, Unknown=0, NotChecked=0, Total=68906 [2022-03-20 09:11:53,562 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 257 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:11:53,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 95 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:11:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-20 09:11:53,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-03-20 09:11:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 150 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:11:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 165 transitions. [2022-03-20 09:11:53,586 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 165 transitions. Word has length 145 [2022-03-20 09:11:53,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:11:53,587 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 165 transitions. [2022-03-20 09:11:53,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:11:53,587 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 165 transitions. [2022-03-20 09:11:53,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 09:11:53,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:11:53,587 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:11:53,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-20 09:11:53,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-20 09:11:53,788 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:11:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:11:53,788 INFO L85 PathProgramCache]: Analyzing trace with hash -230222854, now seen corresponding path program 56 times [2022-03-20 09:11:53,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:11:53,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016953934] [2022-03-20 09:11:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:11:53,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:11:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:53,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:11:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:53,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:11:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:54,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 09:11:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:11:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:54,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:11:54,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016953934] [2022-03-20 09:11:54,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016953934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:11:54,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918407671] [2022-03-20 09:11:54,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:11:54,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:11:54,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:11:54,864 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:11:54,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-20 09:11:55,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:11:55,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:11:55,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 09:11:55,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:11:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:57,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:11:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:11:59,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918407671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:11:59,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:11:59,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 67, 67] total 194 [2022-03-20 09:11:59,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144432746] [2022-03-20 09:11:59,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:11:59,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-03-20 09:11:59,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:11:59,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-03-20 09:11:59,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6221, Invalid=31221, Unknown=0, NotChecked=0, Total=37442 [2022-03-20 09:11:59,944 INFO L87 Difference]: Start difference. First operand 160 states and 165 transitions. Second operand has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:12:02,332 INFO L93 Difference]: Finished difference Result 175 states and 180 transitions. [2022-03-20 09:12:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 09:12:02,332 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 147 [2022-03-20 09:12:02,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:12:02,333 INFO L225 Difference]: With dead ends: 175 [2022-03-20 09:12:02,333 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 09:12:02,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32938 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=10527, Invalid=56813, Unknown=0, NotChecked=0, Total=67340 [2022-03-20 09:12:02,345 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 178 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:12:02,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 122 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:12:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 09:12:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2022-03-20 09:12:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 147 states have (on average 1.034013605442177) internal successors, (152), 149 states have internal predecessors, (152), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:12:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2022-03-20 09:12:02,368 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 147 [2022-03-20 09:12:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:12:02,368 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2022-03-20 09:12:02,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2022-03-20 09:12:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 09:12:02,369 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:12:02,369 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:12:02,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-20 09:12:02,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:12:02,569 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:12:02,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:12:02,570 INFO L85 PathProgramCache]: Analyzing trace with hash -529678481, now seen corresponding path program 56 times [2022-03-20 09:12:02,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:12:02,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35458486] [2022-03-20 09:12:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:12:02,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:12:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:02,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:12:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:02,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:12:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:03,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-20 09:12:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:03,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:12:03,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35458486] [2022-03-20 09:12:03,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35458486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:12:03,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143239875] [2022-03-20 09:12:03,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:12:03,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:12:03,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:12:03,845 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:12:03,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-20 09:12:04,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:12:04,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:12:04,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 09:12:04,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:12:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:06,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:12:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:08,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143239875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:12:08,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:12:08,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 67, 67] total 194 [2022-03-20 09:12:08,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098703985] [2022-03-20 09:12:08,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:12:08,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-03-20 09:12:08,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:12:08,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-03-20 09:12:08,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6221, Invalid=31221, Unknown=0, NotChecked=0, Total=37442 [2022-03-20 09:12:08,810 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:12:11,155 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2022-03-20 09:12:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 09:12:11,156 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 147 [2022-03-20 09:12:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:12:11,156 INFO L225 Difference]: With dead ends: 169 [2022-03-20 09:12:11,156 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 09:12:11,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32759 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=10527, Invalid=56813, Unknown=0, NotChecked=0, Total=67340 [2022-03-20 09:12:11,160 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 266 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:12:11,160 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 95 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:12:11,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 09:12:11,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-03-20 09:12:11,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 148 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:12:11,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2022-03-20 09:12:11,183 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 147 [2022-03-20 09:12:11,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:12:11,183 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2022-03-20 09:12:11,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:11,183 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2022-03-20 09:12:11,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 09:12:11,184 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:12:11,184 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:12:11,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-20 09:12:11,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:12:11,384 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:12:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:12:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash -170976491, now seen corresponding path program 57 times [2022-03-20 09:12:11,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:12:11,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111771587] [2022-03-20 09:12:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:12:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:12:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:11,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:12:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:11,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:12:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:11,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-20 09:12:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:12,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:12:12,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111771587] [2022-03-20 09:12:12,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111771587] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:12:12,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647633661] [2022-03-20 09:12:12,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:12:12,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:12:12,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:12:12,454 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:12:12,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-20 09:12:12,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-03-20 09:12:12,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:12:12,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 09:12:12,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:12:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:14,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:12:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:17,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647633661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:12:17,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:12:17,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 201 [2022-03-20 09:12:17,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856393359] [2022-03-20 09:12:17,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:12:17,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-03-20 09:12:17,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:12:17,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-03-20 09:12:17,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=33643, Unknown=0, NotChecked=0, Total=40200 [2022-03-20 09:12:17,961 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:12:20,543 INFO L93 Difference]: Finished difference Result 182 states and 189 transitions. [2022-03-20 09:12:20,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 09:12:20,543 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 149 [2022-03-20 09:12:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:12:20,544 INFO L225 Difference]: With dead ends: 182 [2022-03-20 09:12:20,544 INFO L226 Difference]: Without dead ends: 171 [2022-03-20 09:12:20,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35384 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=11161, Invalid=62009, Unknown=0, NotChecked=0, Total=73170 [2022-03-20 09:12:20,547 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 252 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:12:20,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 87 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:12:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-20 09:12:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2022-03-20 09:12:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 151 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:12:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-03-20 09:12:20,570 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 149 [2022-03-20 09:12:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:12:20,570 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-03-20 09:12:20,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-03-20 09:12:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 09:12:20,570 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:12:20,571 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:12:20,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-20 09:12:20,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:12:20,771 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:12:20,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:12:20,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2055994803, now seen corresponding path program 57 times [2022-03-20 09:12:20,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:12:20,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098976508] [2022-03-20 09:12:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:12:20,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:12:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:20,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:12:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:20,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:12:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:21,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-20 09:12:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:22,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:12:22,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098976508] [2022-03-20 09:12:22,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098976508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:12:22,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208705573] [2022-03-20 09:12:22,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:12:22,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:12:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:12:22,120 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:12:22,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-20 09:12:22,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-03-20 09:12:22,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:12:22,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 09:12:22,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:12:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:24,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:12:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:27,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208705573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:12:27,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:12:27,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 201 [2022-03-20 09:12:27,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000040043] [2022-03-20 09:12:27,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:12:27,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-03-20 09:12:27,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:12:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-03-20 09:12:27,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=33643, Unknown=0, NotChecked=0, Total=40200 [2022-03-20 09:12:27,366 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:29,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:12:29,912 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2022-03-20 09:12:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 09:12:29,912 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 149 [2022-03-20 09:12:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:12:29,913 INFO L225 Difference]: With dead ends: 177 [2022-03-20 09:12:29,913 INFO L226 Difference]: Without dead ends: 168 [2022-03-20 09:12:29,917 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35415 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=11161, Invalid=62009, Unknown=0, NotChecked=0, Total=73170 [2022-03-20 09:12:29,917 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 265 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:12:29,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 80 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:12:29,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-20 09:12:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2022-03-20 09:12:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.0394736842105263) internal successors, (158), 154 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:12:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 169 transitions. [2022-03-20 09:12:29,941 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 169 transitions. Word has length 149 [2022-03-20 09:12:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:12:29,941 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 169 transitions. [2022-03-20 09:12:29,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 169 transitions. [2022-03-20 09:12:29,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 09:12:29,941 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:12:29,941 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:12:29,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-20 09:12:30,142 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:12:30,142 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:12:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:12:30,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2114511847, now seen corresponding path program 58 times [2022-03-20 09:12:30,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:12:30,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774083836] [2022-03-20 09:12:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:12:30,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:12:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:30,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:12:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:30,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:12:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:30,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-20 09:12:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:31,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:12:31,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774083836] [2022-03-20 09:12:31,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774083836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:12:31,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145985393] [2022-03-20 09:12:31,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:12:31,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:12:31,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:12:31,229 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:12:31,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-20 09:12:31,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:12:31,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:12:31,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 09:12:31,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:12:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:33,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:12:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:36,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145985393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:12:36,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:12:36,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 69, 69] total 200 [2022-03-20 09:12:36,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508614744] [2022-03-20 09:12:36,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:12:36,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-03-20 09:12:36,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:12:36,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-03-20 09:12:36,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6613, Invalid=33187, Unknown=0, NotChecked=0, Total=39800 [2022-03-20 09:12:36,527 INFO L87 Difference]: Start difference. First operand 164 states and 169 transitions. Second operand has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:12:38,897 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2022-03-20 09:12:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 09:12:38,897 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 151 [2022-03-20 09:12:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:12:38,898 INFO L225 Difference]: With dead ends: 179 [2022-03-20 09:12:38,898 INFO L226 Difference]: Without dead ends: 167 [2022-03-20 09:12:38,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35073 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=11185, Invalid=60371, Unknown=0, NotChecked=0, Total=71556 [2022-03-20 09:12:38,903 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 198 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:12:38,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 82 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:12:38,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-20 09:12:38,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2022-03-20 09:12:38,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 151 states have (on average 1.033112582781457) internal successors, (156), 153 states have internal predecessors, (156), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:12:38,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 167 transitions. [2022-03-20 09:12:38,937 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 167 transitions. Word has length 151 [2022-03-20 09:12:38,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:12:38,937 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 167 transitions. [2022-03-20 09:12:38,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:38,937 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 167 transitions. [2022-03-20 09:12:38,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 09:12:38,938 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:12:38,938 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:12:38,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-20 09:12:39,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:12:39,139 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:12:39,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:12:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2139063666, now seen corresponding path program 58 times [2022-03-20 09:12:39,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:12:39,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974964106] [2022-03-20 09:12:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:12:39,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:12:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:39,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:12:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:39,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:12:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:39,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 09:12:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:40,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:12:40,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974964106] [2022-03-20 09:12:40,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974964106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:12:40,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033919544] [2022-03-20 09:12:40,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:12:40,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:12:40,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:12:40,480 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:12:40,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-20 09:12:40,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:12:40,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:12:40,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 09:12:40,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:12:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:42,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:12:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:45,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033919544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:12:45,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:12:45,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 69, 69] total 200 [2022-03-20 09:12:45,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236657123] [2022-03-20 09:12:45,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:12:45,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-03-20 09:12:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:12:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-03-20 09:12:45,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6613, Invalid=33187, Unknown=0, NotChecked=0, Total=39800 [2022-03-20 09:12:45,563 INFO L87 Difference]: Start difference. First operand 163 states and 167 transitions. Second operand has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:12:47,979 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2022-03-20 09:12:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 09:12:47,981 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 151 [2022-03-20 09:12:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:12:47,981 INFO L225 Difference]: With dead ends: 173 [2022-03-20 09:12:47,982 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 09:12:47,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34888 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=11185, Invalid=60371, Unknown=0, NotChecked=0, Total=71556 [2022-03-20 09:12:47,985 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 232 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:12:47,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 110 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:12:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 09:12:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-03-20 09:12:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 152 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:12:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2022-03-20 09:12:48,008 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 151 [2022-03-20 09:12:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:12:48,008 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2022-03-20 09:12:48,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2022-03-20 09:12:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 09:12:48,009 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:12:48,009 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:12:48,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-20 09:12:48,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-20 09:12:48,209 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:12:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:12:48,210 INFO L85 PathProgramCache]: Analyzing trace with hash -601912716, now seen corresponding path program 59 times [2022-03-20 09:12:48,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:12:48,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620096694] [2022-03-20 09:12:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:12:48,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:12:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:48,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:12:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:48,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:12:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:48,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 09:12:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:49,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:12:49,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620096694] [2022-03-20 09:12:49,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620096694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:12:49,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266241353] [2022-03-20 09:12:49,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:12:49,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:12:49,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:12:49,304 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:12:49,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-20 09:12:49,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-03-20 09:12:49,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:12:49,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 09:12:49,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:12:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:51,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:12:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:55,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266241353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:12:55,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:12:55,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 207 [2022-03-20 09:12:55,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787725097] [2022-03-20 09:12:55,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:12:55,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2022-03-20 09:12:55,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:12:55,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2022-03-20 09:12:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6959, Invalid=35683, Unknown=0, NotChecked=0, Total=42642 [2022-03-20 09:12:55,011 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:57,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:12:57,751 INFO L93 Difference]: Finished difference Result 186 states and 193 transitions. [2022-03-20 09:12:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 09:12:57,767 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 153 [2022-03-20 09:12:57,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:12:57,768 INFO L225 Difference]: With dead ends: 186 [2022-03-20 09:12:57,768 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 09:12:57,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37596 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=11837, Invalid=65725, Unknown=0, NotChecked=0, Total=77562 [2022-03-20 09:12:57,772 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 250 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:12:57,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 97 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:12:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 09:12:57,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2022-03-20 09:12:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 155 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:12:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2022-03-20 09:12:57,798 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 153 [2022-03-20 09:12:57,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:12:57,798 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2022-03-20 09:12:57,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:12:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2022-03-20 09:12:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 09:12:57,799 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:12:57,799 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:12:57,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-20 09:12:57,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-20 09:12:58,000 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:12:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:12:58,000 INFO L85 PathProgramCache]: Analyzing trace with hash 634290514, now seen corresponding path program 59 times [2022-03-20 09:12:58,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:12:58,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062050422] [2022-03-20 09:12:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:12:58,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:12:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:58,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:12:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:58,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:12:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:58,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 09:12:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:12:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:12:59,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:12:59,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062050422] [2022-03-20 09:12:59,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062050422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:12:59,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719061464] [2022-03-20 09:12:59,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:12:59,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:12:59,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:12:59,417 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:12:59,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-20 09:12:59,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-03-20 09:12:59,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:12:59,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 09:12:59,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:13:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:01,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:13:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:04,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719061464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:13:04,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:13:04,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 207 [2022-03-20 09:13:04,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001767166] [2022-03-20 09:13:04,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:13:04,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2022-03-20 09:13:04,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:13:04,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2022-03-20 09:13:04,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6959, Invalid=35683, Unknown=0, NotChecked=0, Total=42642 [2022-03-20 09:13:04,812 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:13:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:13:07,622 INFO L93 Difference]: Finished difference Result 181 states and 186 transitions. [2022-03-20 09:13:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 09:13:07,622 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 153 [2022-03-20 09:13:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:13:07,623 INFO L225 Difference]: With dead ends: 181 [2022-03-20 09:13:07,623 INFO L226 Difference]: Without dead ends: 172 [2022-03-20 09:13:07,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37628 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=11837, Invalid=65725, Unknown=0, NotChecked=0, Total=77562 [2022-03-20 09:13:07,627 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 321 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 09:13:07,627 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 120 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 09:13:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-20 09:13:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2022-03-20 09:13:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.0384615384615385) internal successors, (162), 158 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:13:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2022-03-20 09:13:07,652 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 153 [2022-03-20 09:13:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:13:07,652 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2022-03-20 09:13:07,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:13:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2022-03-20 09:13:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 09:13:07,653 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:13:07,653 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:13:07,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-20 09:13:07,853 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-20 09:13:07,853 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:13:07,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:13:07,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1722233848, now seen corresponding path program 60 times [2022-03-20 09:13:07,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:13:07,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51997843] [2022-03-20 09:13:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:13:07,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:13:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:07,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:13:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:07,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:13:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:08,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 09:13:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:08,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:13:08,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51997843] [2022-03-20 09:13:08,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51997843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:13:08,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949690689] [2022-03-20 09:13:08,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:13:08,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:13:08,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:13:09,000 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:13:09,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-20 09:13:09,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-03-20 09:13:09,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:13:09,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-20 09:13:09,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:13:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:11,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:13:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:14,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949690689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:13:14,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:13:14,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 71, 71] total 206 [2022-03-20 09:13:14,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95090833] [2022-03-20 09:13:14,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:13:14,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2022-03-20 09:13:14,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:13:14,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2022-03-20 09:13:14,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7017, Invalid=35213, Unknown=0, NotChecked=0, Total=42230 [2022-03-20 09:13:14,690 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:13:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:13:17,242 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2022-03-20 09:13:17,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 09:13:17,243 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 155 [2022-03-20 09:13:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:13:17,243 INFO L225 Difference]: With dead ends: 183 [2022-03-20 09:13:17,243 INFO L226 Difference]: Without dead ends: 171 [2022-03-20 09:13:17,247 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37275 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=11863, Invalid=64037, Unknown=0, NotChecked=0, Total=75900 [2022-03-20 09:13:17,248 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 301 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:13:17,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 97 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:13:17,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-20 09:13:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2022-03-20 09:13:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 155 states have (on average 1.032258064516129) internal successors, (160), 157 states have internal predecessors, (160), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:13:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 171 transitions. [2022-03-20 09:13:17,273 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 171 transitions. Word has length 155 [2022-03-20 09:13:17,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:13:17,273 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 171 transitions. [2022-03-20 09:13:17,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:13:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 171 transitions. [2022-03-20 09:13:17,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 09:13:17,274 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:13:17,274 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:13:17,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-20 09:13:17,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-20 09:13:17,474 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:13:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:13:17,475 INFO L85 PathProgramCache]: Analyzing trace with hash -407730835, now seen corresponding path program 60 times [2022-03-20 09:13:17,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:13:17,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408669250] [2022-03-20 09:13:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:13:17,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:13:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:17,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:13:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:17,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:13:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:18,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-20 09:13:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:18,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:13:18,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408669250] [2022-03-20 09:13:18,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408669250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:13:18,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32271346] [2022-03-20 09:13:18,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:13:18,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:13:18,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:13:18,888 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:13:18,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-20 09:13:19,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-03-20 09:13:19,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:13:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-20 09:13:19,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:13:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:21,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:13:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:24,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32271346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:13:24,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:13:24,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 71, 71] total 206 [2022-03-20 09:13:24,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945667242] [2022-03-20 09:13:24,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:13:24,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2022-03-20 09:13:24,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:13:24,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2022-03-20 09:13:24,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7017, Invalid=35213, Unknown=0, NotChecked=0, Total=42230 [2022-03-20 09:13:24,197 INFO L87 Difference]: Start difference. First operand 167 states and 171 transitions. Second operand has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:13:27,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:13:27,110 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2022-03-20 09:13:27,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 09:13:27,111 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 155 [2022-03-20 09:13:27,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:13:27,111 INFO L225 Difference]: With dead ends: 177 [2022-03-20 09:13:27,111 INFO L226 Difference]: Without dead ends: 167 [2022-03-20 09:13:27,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37084 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=11863, Invalid=64037, Unknown=0, NotChecked=0, Total=75900 [2022-03-20 09:13:27,116 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 226 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 09:13:27,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 115 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 09:13:27,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-20 09:13:27,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-03-20 09:13:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 154 states have (on average 1.025974025974026) internal successors, (158), 156 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:13:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2022-03-20 09:13:27,142 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 155 [2022-03-20 09:13:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:13:27,142 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2022-03-20 09:13:27,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:13:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2022-03-20 09:13:27,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 09:13:27,143 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:13:27,143 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:13:27,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-20 09:13:27,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:13:27,355 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:13:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:13:27,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1056594323, now seen corresponding path program 61 times [2022-03-20 09:13:27,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:13:27,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983446954] [2022-03-20 09:13:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:13:27,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:13:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:27,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:13:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:27,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:13:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:27,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-20 09:13:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:28,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:13:28,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983446954] [2022-03-20 09:13:28,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983446954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:13:28,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428057180] [2022-03-20 09:13:28,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:13:28,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:13:28,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:13:28,615 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:13:28,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-20 09:13:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:29,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 09:13:29,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:13:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:31,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:13:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:34,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428057180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:13:34,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:13:34,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 213 [2022-03-20 09:13:34,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784321397] [2022-03-20 09:13:34,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:13:34,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-03-20 09:13:34,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:13:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-03-20 09:13:34,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7373, Invalid=37783, Unknown=0, NotChecked=0, Total=45156 [2022-03-20 09:13:34,539 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:13:37,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:13:37,278 INFO L93 Difference]: Finished difference Result 190 states and 197 transitions. [2022-03-20 09:13:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 09:13:37,279 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 157 [2022-03-20 09:13:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:13:37,279 INFO L225 Difference]: With dead ends: 190 [2022-03-20 09:13:37,279 INFO L226 Difference]: Without dead ends: 179 [2022-03-20 09:13:37,284 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39875 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=12533, Invalid=69549, Unknown=0, NotChecked=0, Total=82082 [2022-03-20 09:13:37,285 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 346 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:13:37,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 77 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:13:37,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-20 09:13:37,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 169. [2022-03-20 09:13:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 159 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:13:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2022-03-20 09:13:37,327 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 157 [2022-03-20 09:13:37,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:13:37,327 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2022-03-20 09:13:37,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:13:37,327 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2022-03-20 09:13:37,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 09:13:37,328 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:13:37,328 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:13:37,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-20 09:13:37,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:13:37,529 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:13:37,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:13:37,530 INFO L85 PathProgramCache]: Analyzing trace with hash -647539535, now seen corresponding path program 61 times [2022-03-20 09:13:37,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:13:37,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871488178] [2022-03-20 09:13:37,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:13:37,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:13:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:37,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:13:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:37,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:13:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:38,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-20 09:13:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:39,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:13:39,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871488178] [2022-03-20 09:13:39,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871488178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:13:39,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059513726] [2022-03-20 09:13:39,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:13:39,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:13:39,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:13:39,033 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:13:39,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-20 09:13:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:39,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 09:13:39,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:13:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:41,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:13:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:44,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059513726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:13:44,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:13:44,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 213 [2022-03-20 09:13:44,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502486645] [2022-03-20 09:13:44,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:13:44,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-03-20 09:13:44,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:13:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-03-20 09:13:44,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7373, Invalid=37783, Unknown=0, NotChecked=0, Total=45156 [2022-03-20 09:13:44,684 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:13:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:13:47,547 INFO L93 Difference]: Finished difference Result 185 states and 190 transitions. [2022-03-20 09:13:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 09:13:47,547 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 157 [2022-03-20 09:13:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:13:47,548 INFO L225 Difference]: With dead ends: 185 [2022-03-20 09:13:47,548 INFO L226 Difference]: Without dead ends: 176 [2022-03-20 09:13:47,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39908 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=12533, Invalid=69549, Unknown=0, NotChecked=0, Total=82082 [2022-03-20 09:13:47,551 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 212 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:13:47,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 95 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:13:47,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-20 09:13:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2022-03-20 09:13:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 160 states have (on average 1.0375) internal successors, (166), 162 states have internal predecessors, (166), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:13:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 177 transitions. [2022-03-20 09:13:47,578 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 177 transitions. Word has length 157 [2022-03-20 09:13:47,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:13:47,578 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 177 transitions. [2022-03-20 09:13:47,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:13:47,578 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 177 transitions. [2022-03-20 09:13:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-20 09:13:47,578 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:13:47,578 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:13:47,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-20 09:13:47,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-20 09:13:47,779 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:13:47,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:13:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1755796585, now seen corresponding path program 62 times [2022-03-20 09:13:47,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:13:47,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827388442] [2022-03-20 09:13:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:13:47,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:13:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:47,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:13:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:47,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:13:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:48,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-20 09:13:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:48,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:13:48,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827388442] [2022-03-20 09:13:48,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827388442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:13:48,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456814563] [2022-03-20 09:13:48,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:13:48,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:13:48,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:13:48,913 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:13:48,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-20 09:13:49,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:13:49,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:13:49,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 09:13:49,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:13:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:51,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:13:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:54,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456814563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:13:54,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:13:54,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 73, 73] total 212 [2022-03-20 09:13:54,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329232238] [2022-03-20 09:13:54,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:13:54,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2022-03-20 09:13:54,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:13:54,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2022-03-20 09:13:54,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7433, Invalid=37299, Unknown=0, NotChecked=0, Total=44732 [2022-03-20 09:13:54,881 INFO L87 Difference]: Start difference. First operand 172 states and 177 transitions. Second operand has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:13:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:13:57,563 INFO L93 Difference]: Finished difference Result 187 states and 192 transitions. [2022-03-20 09:13:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 09:13:57,563 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 159 [2022-03-20 09:13:57,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:13:57,564 INFO L225 Difference]: With dead ends: 187 [2022-03-20 09:13:57,564 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 09:13:57,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 181 SyntacticMatches, 5 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39544 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=12561, Invalid=67811, Unknown=0, NotChecked=0, Total=80372 [2022-03-20 09:13:57,568 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 156 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:13:57,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 112 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 09:13:57,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 09:13:57,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2022-03-20 09:13:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 161 states have internal predecessors, (164), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:13:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2022-03-20 09:13:57,595 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 159 [2022-03-20 09:13:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:13:57,595 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2022-03-20 09:13:57,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:13:57,595 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2022-03-20 09:13:57,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-20 09:13:57,596 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:13:57,596 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:13:57,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-20 09:13:57,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-20 09:13:57,797 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:13:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:13:57,797 INFO L85 PathProgramCache]: Analyzing trace with hash 37040140, now seen corresponding path program 62 times [2022-03-20 09:13:57,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:13:57,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610650333] [2022-03-20 09:13:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:13:57,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:13:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:57,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:13:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:57,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:13:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:58,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 09:13:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:13:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:13:59,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:13:59,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610650333] [2022-03-20 09:13:59,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610650333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:13:59,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793750937] [2022-03-20 09:13:59,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:13:59,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:13:59,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:13:59,297 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:13:59,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-20 09:13:59,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:13:59,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:13:59,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 09:13:59,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:14:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:01,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:14:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:04,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793750937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:14:04,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:14:04,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 73, 73] total 212 [2022-03-20 09:14:04,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278573631] [2022-03-20 09:14:04,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:14:04,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2022-03-20 09:14:04,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:14:04,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2022-03-20 09:14:04,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7433, Invalid=37299, Unknown=0, NotChecked=0, Total=44732 [2022-03-20 09:14:04,812 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:14:07,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:14:07,770 INFO L93 Difference]: Finished difference Result 181 states and 184 transitions. [2022-03-20 09:14:07,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 09:14:07,771 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 159 [2022-03-20 09:14:07,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:14:07,771 INFO L225 Difference]: With dead ends: 181 [2022-03-20 09:14:07,771 INFO L226 Difference]: Without dead ends: 171 [2022-03-20 09:14:07,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 181 SyntacticMatches, 5 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39347 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=12561, Invalid=67811, Unknown=0, NotChecked=0, Total=80372 [2022-03-20 09:14:07,776 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 224 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 09:14:07,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 145 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2414 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 09:14:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-20 09:14:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-03-20 09:14:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 160 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:14:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2022-03-20 09:14:07,803 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 159 [2022-03-20 09:14:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:14:07,803 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2022-03-20 09:14:07,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:14:07,803 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2022-03-20 09:14:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 09:14:07,804 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:14:07,804 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:14:07,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-20 09:14:08,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:14:08,005 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:14:08,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:14:08,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1015228302, now seen corresponding path program 63 times [2022-03-20 09:14:08,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:14:08,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659382012] [2022-03-20 09:14:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:14:08,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:14:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:08,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:14:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:08,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:14:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:08,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 09:14:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:09,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:14:09,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659382012] [2022-03-20 09:14:09,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659382012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:14:09,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025906006] [2022-03-20 09:14:09,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:14:09,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:14:09,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:14:09,274 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:14:09,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-20 09:14:09,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-03-20 09:14:09,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:14:09,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 09:14:09,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:14:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:11,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:14:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:15,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025906006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:14:15,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:14:15,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 219 [2022-03-20 09:14:15,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243088378] [2022-03-20 09:14:15,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:14:15,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 219 states [2022-03-20 09:14:15,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:14:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2022-03-20 09:14:15,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7799, Invalid=39943, Unknown=0, NotChecked=0, Total=47742 [2022-03-20 09:14:15,576 INFO L87 Difference]: Start difference. First operand 170 states and 173 transitions. Second operand has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:14:18,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:14:18,787 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2022-03-20 09:14:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 09:14:18,787 INFO L78 Accepts]: Start accepts. Automaton has has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 161 [2022-03-20 09:14:18,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:14:18,788 INFO L225 Difference]: With dead ends: 194 [2022-03-20 09:14:18,788 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 09:14:18,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 179 SyntacticMatches, 5 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42221 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=13249, Invalid=73481, Unknown=0, NotChecked=0, Total=86730 [2022-03-20 09:14:18,792 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 261 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 09:14:18,792 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 142 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 09:14:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 09:14:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 173. [2022-03-20 09:14:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.031055900621118) internal successors, (166), 163 states have internal predecessors, (166), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:14:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2022-03-20 09:14:18,819 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 161 [2022-03-20 09:14:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:14:18,820 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2022-03-20 09:14:18,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:14:18,820 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2022-03-20 09:14:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 09:14:18,820 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:14:18,820 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:14:18,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-20 09:14:19,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:14:19,021 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:14:19,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:14:19,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2000144336, now seen corresponding path program 63 times [2022-03-20 09:14:19,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:14:19,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688607614] [2022-03-20 09:14:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:14:19,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:14:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:19,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:14:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:19,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:14:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:19,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 09:14:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:20,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:14:20,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688607614] [2022-03-20 09:14:20,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688607614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:14:20,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124168747] [2022-03-20 09:14:20,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:14:20,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:14:20,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:14:20,602 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:14:20,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-20 09:14:21,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-03-20 09:14:21,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:14:21,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 09:14:21,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:14:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:23,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:14:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:26,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124168747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:14:26,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:14:26,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 219 [2022-03-20 09:14:26,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019324710] [2022-03-20 09:14:26,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:14:26,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 219 states [2022-03-20 09:14:26,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:14:26,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2022-03-20 09:14:26,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7799, Invalid=39943, Unknown=0, NotChecked=0, Total=47742 [2022-03-20 09:14:26,651 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:14:29,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:14:29,810 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2022-03-20 09:14:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 09:14:29,811 INFO L78 Accepts]: Start accepts. Automaton has has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 161 [2022-03-20 09:14:29,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:14:29,811 INFO L225 Difference]: With dead ends: 189 [2022-03-20 09:14:29,811 INFO L226 Difference]: Without dead ends: 180 [2022-03-20 09:14:29,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 179 SyntacticMatches, 5 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42255 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=13249, Invalid=73481, Unknown=0, NotChecked=0, Total=86730 [2022-03-20 09:14:29,815 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 319 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 09:14:29,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 120 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2063 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 09:14:29,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-20 09:14:29,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2022-03-20 09:14:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 164 states have (on average 1.0365853658536586) internal successors, (170), 166 states have internal predecessors, (170), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:14:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 181 transitions. [2022-03-20 09:14:29,843 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 181 transitions. Word has length 161 [2022-03-20 09:14:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:14:29,843 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 181 transitions. [2022-03-20 09:14:29,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:14:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 181 transitions. [2022-03-20 09:14:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 09:14:29,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:14:29,843 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:14:29,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-20 09:14:30,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:14:30,059 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:14:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:14:30,060 INFO L85 PathProgramCache]: Analyzing trace with hash 47764214, now seen corresponding path program 64 times [2022-03-20 09:14:30,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:14:30,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081382256] [2022-03-20 09:14:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:14:30,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:14:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:30,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:14:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:30,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:14:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:30,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 09:14:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:31,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:14:31,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081382256] [2022-03-20 09:14:31,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081382256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:14:31,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540932398] [2022-03-20 09:14:31,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:14:31,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:14:31,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:14:31,254 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:14:31,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-20 09:14:31,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:14:31,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:14:31,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 09:14:31,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:14:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:33,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:14:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1156 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:37,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540932398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:14:37,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:14:37,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 75, 75] total 218 [2022-03-20 09:14:37,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399005627] [2022-03-20 09:14:37,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:14:37,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2022-03-20 09:14:37,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:14:37,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2022-03-20 09:14:37,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7861, Invalid=39445, Unknown=0, NotChecked=0, Total=47306 [2022-03-20 09:14:37,396 INFO L87 Difference]: Start difference. First operand 176 states and 181 transitions. Second operand has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:14:40,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:14:40,359 INFO L93 Difference]: Finished difference Result 191 states and 196 transitions. [2022-03-20 09:14:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 09:14:40,360 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 163 [2022-03-20 09:14:40,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:14:40,360 INFO L225 Difference]: With dead ends: 191 [2022-03-20 09:14:40,360 INFO L226 Difference]: Without dead ends: 179 [2022-03-20 09:14:40,365 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 185 SyntacticMatches, 5 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41880 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=13279, Invalid=71693, Unknown=0, NotChecked=0, Total=84972 [2022-03-20 09:14:40,365 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 275 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 09:14:40,365 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 142 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 09:14:40,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-20 09:14:40,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2022-03-20 09:14:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 163 states have (on average 1.030674846625767) internal successors, (168), 165 states have internal predecessors, (168), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:14:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 179 transitions. [2022-03-20 09:14:40,393 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 179 transitions. Word has length 163 [2022-03-20 09:14:40,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:14:40,393 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 179 transitions. [2022-03-20 09:14:40,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:14:40,393 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 179 transitions. [2022-03-20 09:14:40,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 09:14:40,394 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:14:40,394 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:14:40,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-20 09:14:40,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-20 09:14:40,595 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:14:40,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:14:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash 671468139, now seen corresponding path program 64 times [2022-03-20 09:14:40,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:14:40,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264033833] [2022-03-20 09:14:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:14:40,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:14:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:40,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:14:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:40,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:14:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:41,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-20 09:14:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:42,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:14:42,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264033833] [2022-03-20 09:14:42,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264033833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:14:42,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590477642] [2022-03-20 09:14:42,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:14:42,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:14:42,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:14:42,201 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:14:42,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-20 09:14:42,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:14:42,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:14:42,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 09:14:42,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:14:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:44,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:14:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1156 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:48,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590477642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:14:48,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:14:48,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 75, 75] total 218 [2022-03-20 09:14:48,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198122164] [2022-03-20 09:14:48,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:14:48,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2022-03-20 09:14:48,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:14:48,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2022-03-20 09:14:48,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7861, Invalid=39445, Unknown=0, NotChecked=0, Total=47306 [2022-03-20 09:14:48,039 INFO L87 Difference]: Start difference. First operand 175 states and 179 transitions. Second operand has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:14:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:14:50,784 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2022-03-20 09:14:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 09:14:50,784 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 163 [2022-03-20 09:14:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:14:50,785 INFO L225 Difference]: With dead ends: 185 [2022-03-20 09:14:50,785 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 09:14:50,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 185 SyntacticMatches, 5 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41677 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=13279, Invalid=71693, Unknown=0, NotChecked=0, Total=84972 [2022-03-20 09:14:50,788 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 216 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:14:50,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 100 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 09:14:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 09:14:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-03-20 09:14:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 164 states have internal predecessors, (166), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:14:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 177 transitions. [2022-03-20 09:14:50,816 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 177 transitions. Word has length 163 [2022-03-20 09:14:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:14:50,816 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 177 transitions. [2022-03-20 09:14:50,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:14:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 177 transitions. [2022-03-20 09:14:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 09:14:50,817 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:14:50,817 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:14:50,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-20 09:14:51,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-20 09:14:51,018 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:14:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:14:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1215277295, now seen corresponding path program 65 times [2022-03-20 09:14:51,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:14:51,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393516297] [2022-03-20 09:14:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:14:51,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:14:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:51,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:14:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:51,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:14:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:51,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-20 09:14:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:14:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:52,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:14:52,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393516297] [2022-03-20 09:14:52,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393516297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:14:52,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077763519] [2022-03-20 09:14:52,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:14:52,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:14:52,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:14:52,280 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:14:52,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-20 09:14:52,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-03-20 09:14:52,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:14:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 09:14:52,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:14:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:55,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:14:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:14:58,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077763519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:14:58,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:14:58,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 225 [2022-03-20 09:14:58,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11574638] [2022-03-20 09:14:58,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:14:58,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 225 states [2022-03-20 09:14:58,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:14:58,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2022-03-20 09:14:58,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8237, Invalid=42163, Unknown=0, NotChecked=0, Total=50400 [2022-03-20 09:14:58,902 INFO L87 Difference]: Start difference. First operand 174 states and 177 transitions. Second operand has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:15:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:15:02,224 INFO L93 Difference]: Finished difference Result 198 states and 205 transitions. [2022-03-20 09:15:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 09:15:02,224 INFO L78 Accepts]: Start accepts. Automaton has has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 165 [2022-03-20 09:15:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:15:02,225 INFO L225 Difference]: With dead ends: 198 [2022-03-20 09:15:02,225 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 09:15:02,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44634 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=13985, Invalid=77521, Unknown=0, NotChecked=0, Total=91506 [2022-03-20 09:15:02,228 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 234 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 09:15:02,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 137 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 09:15:02,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 09:15:02,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2022-03-20 09:15:02,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 165 states have (on average 1.0303030303030303) internal successors, (170), 167 states have internal predecessors, (170), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:15:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-03-20 09:15:02,257 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 165 [2022-03-20 09:15:02,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:15:02,257 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-03-20 09:15:02,257 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:15:02,258 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-03-20 09:15:02,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 09:15:02,258 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:15:02,258 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:15:02,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-20 09:15:02,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-20 09:15:02,459 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:15:02,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:15:02,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1760373423, now seen corresponding path program 65 times [2022-03-20 09:15:02,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:15:02,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723034469] [2022-03-20 09:15:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:15:02,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:15:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:02,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:15:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:02,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:15:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:03,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-20 09:15:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:15:04,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:15:04,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723034469] [2022-03-20 09:15:04,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723034469] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:15:04,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231946152] [2022-03-20 09:15:04,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:15:04,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:15:04,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:15:04,123 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:15:04,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-20 09:15:04,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-03-20 09:15:04,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:15:04,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 09:15:04,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:15:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:15:06,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:15:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:15:10,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231946152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:15:10,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:15:10,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 225 [2022-03-20 09:15:10,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732334224] [2022-03-20 09:15:10,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:15:10,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 225 states [2022-03-20 09:15:10,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:15:10,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2022-03-20 09:15:10,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8237, Invalid=42163, Unknown=0, NotChecked=0, Total=50400 [2022-03-20 09:15:10,339 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:15:13,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:15:13,507 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2022-03-20 09:15:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 09:15:13,507 INFO L78 Accepts]: Start accepts. Automaton has has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 165 [2022-03-20 09:15:13,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:15:13,508 INFO L225 Difference]: With dead ends: 193 [2022-03-20 09:15:13,508 INFO L226 Difference]: Without dead ends: 184 [2022-03-20 09:15:13,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44669 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=13985, Invalid=77521, Unknown=0, NotChecked=0, Total=91506 [2022-03-20 09:15:13,512 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 315 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 09:15:13,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 115 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 09:15:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-20 09:15:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2022-03-20 09:15:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 168 states have (on average 1.0357142857142858) internal successors, (174), 170 states have internal predecessors, (174), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:15:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2022-03-20 09:15:13,542 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 165 [2022-03-20 09:15:13,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:15:13,542 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2022-03-20 09:15:13,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:15:13,543 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2022-03-20 09:15:13,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 09:15:13,543 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:15:13,543 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:15:13,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-20 09:15:13,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-20 09:15:13,744 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:15:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:15:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1556150805, now seen corresponding path program 66 times [2022-03-20 09:15:13,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:15:13,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778244556] [2022-03-20 09:15:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:15:13,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:15:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:13,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:15:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:13,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:15:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:14,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-20 09:15:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1156 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:15:15,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:15:15,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778244556] [2022-03-20 09:15:15,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778244556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:15:15,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447708395] [2022-03-20 09:15:15,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:15:15,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:15:15,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:15:15,018 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:15:15,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-20 09:15:15,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2022-03-20 09:15:15,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:15:15,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 09:15:15,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:15:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1156 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:15:17,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:15:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1225 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:15:21,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447708395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:15:21,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:15:21,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 77, 77] total 224 [2022-03-20 09:15:21,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688451252] [2022-03-20 09:15:21,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:15:21,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2022-03-20 09:15:21,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:15:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2022-03-20 09:15:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8301, Invalid=41651, Unknown=0, NotChecked=0, Total=49952 [2022-03-20 09:15:21,421 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:15:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:15:24,600 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2022-03-20 09:15:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 09:15:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 167 [2022-03-20 09:15:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:15:24,601 INFO L225 Difference]: With dead ends: 195 [2022-03-20 09:15:24,601 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 09:15:24,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 189 SyntacticMatches, 5 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44283 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=14017, Invalid=75683, Unknown=0, NotChecked=0, Total=89700 [2022-03-20 09:15:24,605 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 169 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2276 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 09:15:24,605 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 132 Invalid, 2406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2276 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 09:15:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 09:15:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2022-03-20 09:15:24,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 167 states have (on average 1.029940119760479) internal successors, (172), 169 states have internal predecessors, (172), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:15:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 183 transitions. [2022-03-20 09:15:24,636 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 183 transitions. Word has length 167 [2022-03-20 09:15:24,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:15:24,636 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 183 transitions. [2022-03-20 09:15:24,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:15:24,636 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 183 transitions. [2022-03-20 09:15:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 09:15:24,637 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:15:24,637 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:15:24,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-20 09:15:24,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:15:24,851 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:15:24,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:15:24,852 INFO L85 PathProgramCache]: Analyzing trace with hash -370301814, now seen corresponding path program 66 times [2022-03-20 09:15:24,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:15:24,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808857961] [2022-03-20 09:15:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:15:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:15:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:24,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:15:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:24,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:15:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:25,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-20 09:15:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1156 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:15:26,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:15:26,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808857961] [2022-03-20 09:15:26,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808857961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:15:26,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715588446] [2022-03-20 09:15:26,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:15:26,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:15:26,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:15:26,492 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:15:26,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-20 09:15:27,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2022-03-20 09:15:27,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:15:27,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 09:15:27,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:15:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1156 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:15:29,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:15:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1225 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:15:32,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715588446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:15:32,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:15:32,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 77, 77] total 224 [2022-03-20 09:15:32,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537132052] [2022-03-20 09:15:32,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:15:32,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2022-03-20 09:15:32,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:15:32,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2022-03-20 09:15:32,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8301, Invalid=41651, Unknown=0, NotChecked=0, Total=49952 [2022-03-20 09:15:32,984 INFO L87 Difference]: Start difference. First operand 179 states and 183 transitions. Second operand has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:15:36,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:15:36,030 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2022-03-20 09:15:36,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 09:15:36,031 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 167 [2022-03-20 09:15:36,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:15:36,031 INFO L225 Difference]: With dead ends: 189 [2022-03-20 09:15:36,031 INFO L226 Difference]: Without dead ends: 179 [2022-03-20 09:15:36,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 189 SyntacticMatches, 5 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44074 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=14017, Invalid=75683, Unknown=0, NotChecked=0, Total=89700 [2022-03-20 09:15:36,034 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 262 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 09:15:36,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 105 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 09:15:36,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-20 09:15:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-03-20 09:15:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 168 states have internal predecessors, (170), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:15:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2022-03-20 09:15:36,064 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 167 [2022-03-20 09:15:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:15:36,064 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2022-03-20 09:15:36,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:15:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2022-03-20 09:15:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 09:15:36,065 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:15:36,065 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:15:36,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-20 09:15:36,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-20 09:15:36,265 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:15:36,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:15:36,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1628822160, now seen corresponding path program 67 times [2022-03-20 09:15:36,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:15:36,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454641430] [2022-03-20 09:15:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:15:36,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:15:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:36,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:15:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:36,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 09:15:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:15:36,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-20 09:15:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat