/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 03:41:04,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:41:04,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:41:04,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 03:41:04,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 03:41:04,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 03:41:04,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 03:41:04,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 03:41:04,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 03:41:04,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 03:41:04,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 03:41:04,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 03:41:04,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 03:41:04,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 03:41:04,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 03:41:04,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 03:41:04,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 03:41:04,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 03:41:04,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 03:41:04,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 03:41:04,284 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 03:41:04,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 03:41:04,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 03:41:04,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 03:41:04,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 03:41:04,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 03:41:04,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 03:41:04,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 03:41:04,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 03:41:04,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 03:41:04,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 03:41:04,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 03:41:04,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 03:41:04,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 03:41:04,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 03:41:04,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 03:41:04,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 03:41:04,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 03:41:04,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 03:41:04,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:41:04,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:41:04,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:41:04,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:41:04,315 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:41:04,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:41:04,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:41:04,317 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:41:04,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:41:04,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:41:04,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:41:04,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:41:04,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:41:04,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:41:04,319 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:41:04,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:41:04,319 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:41:04,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:41:04,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:41:04,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:41:04,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:41:04,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:41:04,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:41:04,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:41:04,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:41:04,321 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:41:04,321 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:41:04,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:41:04,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:41:04,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:41:04,589 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:41:04,589 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:41:04,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-20 03:41:04,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32f360ce1/efd996b768f44c8eae706d5f729bfa58/FLAGcd91dbc82 [2022-03-20 03:41:05,019 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:41:05,019 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-20 03:41:05,024 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32f360ce1/efd996b768f44c8eae706d5f729bfa58/FLAGcd91dbc82 [2022-03-20 03:41:05,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32f360ce1/efd996b768f44c8eae706d5f729bfa58 [2022-03-20 03:41:05,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:41:05,455 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:41:05,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:41:05,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:41:05,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:41:05,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:41:05" (1/1) ... [2022-03-20 03:41:05,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cdda21f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:05, skipping insertion in model container [2022-03-20 03:41:05,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:41:05" (1/1) ... [2022-03-20 03:41:05,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:41:05,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:41:05,641 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i[1009,1022] [2022-03-20 03:41:05,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:41:05,670 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:41:05,681 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i[1009,1022] [2022-03-20 03:41:05,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:41:05,700 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:41:05,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:05 WrapperNode [2022-03-20 03:41:05,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:41:05,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:41:05,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:41:05,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:41:05,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:05" (1/1) ... [2022-03-20 03:41:05,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:05" (1/1) ... [2022-03-20 03:41:05,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:05" (1/1) ... [2022-03-20 03:41:05,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:05" (1/1) ... [2022-03-20 03:41:05,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:05" (1/1) ... [2022-03-20 03:41:05,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:05" (1/1) ... [2022-03-20 03:41:05,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:05" (1/1) ... [2022-03-20 03:41:05,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:41:05,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:41:05,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:41:05,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:41:05,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:05" (1/1) ... [2022-03-20 03:41:05,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:41:05,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:05,791 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 03:41:05,827 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 03:41:05,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:41:05,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:41:05,851 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:41:05,851 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 03:41:05,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 03:41:05,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:41:05,852 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-20 03:41:05,852 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:41:05,852 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:41:05,852 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 03:41:05,852 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 03:41:05,852 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:41:05,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:41:05,853 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 03:41:05,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:41:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 03:41:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:41:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-20 03:41:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:41:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:41:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:41:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:41:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:41:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:41:05,926 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:41:05,927 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:41:06,073 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:41:06,077 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:41:06,078 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 03:41:06,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:41:06 BoogieIcfgContainer [2022-03-20 03:41:06,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:41:06,080 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:41:06,080 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:41:06,096 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:41:06,099 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:41:06" (1/1) ... [2022-03-20 03:41:06,101 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:41:06,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:41:06 BasicIcfg [2022-03-20 03:41:06,127 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:41:06,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:41:06,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:41:06,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:41:06,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:41:05" (1/4) ... [2022-03-20 03:41:06,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc4ef74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:41:06, skipping insertion in model container [2022-03-20 03:41:06,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:05" (2/4) ... [2022-03-20 03:41:06,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc4ef74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:41:06, skipping insertion in model container [2022-03-20 03:41:06,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:41:06" (3/4) ... [2022-03-20 03:41:06,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc4ef74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:41:06, skipping insertion in model container [2022-03-20 03:41:06,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:41:06" (4/4) ... [2022-03-20 03:41:06,134 INFO L111 eAbstractionObserver]: Analyzing ICFG mcmillan2006.iJordan [2022-03-20 03:41:06,137 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:41:06,138 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:41:06,185 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:41:06,190 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 03:41:06,191 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:41:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:41:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 03:41:06,211 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:06,211 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:06,212 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1476197606, now seen corresponding path program 1 times [2022-03-20 03:41:06,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:06,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340738686] [2022-03-20 03:41:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:06,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:06,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:06,405 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 03:41:06,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:06,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340738686] [2022-03-20 03:41:06,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340738686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:41:06,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:41:06,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 03:41:06,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279339207] [2022-03-20 03:41:06,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:41:06,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 03:41:06,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:06,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 03:41:06,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:41:06,443 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:06,480 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-03-20 03:41:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 03:41:06,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 03:41:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:06,491 INFO L225 Difference]: With dead ends: 25 [2022-03-20 03:41:06,491 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 03:41:06,493 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:41:06,497 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:06,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:41:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 03:41:06,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-20 03:41:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:41:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-03-20 03:41:06,527 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2022-03-20 03:41:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:06,527 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-03-20 03:41:06,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:06,528 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-03-20 03:41:06,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 03:41:06,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:06,530 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:06,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 03:41:06,531 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:06,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:06,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1931266009, now seen corresponding path program 1 times [2022-03-20 03:41:06,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:06,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769327934] [2022-03-20 03:41:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:06,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:06,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:06,652 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 03:41:06,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:06,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769327934] [2022-03-20 03:41:06,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769327934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:41:06,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:41:06,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 03:41:06,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410187278] [2022-03-20 03:41:06,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:41:06,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:41:06,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:06,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:41:06,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:41:06,655 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:06,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:06,735 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-03-20 03:41:06,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 03:41:06,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 03:41:06,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:06,737 INFO L225 Difference]: With dead ends: 24 [2022-03-20 03:41:06,737 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 03:41:06,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-20 03:41:06,738 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:06,738 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:41:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 03:41:06,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-20 03:41:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:41:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-20 03:41:06,742 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-03-20 03:41:06,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:06,742 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-20 03:41:06,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-20 03:41:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 03:41:06,743 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:06,743 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:06,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 03:41:06,743 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:06,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1791050651, now seen corresponding path program 1 times [2022-03-20 03:41:06,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:06,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929692091] [2022-03-20 03:41:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:06,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:06,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:06,927 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 03:41:06,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:06,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929692091] [2022-03-20 03:41:06,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929692091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:06,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812828239] [2022-03-20 03:41:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:06,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:06,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:06,930 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 03:41:06,932 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 03:41:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:06,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 03:41:06,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:07,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-20 03:41:07,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-20 03:41:07,154 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 03:41:07,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:07,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-03-20 03:41:07,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-03-20 03:41:07,264 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 03:41:07,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812828239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:07,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:07,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-03-20 03:41:07,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689881834] [2022-03-20 03:41:07,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:07,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 03:41:07,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:07,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 03:41:07,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-20 03:41:07,268 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:07,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:07,532 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-03-20 03:41:07,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 03:41:07,533 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-20 03:41:07,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:07,535 INFO L225 Difference]: With dead ends: 30 [2022-03-20 03:41:07,535 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 03:41:07,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-03-20 03:41:07,539 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:07,540 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 58 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:41:07,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 03:41:07,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-03-20 03:41:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:41:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-03-20 03:41:07,548 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2022-03-20 03:41:07,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:07,549 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-03-20 03:41:07,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:07,549 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-03-20 03:41:07,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 03:41:07,551 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:07,551 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:07,571 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 03:41:07,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:07,772 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1619165115, now seen corresponding path program 1 times [2022-03-20 03:41:07,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:07,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302766876] [2022-03-20 03:41:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:07,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:07,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:07,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 03:41:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:07,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:07,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302766876] [2022-03-20 03:41:07,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302766876] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:07,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127183245] [2022-03-20 03:41:07,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:07,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:07,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:07,875 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 03:41:07,876 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 03:41:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:07,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 03:41:07,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:08,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:08,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127183245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:08,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:08,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-20 03:41:08,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440852610] [2022-03-20 03:41:08,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:08,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 03:41:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 03:41:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 03:41:08,103 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 03:41:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:08,197 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-03-20 03:41:08,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 03:41:08,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2022-03-20 03:41:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:08,201 INFO L225 Difference]: With dead ends: 36 [2022-03-20 03:41:08,201 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 03:41:08,202 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-20 03:41:08,205 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:08,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 37 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:41:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 03:41:08,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-20 03:41:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:41:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-03-20 03:41:08,220 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2022-03-20 03:41:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:08,221 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-03-20 03:41:08,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 03:41:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-03-20 03:41:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 03:41:08,226 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:08,226 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:08,245 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 03:41:08,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 03:41:08,445 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:08,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:08,446 INFO L85 PathProgramCache]: Analyzing trace with hash -290697607, now seen corresponding path program 2 times [2022-03-20 03:41:08,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:08,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710439917] [2022-03-20 03:41:08,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:08,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:08,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:08,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 03:41:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:08,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:08,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710439917] [2022-03-20 03:41:08,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710439917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:08,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629042149] [2022-03-20 03:41:08,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:41:08,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:08,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:08,601 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 03:41:08,603 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 03:41:08,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:41:08,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:41:08,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 03:41:08,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:08,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:41:10,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 03:41:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:10,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:12,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 03:41:12,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 03:41:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:12,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629042149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:12,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:12,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 17 [2022-03-20 03:41:12,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244034953] [2022-03-20 03:41:12,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:12,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 03:41:12,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:12,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 03:41:12,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=227, Unknown=2, NotChecked=0, Total=272 [2022-03-20 03:41:12,954 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 03:41:19,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:19,487 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-03-20 03:41:19,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 03:41:19,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-03-20 03:41:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:19,488 INFO L225 Difference]: With dead ends: 48 [2022-03-20 03:41:19,489 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 03:41:19,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=126, Invalid=680, Unknown=6, NotChecked=0, Total=812 [2022-03-20 03:41:19,490 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:19,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 75 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 211 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-03-20 03:41:19,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 03:41:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2022-03-20 03:41:19,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 03:41:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-03-20 03:41:19,496 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 26 [2022-03-20 03:41:19,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:19,496 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-03-20 03:41:19,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 03:41:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-03-20 03:41:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 03:41:19,497 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:19,497 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:19,514 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 03:41:19,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:19,708 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:19,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:19,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1717738057, now seen corresponding path program 3 times [2022-03-20 03:41:19,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:19,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177107096] [2022-03-20 03:41:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:19,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:19,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:19,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:41:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:19,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:19,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177107096] [2022-03-20 03:41:19,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177107096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:19,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089598899] [2022-03-20 03:41:19,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:41:19,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:19,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:19,864 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 03:41:19,866 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 03:41:19,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 03:41:19,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:41:19,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 03:41:19,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:19,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:41:19,975 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:41:19,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 03:41:22,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 03:41:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 03:41:22,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:24,608 WARN L833 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 4)) 0)) is different from false [2022-03-20 03:41:24,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-03-20 03:41:24,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-03-20 03:41:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-03-20 03:41:24,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089598899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:24,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:24,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 19 [2022-03-20 03:41:24,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603826316] [2022-03-20 03:41:24,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:24,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 03:41:24,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:24,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 03:41:24,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=258, Unknown=3, NotChecked=32, Total=342 [2022-03-20 03:41:24,654 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 03:41:25,154 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (<= c_main_~i~0 1) (<= 1 c_main_~i~0) (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 4)) 0)) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ (* c_main_~i~0 4) c_main_~x~0.offset)) 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-20 03:41:25,560 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~x~0.offset 4))) (and (= (select (select |c_#memory_int| c_main_~x~0.base) .cse0) 0) (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 4)) 0)) (not (= .cse0 (+ (* c_main_~i~0 4) c_main_~x~0.offset))))) is different from false [2022-03-20 03:41:25,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:25,724 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2022-03-20 03:41:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 03:41:25,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-03-20 03:41:25,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:25,725 INFO L225 Difference]: With dead ends: 57 [2022-03-20 03:41:25,725 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 03:41:25,725 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=113, Invalid=596, Unknown=5, NotChecked=156, Total=870 [2022-03-20 03:41:25,729 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:25,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 110 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 259 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-03-20 03:41:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 03:41:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 37. [2022-03-20 03:41:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 03:41:25,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-03-20 03:41:25,732 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 28 [2022-03-20 03:41:25,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:25,732 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-03-20 03:41:25,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 03:41:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-03-20 03:41:25,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 03:41:25,733 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:25,733 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:25,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 03:41:25,933 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:25,934 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:25,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:25,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1718174257, now seen corresponding path program 4 times [2022-03-20 03:41:25,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:25,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716208756] [2022-03-20 03:41:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:25,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:25,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:26,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 03:41:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:26,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 03:41:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:41:26,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:26,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716208756] [2022-03-20 03:41:26,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716208756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:26,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066281236] [2022-03-20 03:41:26,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 03:41:26,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:26,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:26,030 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 03:41:26,031 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 03:41:26,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 03:41:26,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:41:26,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 03:41:26,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:41:26,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:41:26,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066281236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:26,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:26,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-03-20 03:41:26,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059601172] [2022-03-20 03:41:26,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:26,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 03:41:26,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 03:41:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-20 03:41:26,246 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 03:41:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:26,408 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-03-20 03:41:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 03:41:26,409 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 34 [2022-03-20 03:41:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:26,409 INFO L225 Difference]: With dead ends: 50 [2022-03-20 03:41:26,409 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 03:41:26,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-03-20 03:41:26,410 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:26,411 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 64 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:41:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 03:41:26,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-20 03:41:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 03:41:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-03-20 03:41:26,415 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-03-20 03:41:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:26,415 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-03-20 03:41:26,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 03:41:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-03-20 03:41:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 03:41:26,420 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:26,420 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:26,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 03:41:26,621 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:26,621 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:26,623 INFO L85 PathProgramCache]: Analyzing trace with hash -770459891, now seen corresponding path program 5 times [2022-03-20 03:41:26,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:26,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325394017] [2022-03-20 03:41:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:26,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:26,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:26,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:41:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:26,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 03:41:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:41:26,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:26,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325394017] [2022-03-20 03:41:26,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325394017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:26,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031856810] [2022-03-20 03:41:26,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 03:41:26,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:26,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:26,858 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 03:41:26,859 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 03:41:26,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-20 03:41:26,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:41:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 03:41:26,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:26,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:41:35,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 03:41:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:41:35,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:35,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 03:41:35,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 03:41:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:41:35,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031856810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:35,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:35,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 20 [2022-03-20 03:41:35,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956230327] [2022-03-20 03:41:35,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:35,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 03:41:35,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:35,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 03:41:35,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=325, Unknown=3, NotChecked=0, Total=380 [2022-03-20 03:41:35,641 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 03:41:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:36,292 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2022-03-20 03:41:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 03:41:36,293 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2022-03-20 03:41:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:36,294 INFO L225 Difference]: With dead ends: 50 [2022-03-20 03:41:36,294 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 03:41:36,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=140, Invalid=913, Unknown=3, NotChecked=0, Total=1056 [2022-03-20 03:41:36,295 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:36,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 90 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 293 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-03-20 03:41:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 03:41:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-03-20 03:41:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 03:41:36,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-03-20 03:41:36,298 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 36 [2022-03-20 03:41:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:36,299 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-03-20 03:41:36,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 03:41:36,299 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-03-20 03:41:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 03:41:36,299 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:36,300 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:36,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 03:41:36,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:36,512 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:36,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:36,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1431940509, now seen corresponding path program 6 times [2022-03-20 03:41:36,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:36,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046279186] [2022-03-20 03:41:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:36,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:36,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:36,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:41:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:36,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 03:41:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:36,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 03:41:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 03:41:36,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:36,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046279186] [2022-03-20 03:41:36,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046279186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:36,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315781681] [2022-03-20 03:41:36,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 03:41:36,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:36,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:36,670 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 03:41:36,672 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 03:41:36,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 03:41:36,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:41:36,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 03:41:36,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 03:41:36,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 03:41:36,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315781681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:36,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:36,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-03-20 03:41:36,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455087483] [2022-03-20 03:41:36,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:36,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 03:41:36,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:36,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 03:41:36,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-20 03:41:36,985 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 03:41:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:37,167 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-03-20 03:41:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 03:41:37,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 44 [2022-03-20 03:41:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:37,168 INFO L225 Difference]: With dead ends: 64 [2022-03-20 03:41:37,168 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 03:41:37,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-03-20 03:41:37,169 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:37,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 61 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:41:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 03:41:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-20 03:41:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 03:41:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-03-20 03:41:37,174 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-03-20 03:41:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:37,174 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-03-20 03:41:37,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 03:41:37,175 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-03-20 03:41:37,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 03:41:37,175 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:37,175 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:37,210 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 03:41:37,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:37,388 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:37,388 INFO L85 PathProgramCache]: Analyzing trace with hash -110930399, now seen corresponding path program 7 times [2022-03-20 03:41:37,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:37,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252715946] [2022-03-20 03:41:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:37,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:37,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:37,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 03:41:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:37,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 03:41:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:37,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 03:41:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 03:41:37,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:37,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252715946] [2022-03-20 03:41:37,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252715946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:37,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985699072] [2022-03-20 03:41:37,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 03:41:37,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:37,604 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 03:41:37,610 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 03:41:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:37,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 03:41:37,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:37,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:41:51,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 03:41:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 03:41:51,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:53,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 03:41:53,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 03:41:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 03:41:53,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985699072] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:53,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:53,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 23 [2022-03-20 03:41:53,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629523802] [2022-03-20 03:41:53,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:53,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 03:41:53,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:53,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 03:41:53,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=441, Unknown=4, NotChecked=0, Total=506 [2022-03-20 03:41:53,190 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 20 states have internal predecessors, (50), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 03:41:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:53,522 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-03-20 03:41:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 03:41:53,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 20 states have internal predecessors, (50), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 46 [2022-03-20 03:41:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:53,523 INFO L225 Difference]: With dead ends: 60 [2022-03-20 03:41:53,523 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 03:41:53,524 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=157, Invalid=1171, Unknown=4, NotChecked=0, Total=1332 [2022-03-20 03:41:53,525 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 56 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:53,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 120 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 431 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-03-20 03:41:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 03:41:53,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-03-20 03:41:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 03:41:53,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-03-20 03:41:53,531 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 46 [2022-03-20 03:41:53,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:53,532 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-03-20 03:41:53,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 20 states have internal predecessors, (50), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 03:41:53,532 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-03-20 03:41:53,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 03:41:53,533 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:53,533 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:53,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 03:41:53,743 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,SelfDestructingSolverStorable9 [2022-03-20 03:41:53,744 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:53,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash 692034935, now seen corresponding path program 8 times [2022-03-20 03:41:53,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:53,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312491305] [2022-03-20 03:41:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:53,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:53,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:53,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 03:41:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:53,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 03:41:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:53,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 03:41:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:53,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 03:41:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 03:41:53,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:53,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312491305] [2022-03-20 03:41:53,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312491305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:53,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650170370] [2022-03-20 03:41:53,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:41:53,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:53,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:53,892 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 03:41:53,893 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 03:41:53,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:41:53,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:41:53,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 03:41:53,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 03:41:54,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 03:41:54,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650170370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:54,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:54,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-03-20 03:41:54,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499613114] [2022-03-20 03:41:54,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:54,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 03:41:54,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:54,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 03:41:54,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-20 03:41:54,393 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 03:41:54,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:54,617 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2022-03-20 03:41:54,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 03:41:54,617 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 54 [2022-03-20 03:41:54,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:54,618 INFO L225 Difference]: With dead ends: 78 [2022-03-20 03:41:54,618 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 03:41:54,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2022-03-20 03:41:54,619 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:54,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 38 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:41:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 03:41:54,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-20 03:41:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 03:41:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-03-20 03:41:54,623 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-03-20 03:41:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:54,624 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-03-20 03:41:54,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 03:41:54,624 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-03-20 03:41:54,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 03:41:54,624 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:54,625 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:54,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 03:41:54,825 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:54,825 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:54,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:54,826 INFO L85 PathProgramCache]: Analyzing trace with hash 529632181, now seen corresponding path program 9 times [2022-03-20 03:41:54,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:54,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500288146] [2022-03-20 03:41:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:54,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:55,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:55,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 03:41:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:55,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 03:41:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:55,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 03:41:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:55,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 03:41:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 03:41:55,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:55,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500288146] [2022-03-20 03:41:55,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500288146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:55,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788732725] [2022-03-20 03:41:55,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:41:55,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:55,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:55,112 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 03:41:55,119 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 03:41:55,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-20 03:41:55,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:41:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 03:41:55,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:55,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:41:56,234 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 03:41:56,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 03:41:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 03:41:56,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:56,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788732725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:56,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 03:41:56,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2022-03-20 03:41:56,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589018247] [2022-03-20 03:41:56,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:56,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 03:41:56,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:56,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 03:41:56,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 03:41:56,389 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 10 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 03:41:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:56,917 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2022-03-20 03:41:56,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 03:41:56,918 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 10 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 56 [2022-03-20 03:41:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:56,919 INFO L225 Difference]: With dead ends: 103 [2022-03-20 03:41:56,919 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 03:41:56,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=324, Invalid=2982, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 03:41:56,920 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:56,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 298 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 215 Invalid, 0 Unknown, 160 Unchecked, 0.1s Time] [2022-03-20 03:41:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 03:41:56,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-20 03:41:56,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 03:41:56,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-03-20 03:41:56,936 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2022-03-20 03:41:56,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:56,936 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-03-20 03:41:56,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 10 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 03:41:56,936 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-03-20 03:41:56,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 03:41:56,937 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:56,937 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:56,962 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 03:41:57,138 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,SelfDestructingSolverStorable11 [2022-03-20 03:41:57,139 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:57,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:57,139 INFO L85 PathProgramCache]: Analyzing trace with hash -920591757, now seen corresponding path program 10 times [2022-03-20 03:41:57,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:57,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770379005] [2022-03-20 03:41:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:57,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:57,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:57,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 03:41:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:57,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 03:41:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:57,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 03:41:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:57,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 03:41:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 03:41:57,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:57,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770379005] [2022-03-20 03:41:57,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770379005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:57,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54657872] [2022-03-20 03:41:57,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 03:41:57,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:57,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:57,378 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 03:41:57,422 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 03:41:57,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 03:41:57,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:41:57,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 03:41:57,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:57,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:41:57,584 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-20 03:41:57,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-20 03:42:30,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 03:42:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 03:42:30,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:42:32,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 03:42:32,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 03:42:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 03:42:32,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54657872] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:42:32,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:42:32,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 29 [2022-03-20 03:42:32,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813609083] [2022-03-20 03:42:32,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:42:32,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 03:42:32,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:42:32,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 03:42:32,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=722, Unknown=5, NotChecked=0, Total=812 [2022-03-20 03:42:32,335 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 03:42:40,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:42:40,850 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2022-03-20 03:42:40,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 03:42:40,850 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 58 [2022-03-20 03:42:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:42:40,851 INFO L225 Difference]: With dead ends: 104 [2022-03-20 03:42:40,851 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 03:42:40,852 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 107 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=205, Invalid=1948, Unknown=9, NotChecked=0, Total=2162 [2022-03-20 03:42:40,852 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 03:42:40,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 187 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 650 Invalid, 0 Unknown, 97 Unchecked, 0.3s Time] [2022-03-20 03:42:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 03:42:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2022-03-20 03:42:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 57 states have internal predecessors, (59), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 03:42:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-03-20 03:42:40,856 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 58 [2022-03-20 03:42:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:42:40,856 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-03-20 03:42:40,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 03:42:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-03-20 03:42:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 03:42:40,857 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:42:40,857 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:42:40,877 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 03:42:41,057 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,SelfDestructingSolverStorable12 [2022-03-20 03:42:41,058 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:42:41,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:42:41,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1278575025, now seen corresponding path program 11 times [2022-03-20 03:42:41,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:42:41,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215221329] [2022-03-20 03:42:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:42:41,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:42:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:42:41,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:42:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:42:41,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 03:42:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:42:41,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 03:42:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:42:41,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 03:42:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:42:41,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 03:42:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:42:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 81 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 03:42:41,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:42:41,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215221329] [2022-03-20 03:42:41,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215221329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:42:41,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752806268] [2022-03-20 03:42:41,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 03:42:41,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:42:41,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:42:41,307 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 03:42:41,314 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 03:42:41,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-20 03:42:41,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:42:41,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 03:42:41,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:42:41,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:42:41,448 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:42:41,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 03:42:41,480 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:42:41,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 03:43:13,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 03:43:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 1 proven. 88 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 03:43:13,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:43:16,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 03:43:16,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 03:43:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 80 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 03:43:16,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752806268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:43:16,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:43:16,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 30 [2022-03-20 03:43:16,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342216179] [2022-03-20 03:43:16,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:43:16,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 03:43:16,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:43:16,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 03:43:16,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=773, Unknown=5, NotChecked=0, Total=870 [2022-03-20 03:43:16,230 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 27 states have internal predecessors, (66), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 03:43:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:43:16,743 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2022-03-20 03:43:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 03:43:16,743 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 27 states have internal predecessors, (66), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 60 [2022-03-20 03:43:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:43:16,744 INFO L225 Difference]: With dead ends: 100 [2022-03-20 03:43:16,744 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 03:43:16,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 108 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=245, Invalid=2200, Unknown=5, NotChecked=0, Total=2450 [2022-03-20 03:43:16,745 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 03:43:16,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 185 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 783 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2022-03-20 03:43:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 03:43:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2022-03-20 03:43:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 71 states have internal predecessors, (72), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 03:43:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-03-20 03:43:16,749 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 60 [2022-03-20 03:43:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:43:16,749 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-03-20 03:43:16,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 27 states have internal predecessors, (66), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 03:43:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-03-20 03:43:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 03:43:16,751 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:43:16,751 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:43:16,781 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 03:43:16,967 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,SelfDestructingSolverStorable13 [2022-03-20 03:43:16,967 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:43:16,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:43:16,967 INFO L85 PathProgramCache]: Analyzing trace with hash -694372407, now seen corresponding path program 12 times [2022-03-20 03:43:16,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:43:16,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238227081] [2022-03-20 03:43:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:43:16,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:43:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:17,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:43:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:17,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 03:43:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:17,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 03:43:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:17,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 03:43:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:17,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 03:43:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:17,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 03:43:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 03:43:17,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:43:17,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238227081] [2022-03-20 03:43:17,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238227081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:43:17,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179875583] [2022-03-20 03:43:17,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 03:43:17,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:43:17,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:43:17,193 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 03:43:17,195 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 03:43:17,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 03:43:17,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:43:17,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 03:43:17,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:43:17,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:43:18,538 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 03:43:18,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 03:43:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 03:43:18,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:43:18,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179875583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:43:18,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 03:43:18,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2022-03-20 03:43:18,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276086624] [2022-03-20 03:43:18,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 03:43:18,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 03:43:18,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:43:18,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 03:43:18,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 03:43:18,676 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 35 states have internal predecessors, (77), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 03:43:19,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:43:19,167 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2022-03-20 03:43:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 03:43:19,167 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 35 states have internal predecessors, (77), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 66 [2022-03-20 03:43:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:43:19,169 INFO L225 Difference]: With dead ends: 122 [2022-03-20 03:43:19,169 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 03:43:19,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=364, Invalid=3542, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 03:43:19,170 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:43:19,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 319 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 284 Invalid, 0 Unknown, 153 Unchecked, 0.1s Time] [2022-03-20 03:43:19,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 03:43:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-20 03:43:19,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 03:43:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-03-20 03:43:19,173 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2022-03-20 03:43:19,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:43:19,173 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-03-20 03:43:19,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 35 states have internal predecessors, (77), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 03:43:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-03-20 03:43:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 03:43:19,174 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:43:19,174 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:43:19,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 03:43:19,375 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,SelfDestructingSolverStorable14 [2022-03-20 03:43:19,375 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:43:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:43:19,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1865758983, now seen corresponding path program 13 times [2022-03-20 03:43:19,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:43:19,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980943153] [2022-03-20 03:43:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:43:19,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:43:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:19,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:43:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:19,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 03:43:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:19,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 03:43:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:19,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 03:43:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:19,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 03:43:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:19,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 03:43:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 99 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 03:43:19,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:43:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980943153] [2022-03-20 03:43:19,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980943153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:43:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277850177] [2022-03-20 03:43:19,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 03:43:19,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:43:19,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:43:19,589 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 03:43:19,595 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 03:43:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:19,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 03:43:19,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:43:19,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:43:19,766 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-20 03:43:19,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-20 03:44:01,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 03:44:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 03:44:01,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:44:03,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 03:44:03,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 03:44:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 99 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 03:44:04,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277850177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:44:04,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:44:04,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 32 [2022-03-20 03:44:04,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958770721] [2022-03-20 03:44:04,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:44:04,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 03:44:04,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:44:04,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 03:44:04,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=892, Unknown=6, NotChecked=0, Total=992 [2022-03-20 03:44:04,029 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 29 states have internal predecessors, (70), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 03:44:04,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:44:04,609 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-03-20 03:44:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 03:44:04,615 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 29 states have internal predecessors, (70), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 68 [2022-03-20 03:44:04,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:44:04,616 INFO L225 Difference]: With dead ends: 124 [2022-03-20 03:44:04,616 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 03:44:04,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 122 SyntacticMatches, 15 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=227, Invalid=2317, Unknown=6, NotChecked=0, Total=2550 [2022-03-20 03:44:04,617 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 03:44:04,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 224 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 916 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-03-20 03:44:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 03:44:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2022-03-20 03:44:04,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 91 states have (on average 1.032967032967033) internal successors, (94), 92 states have internal predecessors, (94), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 03:44:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-03-20 03:44:04,621 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 68 [2022-03-20 03:44:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:44:04,621 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-03-20 03:44:04,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 29 states have internal predecessors, (70), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 03:44:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-03-20 03:44:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 03:44:04,622 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:44:04,623 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:44:04,645 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 03:44:04,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:44:04,836 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:44:04,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:44:04,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1135764165, now seen corresponding path program 14 times [2022-03-20 03:44:04,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:44:04,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904238339] [2022-03-20 03:44:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:44:04,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:44:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:05,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:44:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:05,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 03:44:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:05,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 03:44:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:05,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 03:44:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:05,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 03:44:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:05,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 03:44:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 10 proven. 114 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 03:44:05,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:44:05,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904238339] [2022-03-20 03:44:05,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904238339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:44:05,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431263869] [2022-03-20 03:44:05,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:44:05,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:44:05,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:44:05,164 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 03:44:05,165 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 03:44:05,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:44:05,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:44:05,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 03:44:05,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:44:05,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:44:05,357 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:44:05,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 03:44:05,388 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:44:05,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 03:44:47,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 03:44:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 1 proven. 123 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 03:44:47,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:44:49,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 03:44:49,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 03:44:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 10 proven. 113 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 03:44:49,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431263869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:44:49,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:44:49,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 33 [2022-03-20 03:44:49,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114868826] [2022-03-20 03:44:49,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:44:49,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 03:44:49,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:44:49,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 03:44:49,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=949, Unknown=6, NotChecked=0, Total=1056 [2022-03-20 03:44:49,897 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 33 states, 32 states have (on average 2.3125) internal successors, (74), 30 states have internal predecessors, (74), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 03:44:50,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:44:50,576 INFO L93 Difference]: Finished difference Result 128 states and 131 transitions. [2022-03-20 03:44:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 03:44:50,577 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.3125) internal successors, (74), 30 states have internal predecessors, (74), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 70 [2022-03-20 03:44:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:44:50,577 INFO L225 Difference]: With dead ends: 128 [2022-03-20 03:44:50,578 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 03:44:50,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 127 SyntacticMatches, 17 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=262, Invalid=2594, Unknown=6, NotChecked=0, Total=2862 [2022-03-20 03:44:50,579 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 03:44:50,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 214 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 902 Invalid, 0 Unknown, 89 Unchecked, 0.4s Time] [2022-03-20 03:44:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 03:44:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2022-03-20 03:44:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 03:44:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-03-20 03:44:50,584 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 70 [2022-03-20 03:44:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:44:50,584 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-03-20 03:44:50,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.3125) internal successors, (74), 30 states have internal predecessors, (74), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 03:44:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-03-20 03:44:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 03:44:50,585 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:44:50,586 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:44:50,610 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 03:44:50,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 03:44:50,792 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:44:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:44:50,792 INFO L85 PathProgramCache]: Analyzing trace with hash -578078115, now seen corresponding path program 15 times [2022-03-20 03:44:50,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:44:50,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82175939] [2022-03-20 03:44:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:44:50,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:44:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:51,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:44:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:51,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 03:44:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:51,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 03:44:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:51,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 03:44:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:51,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 03:44:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:51,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 03:44:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:51,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 03:44:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 121 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 03:44:51,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:44:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82175939] [2022-03-20 03:44:51,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82175939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:44:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117977444] [2022-03-20 03:44:51,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:44:51,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:44:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:44:51,114 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 03:44:51,130 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 03:44:51,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-20 03:44:51,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:44:51,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 03:44:51,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:44:51,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:44:52,646 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 03:44:52,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 03:44:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 66 proven. 67 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 03:44:52,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:44:52,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117977444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:44:52,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 03:44:52,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2022-03-20 03:44:52,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690485290] [2022-03-20 03:44:52,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 03:44:52,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 03:44:52,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:44:52,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 03:44:52,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 03:44:52,855 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 39 states have internal predecessors, (87), 14 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 03:44:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:44:53,677 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2022-03-20 03:44:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 03:44:53,677 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 39 states have internal predecessors, (87), 14 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 76 [2022-03-20 03:44:53,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:44:53,678 INFO L225 Difference]: With dead ends: 139 [2022-03-20 03:44:53,678 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 03:44:53,680 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 76 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=433, Invalid=4397, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 03:44:53,680 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:44:53,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 363 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 356 Invalid, 0 Unknown, 225 Unchecked, 0.2s Time] [2022-03-20 03:44:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 03:44:53,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-20 03:44:53,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 64 states have internal predecessors, (65), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 03:44:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-03-20 03:44:53,687 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2022-03-20 03:44:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:44:53,687 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-03-20 03:44:53,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 39 states have internal predecessors, (87), 14 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 03:44:53,688 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-03-20 03:44:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 03:44:53,689 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:44:53,690 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:44:53,747 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 03:44:53,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 03:44:53,903 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:44:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:44:53,904 INFO L85 PathProgramCache]: Analyzing trace with hash -442907109, now seen corresponding path program 16 times [2022-03-20 03:44:53,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:44:53,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774579720] [2022-03-20 03:44:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:44:53,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:44:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:54,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:44:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:54,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 03:44:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:54,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 03:44:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:54,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 03:44:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:54,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 03:44:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:54,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 03:44:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:54,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-20 03:44:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:44:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 12 proven. 136 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 03:44:54,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:44:54,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774579720] [2022-03-20 03:44:54,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774579720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:44:54,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916995659] [2022-03-20 03:44:54,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 03:44:54,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:44:54,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:44:54,285 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 03:44:54,286 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 03:44:54,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 03:44:54,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:44:54,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 03:44:54,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:44:54,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:44:54,527 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-20 03:44:54,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-20 03:45:52,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 03:45:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 03:45:52,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:45:55,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 03:45:55,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 03:45:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 12 proven. 136 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 03:45:55,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916995659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:45:55,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:45:55,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 35 [2022-03-20 03:45:55,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257714620] [2022-03-20 03:45:55,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:45:55,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 03:45:55,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:45:55,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 03:45:55,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1080, Unknown=7, NotChecked=0, Total=1190 [2022-03-20 03:45:55,129 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 32 states have internal predecessors, (78), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 03:45:55,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:45:55,858 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2022-03-20 03:45:55,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 03:45:55,859 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 32 states have internal predecessors, (78), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 78 [2022-03-20 03:45:55,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:45:55,860 INFO L225 Difference]: With dead ends: 141 [2022-03-20 03:45:55,860 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 03:45:55,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 147 SyntacticMatches, 17 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 60.8s TimeCoverageRelationStatistics Valid=249, Invalid=2824, Unknown=7, NotChecked=0, Total=3080 [2022-03-20 03:45:55,861 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 67 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 03:45:55,861 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 261 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1118 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2022-03-20 03:45:55,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 03:45:55,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 92. [2022-03-20 03:45:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 73 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 03:45:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-03-20 03:45:55,868 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 78 [2022-03-20 03:45:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:45:55,868 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-03-20 03:45:55,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 32 states have internal predecessors, (78), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 03:45:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-03-20 03:45:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 03:45:55,871 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:45:55,871 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:45:55,897 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 03:45:56,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:45:56,081 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:45:56,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:45:56,081 INFO L85 PathProgramCache]: Analyzing trace with hash 607410777, now seen corresponding path program 17 times [2022-03-20 03:45:56,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:45:56,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675565551] [2022-03-20 03:45:56,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:45:56,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:45:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:45:56,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:45:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:45:56,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 03:45:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:45:56,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 03:45:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:45:56,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 03:45:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:45:56,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 03:45:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:45:56,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 03:45:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:45:56,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 03:45:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:45:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 12 proven. 153 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 03:45:56,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:45:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675565551] [2022-03-20 03:45:56,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675565551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:45:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709965136] [2022-03-20 03:45:56,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 03:45:56,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:45:56,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:45:56,450 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 03:45:56,451 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 03:45:56,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-20 03:45:56,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:45:56,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 03:45:56,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:45:56,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:45:56,666 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:45:56,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 03:45:56,699 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:45:56,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 03:46:55,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 03:46:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 1 proven. 164 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 03:46:56,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:46:58,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 03:46:58,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 03:46:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 12 proven. 152 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-20 03:46:58,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709965136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:46:58,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:46:58,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 23] total 36 [2022-03-20 03:46:58,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573606286] [2022-03-20 03:46:58,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:46:58,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 03:46:58,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:46:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 03:46:58,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1143, Unknown=7, NotChecked=0, Total=1260 [2022-03-20 03:46:58,365 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 03:46:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:46:59,159 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2022-03-20 03:46:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 03:46:59,160 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 80 [2022-03-20 03:46:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:46:59,161 INFO L225 Difference]: With dead ends: 128 [2022-03-20 03:46:59,161 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 03:46:59,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 144 SyntacticMatches, 19 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 61.9s TimeCoverageRelationStatistics Valid=289, Invalid=3244, Unknown=7, NotChecked=0, Total=3540 [2022-03-20 03:46:59,163 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 68 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 03:46:59,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 257 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1152 Invalid, 0 Unknown, 81 Unchecked, 0.4s Time] [2022-03-20 03:46:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 03:46:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2022-03-20 03:46:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 91 states have (on average 1.032967032967033) internal successors, (94), 93 states have internal predecessors, (94), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 03:46:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 125 transitions. [2022-03-20 03:46:59,168 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 125 transitions. Word has length 80 [2022-03-20 03:46:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:46:59,168 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 125 transitions. [2022-03-20 03:46:59,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 03:46:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 125 transitions. [2022-03-20 03:46:59,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 03:46:59,170 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:46:59,170 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:46:59,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-20 03:46:59,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:46:59,391 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:46:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:46:59,392 INFO L85 PathProgramCache]: Analyzing trace with hash -160730255, now seen corresponding path program 18 times [2022-03-20 03:46:59,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:46:59,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880141162] [2022-03-20 03:46:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:46:59,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:46:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:46:59,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:46:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:46:59,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 03:46:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:46:59,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 03:46:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:46:59,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 03:46:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:46:59,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 03:46:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:46:59,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 03:46:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:46:59,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-20 03:46:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:46:59,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 03:46:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:46:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 14 proven. 162 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 03:46:59,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:46:59,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880141162] [2022-03-20 03:46:59,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880141162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:46:59,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598552789] [2022-03-20 03:46:59,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 03:46:59,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:46:59,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:46:59,675 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 03:46:59,677 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 03:46:59,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 03:46:59,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:46:59,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 03:46:59,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:46:59,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:47:01,763 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 03:47:01,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 03:47:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 91 proven. 85 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 03:47:01,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:47:02,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598552789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:47:02,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 03:47:02,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2022-03-20 03:47:02,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143217670] [2022-03-20 03:47:02,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 03:47:02,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 03:47:02,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:47:02,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 03:47:02,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2028, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 03:47:02,159 INFO L87 Difference]: Start difference. First operand 118 states and 125 transitions. Second operand has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 43 states have internal predecessors, (97), 16 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 03:47:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:47:02,803 INFO L93 Difference]: Finished difference Result 157 states and 159 transitions. [2022-03-20 03:47:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 03:47:02,804 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 43 states have internal predecessors, (97), 16 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 86 [2022-03-20 03:47:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:47:02,804 INFO L225 Difference]: With dead ends: 157 [2022-03-20 03:47:02,804 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 03:47:02,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 85 SyntacticMatches, 14 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=508, Invalid=5344, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 03:47:02,806 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 32 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:47:02,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 375 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 341 Invalid, 0 Unknown, 266 Unchecked, 0.1s Time] [2022-03-20 03:47:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 03:47:02,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-20 03:47:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 03:47:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-03-20 03:47:02,808 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2022-03-20 03:47:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:47:02,809 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-03-20 03:47:02,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 43 states have internal predecessors, (97), 16 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 03:47:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-03-20 03:47:02,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 03:47:02,809 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:47:02,809 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:47:02,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 03:47:03,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:47:03,010 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:47:03,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:47:03,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1942284719, now seen corresponding path program 19 times [2022-03-20 03:47:03,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:47:03,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208413467] [2022-03-20 03:47:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:47:03,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:47:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:47:03,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:47:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:47:03,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 03:47:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:47:03,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 03:47:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:47:03,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 03:47:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:47:03,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 03:47:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:47:03,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 03:47:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:47:03,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 03:47:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:47:03,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-20 03:47:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:47:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 14 proven. 179 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 03:47:03,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:47:03,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208413467] [2022-03-20 03:47:03,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208413467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:47:03,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445026584] [2022-03-20 03:47:03,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 03:47:03,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:47:03,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:47:03,353 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 03:47:03,359 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 03:47:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:47:03,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 03:47:03,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:47:03,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:47:03,536 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-20 03:47:03,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-20 03:48:37,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 03:48:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 03:48:37,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:48:39,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 03:48:39,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 03:48:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 14 proven. 179 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 03:48:39,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445026584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:48:39,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:48:39,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 38 [2022-03-20 03:48:39,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214673704] [2022-03-20 03:48:39,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:48:39,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 03:48:39,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:48:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 03:48:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1286, Unknown=8, NotChecked=0, Total=1406 [2022-03-20 03:48:39,847 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 35 states have internal predecessors, (86), 16 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 03:48:47,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:48:47,135 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2022-03-20 03:48:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 03:48:47,136 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 35 states have internal predecessors, (86), 16 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 88 [2022-03-20 03:48:47,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:48:47,136 INFO L225 Difference]: With dead ends: 159 [2022-03-20 03:48:47,136 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 03:48:47,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 167 SyntacticMatches, 19 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 103.0s TimeCoverageRelationStatistics Valid=284, Invalid=3610, Unknown=12, NotChecked=0, Total=3906 [2022-03-20 03:48:47,138 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 71 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 03:48:47,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 301 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1202 Invalid, 0 Unknown, 175 Unchecked, 0.4s Time] [2022-03-20 03:48:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 03:48:47,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 102. [2022-03-20 03:48:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 03:48:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2022-03-20 03:48:47,140 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 88 [2022-03-20 03:48:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:48:47,141 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2022-03-20 03:48:47,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 35 states have internal predecessors, (86), 16 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 03:48:47,141 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2022-03-20 03:48:47,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 03:48:47,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:48:47,142 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:48:47,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 03:48:47,351 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,SelfDestructingSolverStorable21 [2022-03-20 03:48:47,351 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:48:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:48:47,352 INFO L85 PathProgramCache]: Analyzing trace with hash 10078317, now seen corresponding path program 20 times [2022-03-20 03:48:47,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:48:47,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260354535] [2022-03-20 03:48:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:48:47,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:48:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:48:47,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:48:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:48:47,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 03:48:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:48:47,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 03:48:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:48:47,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 03:48:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:48:47,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 03:48:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:48:47,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 03:48:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:48:47,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 03:48:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:48:47,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 03:48:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:48:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 14 proven. 198 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 03:48:47,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:48:47,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260354535] [2022-03-20 03:48:47,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260354535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:48:47,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385057512] [2022-03-20 03:48:47,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:48:47,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:48:47,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:48:47,739 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 03:48:47,742 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 03:48:47,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:48:47,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:48:47,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 03:48:47,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:48:47,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:48:47,905 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:48:47,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 03:48:47,997 INFO L356 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2022-03-20 03:48:47,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2022-03-20 03:49:58,517 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 03:49:58,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2022-03-20 03:49:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 25 proven. 211 refuted. 20 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 03:49:58,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:49:59,347 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_204 Int)) (or (and (not (<= v_main_~i~0_204 6)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* 4 v_main_~i~0_204)) 0) (+ c_main_~x~0.offset 28)) 0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_204)))) is different from false [2022-03-20 03:49:59,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-03-20 03:49:59,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-03-20 03:49:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 14 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 9 not checked. [2022-03-20 03:49:59,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385057512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:49:59,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:49:59,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 35, 26] total 52 [2022-03-20 03:49:59,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202748047] [2022-03-20 03:49:59,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:49:59,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 03:49:59,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:49:59,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 03:49:59,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2310, Unknown=17, NotChecked=98, Total=2652 [2022-03-20 03:49:59,422 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 52 states, 51 states have (on average 2.0) internal successors, (102), 49 states have internal predecessors, (102), 17 states have call successors, (20), 7 states have call predecessors, (20), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 03:50:00,260 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 7 c_main_~i~0) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ (* c_main_~i~0 4) c_main_~x~0.offset)) 0) (<= c_main_~i~0 7) (forall ((v_main_~i~0_204 Int)) (or (and (not (<= v_main_~i~0_204 6)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* 4 v_main_~i~0_204)) 0) (+ c_main_~x~0.offset 28)) 0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_204)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-20 03:50:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:50:02,125 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2022-03-20 03:50:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 03:50:02,125 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.0) internal successors, (102), 49 states have internal predecessors, (102), 17 states have call successors, (20), 7 states have call predecessors, (20), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 90 [2022-03-20 03:50:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:50:02,126 INFO L225 Difference]: With dead ends: 157 [2022-03-20 03:50:02,126 INFO L226 Difference]: Without dead ends: 157 [2022-03-20 03:50:02,127 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 11 SemanticMatches, 65 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 73.1s TimeCoverageRelationStatistics Valid=310, Invalid=3840, Unknown=18, NotChecked=254, Total=4422 [2022-03-20 03:50:02,127 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 48 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:50:02,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 740 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 551 Invalid, 0 Unknown, 397 Unchecked, 0.2s Time] [2022-03-20 03:50:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-20 03:50:02,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 132. [2022-03-20 03:50:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 104 states have internal predecessors, (105), 16 states have call successors, (16), 14 states have call predecessors, (16), 13 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 03:50:02,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2022-03-20 03:50:02,131 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 90 [2022-03-20 03:50:02,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:50:02,131 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2022-03-20 03:50:02,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.0) internal successors, (102), 49 states have internal predecessors, (102), 17 states have call successors, (20), 7 states have call predecessors, (20), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 03:50:02,131 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2022-03-20 03:50:02,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 03:50:02,132 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:50:02,132 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:50:02,149 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 03:50:02,332 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,SelfDestructingSolverStorable22 [2022-03-20 03:50:02,333 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:50:02,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:50:02,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1012122373, now seen corresponding path program 21 times [2022-03-20 03:50:02,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:50:02,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500863632] [2022-03-20 03:50:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:50:02,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:50:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:02,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:50:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:02,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 03:50:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:02,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 03:50:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:02,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 03:50:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:02,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 03:50:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:02,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 03:50:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:02,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 03:50:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:02,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-20 03:50:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:02,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-20 03:50:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 16 proven. 209 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 03:50:02,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:50:02,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500863632] [2022-03-20 03:50:02,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500863632] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:50:02,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378132316] [2022-03-20 03:50:02,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:50:02,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:50:02,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:50:02,662 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 03:50:02,663 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 03:50:02,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-20 03:50:02,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:50:02,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 03:50:02,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:50:02,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:50:04,798 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 03:50:04,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 03:50:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 03:50:04,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:50:04,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378132316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:50:04,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 03:50:04,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 50 [2022-03-20 03:50:04,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17043806] [2022-03-20 03:50:04,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 03:50:04,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 03:50:04,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:50:04,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 03:50:04,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2388, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 03:50:04,970 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 50 states, 49 states have (on average 2.183673469387755) internal successors, (107), 47 states have internal predecessors, (107), 18 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 03:50:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:50:05,690 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2022-03-20 03:50:05,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 03:50:05,691 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.183673469387755) internal successors, (107), 47 states have internal predecessors, (107), 18 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 96 [2022-03-20 03:50:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:50:05,692 INFO L225 Difference]: With dead ends: 175 [2022-03-20 03:50:05,692 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 03:50:05,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 95 SyntacticMatches, 16 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=591, Invalid=6381, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 03:50:05,693 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 32 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:50:05,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 480 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 317 Invalid, 0 Unknown, 217 Unchecked, 0.1s Time] [2022-03-20 03:50:05,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 03:50:05,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-20 03:50:05,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 80 states have internal predecessors, (81), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 03:50:05,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-03-20 03:50:05,695 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2022-03-20 03:50:05,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:50:05,695 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-03-20 03:50:05,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.183673469387755) internal successors, (107), 47 states have internal predecessors, (107), 18 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 03:50:05,696 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-03-20 03:50:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 03:50:05,696 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:50:05,696 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:50:05,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 03:50:05,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:50:05,904 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:50:05,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:50:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash 406127555, now seen corresponding path program 22 times [2022-03-20 03:50:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:50:05,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399273174] [2022-03-20 03:50:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:50:05,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:50:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:06,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:50:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:06,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 03:50:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:06,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 03:50:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:06,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 03:50:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:06,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 03:50:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:06,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 03:50:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:06,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 03:50:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:06,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 03:50:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:06,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-20 03:50:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:50:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 16 proven. 228 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 03:50:06,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:50:06,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399273174] [2022-03-20 03:50:06,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399273174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:50:06,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906455709] [2022-03-20 03:50:06,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 03:50:06,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:50:06,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:50:06,305 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 03:50:06,325 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 03:50:06,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 03:50:06,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:50:06,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 03:50:06,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:50:06,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:50:06,731 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-20 03:50:06,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-20 03:52:11,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 03:52:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 03:52:11,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:52:13,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 03:52:13,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 03:52:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 16 proven. 228 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 03:52:13,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906455709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:52:13,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:52:13,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 26] total 41 [2022-03-20 03:52:13,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653044606] [2022-03-20 03:52:13,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:52:13,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 03:52:13,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:52:13,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 03:52:13,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1510, Unknown=9, NotChecked=0, Total=1640 [2022-03-20 03:52:13,830 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 41 states, 40 states have (on average 2.35) internal successors, (94), 38 states have internal predecessors, (94), 18 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 03:52:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:52:22,862 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2022-03-20 03:52:22,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 03:52:22,864 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.35) internal successors, (94), 38 states have internal predecessors, (94), 18 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 98 [2022-03-20 03:52:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:52:22,865 INFO L225 Difference]: With dead ends: 177 [2022-03-20 03:52:22,865 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 03:52:22,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 186 SyntacticMatches, 21 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 135.4s TimeCoverageRelationStatistics Valid=306, Invalid=4237, Unknown=13, NotChecked=0, Total=4556 [2022-03-20 03:52:22,866 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 79 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 03:52:22,866 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 355 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1444 Invalid, 0 Unknown, 131 Unchecked, 0.5s Time] [2022-03-20 03:52:22,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 03:52:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 112. [2022-03-20 03:52:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 89 states have internal predecessors, (91), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 03:52:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-03-20 03:52:22,869 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 98 [2022-03-20 03:52:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:52:22,869 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-03-20 03:52:22,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.35) internal successors, (94), 38 states have internal predecessors, (94), 18 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 03:52:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-03-20 03:52:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 03:52:22,869 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:52:22,869 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:52:22,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 03:52:23,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:23,070 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:52:23,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:52:23,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2134307583, now seen corresponding path program 23 times [2022-03-20 03:52:23,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:52:23,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165878650] [2022-03-20 03:52:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:23,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:52:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:23,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:52:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:23,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 03:52:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:23,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 03:52:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:23,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 03:52:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:23,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 03:52:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:23,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 03:52:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:23,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 03:52:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:23,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-20 03:52:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:23,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-20 03:52:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 16 proven. 249 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 03:52:23,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:52:23,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165878650] [2022-03-20 03:52:23,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165878650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:52:23,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615851425] [2022-03-20 03:52:23,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 03:52:23,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:23,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:52:23,463 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 03:52:23,468 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 03:52:23,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-20 03:52:23,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:52:23,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 03:52:23,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:52:23,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:52:23,704 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:52:23,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 03:52:23,755 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:52:23,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 03:54:12,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 03:54:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 1 proven. 264 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 03:54:12,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:54:14,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 03:54:14,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 03:54:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 16 proven. 248 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-20 03:54:14,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615851425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:54:14,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:54:14,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 27] total 42 [2022-03-20 03:54:14,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743041705] [2022-03-20 03:54:14,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:54:14,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 03:54:14,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:54:14,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 03:54:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1585, Unknown=9, NotChecked=0, Total=1722 [2022-03-20 03:54:14,900 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 39 states have internal predecessors, (98), 18 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 03:54:23,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:54:23,818 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2022-03-20 03:54:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 03:54:23,819 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 39 states have internal predecessors, (98), 18 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 100 [2022-03-20 03:54:23,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:54:23,820 INFO L225 Difference]: With dead ends: 156 [2022-03-20 03:54:23,820 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 03:54:23,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 191 SyntacticMatches, 23 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 119.4s TimeCoverageRelationStatistics Valid=326, Invalid=4631, Unknown=13, NotChecked=0, Total=4970 [2022-03-20 03:54:23,821 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 03:54:23,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 338 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1247 Invalid, 0 Unknown, 118 Unchecked, 0.5s Time] [2022-03-20 03:54:23,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 03:54:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2022-03-20 03:54:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 115 states have internal predecessors, (116), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 03:54:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 155 transitions. [2022-03-20 03:54:23,826 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 155 transitions. Word has length 100 [2022-03-20 03:54:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:54:23,827 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 155 transitions. [2022-03-20 03:54:23,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 39 states have internal predecessors, (98), 18 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 03:54:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 155 transitions. [2022-03-20 03:54:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 03:54:23,828 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:54:23,828 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:54:23,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 03:54:24,049 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,SelfDestructingSolverStorable25 [2022-03-20 03:54:24,050 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:54:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:54:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash -110982887, now seen corresponding path program 24 times [2022-03-20 03:54:24,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:54:24,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613732080] [2022-03-20 03:54:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:54:24,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:54:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:24,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:54:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:24,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 03:54:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:24,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 03:54:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:24,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 03:54:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:24,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 03:54:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:24,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 03:54:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:24,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 03:54:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:24,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 03:54:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:24,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-20 03:54:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:24,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-20 03:54:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 18 proven. 262 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 03:54:24,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:54:24,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613732080] [2022-03-20 03:54:24,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613732080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:54:24,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43912863] [2022-03-20 03:54:24,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 03:54:24,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:54:24,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:54:24,603 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 03:54:24,636 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 03:54:24,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-20 03:54:24,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:54:24,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 03:54:24,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:54:25,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:54:27,882 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 03:54:27,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 03:54:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 153 proven. 127 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 03:54:27,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:54:28,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43912863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:54:28,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 03:54:28,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 54 [2022-03-20 03:54:28,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488600888] [2022-03-20 03:54:28,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 03:54:28,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 03:54:28,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:54:28,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 03:54:28,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2777, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 03:54:28,366 INFO L87 Difference]: Start difference. First operand 146 states and 155 transitions. Second operand has 54 states, 53 states have (on average 2.207547169811321) internal successors, (117), 51 states have internal predecessors, (117), 20 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 03:54:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:54:29,159 INFO L93 Difference]: Finished difference Result 193 states and 195 transitions. [2022-03-20 03:54:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 03:54:29,160 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.207547169811321) internal successors, (117), 51 states have internal predecessors, (117), 20 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 106 [2022-03-20 03:54:29,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:54:29,160 INFO L225 Difference]: With dead ends: 193 [2022-03-20 03:54:29,160 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 03:54:29,161 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 106 SyntacticMatches, 18 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=678, Invalid=7512, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 03:54:29,161 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 36 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:54:29,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 445 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 251 Invalid, 0 Unknown, 301 Unchecked, 0.1s Time] [2022-03-20 03:54:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 03:54:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-20 03:54:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 88 states have internal predecessors, (89), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 03:54:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-03-20 03:54:29,164 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2022-03-20 03:54:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:54:29,164 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-03-20 03:54:29,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.207547169811321) internal successors, (117), 51 states have internal predecessors, (117), 20 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 03:54:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-03-20 03:54:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 03:54:29,165 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:54:29,165 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:54:29,189 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 03:54:29,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 03:54:29,375 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:54:29,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:54:29,376 INFO L85 PathProgramCache]: Analyzing trace with hash -563055529, now seen corresponding path program 25 times [2022-03-20 03:54:29,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:54:29,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810543642] [2022-03-20 03:54:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:54:29,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:54:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:29,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:54:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:29,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 03:54:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:29,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 03:54:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:29,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 03:54:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:29,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 03:54:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:29,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 03:54:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:29,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 03:54:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:29,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-20 03:54:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:29,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-20 03:54:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:29,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-20 03:54:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 18 proven. 283 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 03:54:29,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:54:29,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810543642] [2022-03-20 03:54:29,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810543642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:54:29,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971180268] [2022-03-20 03:54:29,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 03:54:29,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:54:29,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:54:29,765 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 03:54:29,771 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 03:54:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:29,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 03:54:29,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:54:29,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 03:54:29,984 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-20 03:54:29,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26