/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 22:38:42,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 22:38:42,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 22:38:42,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 22:38:42,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 22:38:42,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 22:38:42,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 22:38:42,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 22:38:42,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 22:38:42,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 22:38:42,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 22:38:42,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 22:38:42,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 22:38:42,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 22:38:42,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 22:38:42,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 22:38:42,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 22:38:42,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 22:38:42,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 22:38:42,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 22:38:42,267 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 22:38:42,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 22:38:42,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 22:38:42,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 22:38:42,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 22:38:42,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 22:38:42,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 22:38:42,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 22:38:42,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 22:38:42,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 22:38:42,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-18 22:38:42,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 22:38:42,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 22:38:42,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 22:38:42,282 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 22:38:42,304 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 22:38:42,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 22:38:42,306 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 22:38:42,306 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 22:38:42,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 22:38:42,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 22:38:42,307 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 22:38:42,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 22:38:42,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 22:38:42,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 22:38:42,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 22:38:42,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 22:38:42,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 22:38:42,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 22:38:42,308 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 22:38:42,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 22:38:42,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 22:38:42,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 22:38:42,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 22:38:42,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:38:42,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 22:38:42,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 22:38:42,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 22:38:42,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 22:38:42,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 22:38:42,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 22:38:42,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 22:38:42,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 22:38:42,311 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 22:38:42,311 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 22:38:42,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 22:38:42,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 22:38:42,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 22:38:42,524 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 22:38:42,527 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 22:38:42,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-03-18 22:38:42,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5e67ab65/e1f0229f9e1b434bbad8b2fcd137fb01/FLAGd7903109b [2022-03-18 22:38:42,969 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 22:38:42,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-03-18 22:38:42,974 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5e67ab65/e1f0229f9e1b434bbad8b2fcd137fb01/FLAGd7903109b [2022-03-18 22:38:42,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5e67ab65/e1f0229f9e1b434bbad8b2fcd137fb01 [2022-03-18 22:38:42,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 22:38:42,991 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 22:38:42,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 22:38:42,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 22:38:42,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 22:38:43,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:38:42" (1/1) ... [2022-03-18 22:38:43,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f243579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:38:43, skipping insertion in model container [2022-03-18 22:38:43,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:38:42" (1/1) ... [2022-03-18 22:38:43,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 22:38:43,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 22:38:43,228 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c[373,386] [2022-03-18 22:38:43,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:38:43,265 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 22:38:43,276 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c[373,386] [2022-03-18 22:38:43,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:38:43,309 INFO L208 MainTranslator]: Completed translation [2022-03-18 22:38:43,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:38:43 WrapperNode [2022-03-18 22:38:43,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 22:38:43,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 22:38:43,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 22:38:43,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 22:38:43,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:38:43" (1/1) ... [2022-03-18 22:38:43,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:38:43" (1/1) ... [2022-03-18 22:38:43,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:38:43" (1/1) ... [2022-03-18 22:38:43,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:38:43" (1/1) ... [2022-03-18 22:38:43,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:38:43" (1/1) ... [2022-03-18 22:38:43,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:38:43" (1/1) ... [2022-03-18 22:38:43,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:38:43" (1/1) ... [2022-03-18 22:38:43,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 22:38:43,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 22:38:43,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 22:38:43,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 22:38:43,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:38:43" (1/1) ... [2022-03-18 22:38:43,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:38:43,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:38:43,366 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) [2022-03-18 22:38:43,367 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 [2022-03-18 22:38:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 22:38:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 22:38:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 22:38:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 22:38:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-03-18 22:38:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-03-18 22:38:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 22:38:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 22:38:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 22:38:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 22:38:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 22:38:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 22:38:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 22:38:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-03-18 22:38:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-03-18 22:38:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 22:38:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 22:38:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 22:38:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 22:38:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 22:38:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 22:38:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 22:38:43,449 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 22:38:43,451 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 22:38:43,594 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 22:38:43,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 22:38:43,600 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 22:38:43,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:38:43 BoogieIcfgContainer [2022-03-18 22:38:43,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 22:38:43,603 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 22:38:43,603 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 22:38:43,604 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 22:38:43,606 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:38:43" (1/1) ... [2022-03-18 22:38:43,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:38:43 BasicIcfg [2022-03-18 22:38:43,637 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 22:38:43,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 22:38:43,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 22:38:43,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 22:38:43,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 10:38:42" (1/4) ... [2022-03-18 22:38:43,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df3246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:38:43, skipping insertion in model container [2022-03-18 22:38:43,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:38:43" (2/4) ... [2022-03-18 22:38:43,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df3246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:38:43, skipping insertion in model container [2022-03-18 22:38:43,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:38:43" (3/4) ... [2022-03-18 22:38:43,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df3246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:38:43, skipping insertion in model container [2022-03-18 22:38:43,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:38:43" (4/4) ... [2022-03-18 22:38:43,654 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.cqvasr [2022-03-18 22:38:43,658 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 22:38:43,658 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 22:38:43,694 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 22:38:43,700 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 22:38:43,700 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 22:38:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 22:38:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 22:38:43,717 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:43,717 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:43,718 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:43,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:43,722 INFO L85 PathProgramCache]: Analyzing trace with hash -405319789, now seen corresponding path program 1 times [2022-03-18 22:38:43,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:43,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236743246] [2022-03-18 22:38:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:43,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:44,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:44,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:44,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 22:38:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:44,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:44,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236743246] [2022-03-18 22:38:44,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236743246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:38:44,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:38:44,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 22:38:44,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569510357] [2022-03-18 22:38:44,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:38:44,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 22:38:44,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:44,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 22:38:44,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-18 22:38:44,192 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:44,723 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2022-03-18 22:38:44,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 22:38:44,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-03-18 22:38:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:44,733 INFO L225 Difference]: With dead ends: 91 [2022-03-18 22:38:44,734 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 22:38:44,741 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-18 22:38:44,744 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:44,745 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 89 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:38:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 22:38:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-03-18 22:38:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 22:38:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-03-18 22:38:44,776 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2022-03-18 22:38:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:44,777 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-03-18 22:38:44,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-03-18 22:38:44,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 22:38:44,779 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:44,779 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:44,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 22:38:44,780 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:44,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1050440486, now seen corresponding path program 1 times [2022-03-18 22:38:44,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:44,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310122328] [2022-03-18 22:38:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:44,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:44,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:44,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:44,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 22:38:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:44,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:44,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310122328] [2022-03-18 22:38:44,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310122328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:38:44,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:38:44,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 22:38:44,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857947331] [2022-03-18 22:38:44,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:38:44,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 22:38:44,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:44,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 22:38:44,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 22:38:44,855 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 22:38:44,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:44,913 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-03-18 22:38:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 22:38:44,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-03-18 22:38:44,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:44,915 INFO L225 Difference]: With dead ends: 55 [2022-03-18 22:38:44,915 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 22:38:44,916 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 22:38:44,917 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:44,918 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:38:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 22:38:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-18 22:38:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 22:38:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-03-18 22:38:44,926 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 27 [2022-03-18 22:38:44,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:44,927 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-03-18 22:38:44,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 22:38:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-03-18 22:38:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 22:38:44,928 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:44,928 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:44,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 22:38:44,928 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:44,929 INFO L85 PathProgramCache]: Analyzing trace with hash -525796213, now seen corresponding path program 1 times [2022-03-18 22:38:44,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:44,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982702454] [2022-03-18 22:38:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:44,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:44,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:44,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:44,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 22:38:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:44,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:44,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982702454] [2022-03-18 22:38:44,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982702454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:38:44,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:38:44,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 22:38:44,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718545661] [2022-03-18 22:38:44,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:38:44,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 22:38:44,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:44,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 22:38:44,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 22:38:44,988 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:45,052 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-03-18 22:38:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 22:38:45,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-03-18 22:38:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:45,053 INFO L225 Difference]: With dead ends: 72 [2022-03-18 22:38:45,053 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 22:38:45,054 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 22:38:45,055 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:45,055 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:38:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 22:38:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-03-18 22:38:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 22:38:45,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-03-18 22:38:45,063 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 27 [2022-03-18 22:38:45,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:45,063 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-03-18 22:38:45,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-03-18 22:38:45,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 22:38:45,065 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:45,065 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:45,065 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 22:38:45,065 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:45,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:45,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1887910336, now seen corresponding path program 1 times [2022-03-18 22:38:45,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:45,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921711394] [2022-03-18 22:38:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:45,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:45,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:45,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:45,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 22:38:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:45,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:45,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921711394] [2022-03-18 22:38:45,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921711394] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:38:45,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096621745] [2022-03-18 22:38:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:45,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:45,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:38:45,130 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) [2022-03-18 22:38:45,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 22:38:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:45,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 22:38:45,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:38:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:38:45,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 22:38:45,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096621745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:38:45,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 22:38:45,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2022-03-18 22:38:45,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191581227] [2022-03-18 22:38:45,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:38:45,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 22:38:45,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:45,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 22:38:45,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-03-18 22:38:45,444 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:45,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:45,529 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-03-18 22:38:45,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 22:38:45,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-18 22:38:45,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:45,531 INFO L225 Difference]: With dead ends: 56 [2022-03-18 22:38:45,531 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 22:38:45,531 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-18 22:38:45,532 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:45,533 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 129 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:38:45,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 22:38:45,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-03-18 22:38:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 22:38:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-18 22:38:45,551 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2022-03-18 22:38:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:45,552 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-18 22:38:45,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-18 22:38:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 22:38:45,553 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:45,553 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:45,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 22:38:45,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:45,762 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:45,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1183994556, now seen corresponding path program 1 times [2022-03-18 22:38:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:45,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610719529] [2022-03-18 22:38:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:45,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:45,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:45,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 22:38:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:45,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:45,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610719529] [2022-03-18 22:38:45,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610719529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:38:45,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238477722] [2022-03-18 22:38:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:45,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:45,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:38:45,830 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) [2022-03-18 22:38:45,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 22:38:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:45,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 22:38:45,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:38:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:45,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:38:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:46,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238477722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:38:46,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:38:46,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-03-18 22:38:46,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370246691] [2022-03-18 22:38:46,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:38:46,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 22:38:46,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:46,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 22:38:46,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-18 22:38:46,057 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 22:38:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:46,155 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-03-18 22:38:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 22:38:46,155 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-03-18 22:38:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:46,156 INFO L225 Difference]: With dead ends: 74 [2022-03-18 22:38:46,156 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 22:38:46,157 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-18 22:38:46,157 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:46,158 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 38 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:38:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 22:38:46,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-03-18 22:38:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 22:38:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-03-18 22:38:46,164 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 29 [2022-03-18 22:38:46,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:46,164 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-03-18 22:38:46,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 22:38:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-03-18 22:38:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 22:38:46,165 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:46,166 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:46,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 22:38:46,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:46,388 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:46,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1942557629, now seen corresponding path program 2 times [2022-03-18 22:38:46,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:46,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899445938] [2022-03-18 22:38:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:46,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:46,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:46,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:46,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 22:38:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:38:46,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:46,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899445938] [2022-03-18 22:38:46,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899445938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:38:46,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:38:46,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 22:38:46,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497441001] [2022-03-18 22:38:46,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:38:46,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 22:38:46,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 22:38:46,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 22:38:46,543 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:46,694 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-03-18 22:38:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 22:38:46,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-18 22:38:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:46,696 INFO L225 Difference]: With dead ends: 53 [2022-03-18 22:38:46,696 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 22:38:46,696 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-18 22:38:46,697 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:46,697 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 52 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:38:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 22:38:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-18 22:38:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 22:38:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-03-18 22:38:46,704 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 31 [2022-03-18 22:38:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:46,704 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-03-18 22:38:46,704 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:46,704 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-03-18 22:38:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 22:38:46,705 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:46,705 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:46,706 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 22:38:46,706 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:46,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:46,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2136669557, now seen corresponding path program 1 times [2022-03-18 22:38:46,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:46,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138050447] [2022-03-18 22:38:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:46,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:46,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:46,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:46,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 22:38:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:38:46,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:46,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138050447] [2022-03-18 22:38:46,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138050447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:38:46,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537919803] [2022-03-18 22:38:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:46,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:46,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:38:46,779 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) [2022-03-18 22:38:46,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 22:38:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:46,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 22:38:46,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:38:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:38:46,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:38:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:38:46,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537919803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:38:46,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:38:46,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2022-03-18 22:38:46,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280257336] [2022-03-18 22:38:46,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:38:46,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 22:38:46,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 22:38:46,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-18 22:38:46,988 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 22:38:47,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:47,156 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-03-18 22:38:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 22:38:47,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-03-18 22:38:47,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:47,157 INFO L225 Difference]: With dead ends: 73 [2022-03-18 22:38:47,157 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 22:38:47,158 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-03-18 22:38:47,159 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:47,159 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:38:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 22:38:47,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-18 22:38:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 22:38:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-03-18 22:38:47,166 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2022-03-18 22:38:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:47,166 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-03-18 22:38:47,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 22:38:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-03-18 22:38:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 22:38:47,167 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:47,167 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:47,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 22:38:47,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:47,383 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:47,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1468224207, now seen corresponding path program 1 times [2022-03-18 22:38:47,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:47,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598356193] [2022-03-18 22:38:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:47,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:47,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:47,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:47,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 22:38:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:38:47,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:47,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598356193] [2022-03-18 22:38:47,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598356193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:38:47,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348951876] [2022-03-18 22:38:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:47,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:47,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:38:47,469 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) [2022-03-18 22:38:47,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 22:38:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:47,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 22:38:47,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:38:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:38:47,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:38:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:38:47,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348951876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:38:47,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:38:47,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-03-18 22:38:47,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292888438] [2022-03-18 22:38:47,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:38:47,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 22:38:47,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:47,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 22:38:47,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-18 22:38:47,704 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 22:38:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:47,867 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2022-03-18 22:38:47,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 22:38:47,868 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-03-18 22:38:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:47,870 INFO L225 Difference]: With dead ends: 65 [2022-03-18 22:38:47,870 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 22:38:47,871 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-03-18 22:38:47,872 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:47,872 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 46 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:38:47,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 22:38:47,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-03-18 22:38:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 22:38:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-03-18 22:38:47,886 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 37 [2022-03-18 22:38:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:47,886 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-03-18 22:38:47,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 22:38:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-03-18 22:38:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 22:38:47,887 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:47,887 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:47,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 22:38:48,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:48,104 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:48,104 INFO L85 PathProgramCache]: Analyzing trace with hash -339230256, now seen corresponding path program 1 times [2022-03-18 22:38:48,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:48,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982153804] [2022-03-18 22:38:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:48,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:48,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:48,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:48,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 22:38:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 22:38:48,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:48,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982153804] [2022-03-18 22:38:48,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982153804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:38:48,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:38:48,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 22:38:48,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779895803] [2022-03-18 22:38:48,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:38:48,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 22:38:48,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:48,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 22:38:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-18 22:38:48,214 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:48,513 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-03-18 22:38:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 22:38:48,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-03-18 22:38:48,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:48,514 INFO L225 Difference]: With dead ends: 60 [2022-03-18 22:38:48,514 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 22:38:48,514 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-03-18 22:38:48,515 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:48,515 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 69 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:38:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 22:38:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-03-18 22:38:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:38:48,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-03-18 22:38:48,521 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 37 [2022-03-18 22:38:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:48,522 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-03-18 22:38:48,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-03-18 22:38:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 22:38:48,523 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:48,523 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:48,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-18 22:38:48,523 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:48,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:48,523 INFO L85 PathProgramCache]: Analyzing trace with hash -26371531, now seen corresponding path program 2 times [2022-03-18 22:38:48,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:48,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411492504] [2022-03-18 22:38:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:48,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:48,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:48,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:48,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 22:38:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:48,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:48,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411492504] [2022-03-18 22:38:48,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411492504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:38:48,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330350919] [2022-03-18 22:38:48,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:38:48,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:48,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:38:48,684 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) [2022-03-18 22:38:48,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 22:38:48,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:38:48,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:38:48,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 22:38:48,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:38:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:48,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:38:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:49,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330350919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:38:49,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:38:49,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2022-03-18 22:38:49,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148532284] [2022-03-18 22:38:49,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:38:49,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 22:38:49,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:49,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 22:38:49,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-03-18 22:38:49,609 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:49,994 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-03-18 22:38:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 22:38:49,994 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-03-18 22:38:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:49,995 INFO L225 Difference]: With dead ends: 67 [2022-03-18 22:38:49,995 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 22:38:49,996 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 22:38:49,996 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:49,997 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 67 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:38:49,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 22:38:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-03-18 22:38:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:38:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-03-18 22:38:50,002 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 39 [2022-03-18 22:38:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:50,002 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-03-18 22:38:50,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-03-18 22:38:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 22:38:50,003 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:50,003 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:50,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 22:38:50,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 22:38:50,216 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:50,216 INFO L85 PathProgramCache]: Analyzing trace with hash -315628374, now seen corresponding path program 2 times [2022-03-18 22:38:50,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:50,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127843673] [2022-03-18 22:38:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:50,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:50,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:50,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:50,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 22:38:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:50,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:50,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127843673] [2022-03-18 22:38:50,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127843673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:38:50,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184682642] [2022-03-18 22:38:50,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:38:50,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:50,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:38:50,411 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) [2022-03-18 22:38:50,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 22:38:50,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:38:50,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:38:50,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 22:38:50,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:38:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:50,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:38:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:51,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184682642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:38:51,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:38:51,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2022-03-18 22:38:51,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913224939] [2022-03-18 22:38:51,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:38:51,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 22:38:51,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:51,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 22:38:51,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-03-18 22:38:51,177 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:51,559 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2022-03-18 22:38:51,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 22:38:51,560 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-03-18 22:38:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:51,560 INFO L225 Difference]: With dead ends: 61 [2022-03-18 22:38:51,560 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 22:38:51,561 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 22:38:51,562 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:51,562 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 75 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:38:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 22:38:51,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-18 22:38:51,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:38:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-03-18 22:38:51,567 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 39 [2022-03-18 22:38:51,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:51,568 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-03-18 22:38:51,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-03-18 22:38:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 22:38:51,568 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:51,569 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:51,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 22:38:51,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:51,784 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:51,784 INFO L85 PathProgramCache]: Analyzing trace with hash -627253872, now seen corresponding path program 3 times [2022-03-18 22:38:51,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:51,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069453559] [2022-03-18 22:38:51,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:51,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:51,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:51,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:51,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 22:38:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:51,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:51,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069453559] [2022-03-18 22:38:51,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069453559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:38:51,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014109732] [2022-03-18 22:38:51,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:38:51,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:51,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:38:51,996 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) [2022-03-18 22:38:52,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 22:38:52,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 22:38:52,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:38:52,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 22:38:52,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:38:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:52,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:38:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:53,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014109732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:38:53,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:38:53,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-03-18 22:38:53,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62767414] [2022-03-18 22:38:53,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:38:53,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 22:38:53,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:53,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 22:38:53,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 22:38:53,156 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:53,736 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2022-03-18 22:38:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 22:38:53,737 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-03-18 22:38:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:53,738 INFO L225 Difference]: With dead ends: 74 [2022-03-18 22:38:53,738 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 22:38:53,739 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=469, Invalid=2501, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 22:38:53,739 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:53,740 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 87 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:38:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 22:38:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2022-03-18 22:38:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:38:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-03-18 22:38:53,745 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 41 [2022-03-18 22:38:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:53,746 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-03-18 22:38:53,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-03-18 22:38:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 22:38:53,746 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:53,746 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:53,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 22:38:53,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:53,970 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:53,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:53,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1113193838, now seen corresponding path program 3 times [2022-03-18 22:38:53,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:53,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133465866] [2022-03-18 22:38:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:53,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:54,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:54,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:54,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 22:38:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:54,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:54,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133465866] [2022-03-18 22:38:54,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133465866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:38:54,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651937864] [2022-03-18 22:38:54,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:38:54,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:54,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:38:54,179 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) [2022-03-18 22:38:54,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 22:38:54,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 22:38:54,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:38:54,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 22:38:54,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:38:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:54,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:38:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:55,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651937864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:38:55,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:38:55,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-03-18 22:38:55,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779510130] [2022-03-18 22:38:55,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:38:55,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 22:38:55,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:55,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 22:38:55,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 22:38:55,115 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:55,645 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-03-18 22:38:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 22:38:55,646 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-03-18 22:38:55,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:55,647 INFO L225 Difference]: With dead ends: 69 [2022-03-18 22:38:55,647 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 22:38:55,648 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=469, Invalid=2501, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 22:38:55,650 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 112 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:55,650 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 80 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:38:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 22:38:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-03-18 22:38:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:38:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-03-18 22:38:55,657 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 41 [2022-03-18 22:38:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:55,657 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-03-18 22:38:55,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-03-18 22:38:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 22:38:55,657 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:55,658 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:55,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 22:38:55,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 22:38:55,880 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:55,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:55,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1908139756, now seen corresponding path program 4 times [2022-03-18 22:38:55,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:55,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246418502] [2022-03-18 22:38:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:55,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:55,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:55,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:55,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 22:38:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:56,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:56,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246418502] [2022-03-18 22:38:56,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246418502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:38:56,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70307071] [2022-03-18 22:38:56,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:38:56,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:56,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:38:56,071 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) [2022-03-18 22:38:56,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 22:38:56,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:38:56,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:38:56,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 22:38:56,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:38:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:56,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:38:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:56,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70307071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:38:56,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:38:56,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2022-03-18 22:38:56,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571258568] [2022-03-18 22:38:56,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:38:56,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 22:38:56,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:56,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 22:38:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 22:38:56,934 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:57,411 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2022-03-18 22:38:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 22:38:57,415 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-03-18 22:38:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:57,416 INFO L225 Difference]: With dead ends: 71 [2022-03-18 22:38:57,416 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 22:38:57,417 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 22:38:57,417 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:57,417 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 92 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:38:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 22:38:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-03-18 22:38:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:38:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-03-18 22:38:57,422 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 43 [2022-03-18 22:38:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:57,422 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-03-18 22:38:57,422 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-03-18 22:38:57,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 22:38:57,423 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:57,423 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:57,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 22:38:57,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 22:38:57,635 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:57,636 INFO L85 PathProgramCache]: Analyzing trace with hash -721594743, now seen corresponding path program 4 times [2022-03-18 22:38:57,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:57,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040715837] [2022-03-18 22:38:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:57,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:57,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:57,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:57,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 22:38:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:57,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:57,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040715837] [2022-03-18 22:38:57,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040715837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:38:57,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068887569] [2022-03-18 22:38:57,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:38:57,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:57,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:38:57,836 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) [2022-03-18 22:38:57,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 22:38:57,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:38:57,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:38:57,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 22:38:57,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:38:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:58,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:38:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:58,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068887569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:38:58,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:38:58,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2022-03-18 22:38:58,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713717433] [2022-03-18 22:38:58,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:38:58,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 22:38:58,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:38:58,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 22:38:58,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 22:38:58,638 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:38:59,077 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-03-18 22:38:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 22:38:59,077 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-03-18 22:38:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:38:59,078 INFO L225 Difference]: With dead ends: 65 [2022-03-18 22:38:59,078 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 22:38:59,079 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 22:38:59,079 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:38:59,079 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 90 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:38:59,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 22:38:59,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-18 22:38:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 44 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:38:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-03-18 22:38:59,084 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 43 [2022-03-18 22:38:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:38:59,084 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-03-18 22:38:59,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:38:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-03-18 22:38:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 22:38:59,085 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:38:59,085 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:38:59,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 22:38:59,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 22:38:59,299 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:38:59,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:38:59,300 INFO L85 PathProgramCache]: Analyzing trace with hash 81089455, now seen corresponding path program 5 times [2022-03-18 22:38:59,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:38:59,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705484952] [2022-03-18 22:38:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:38:59,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:38:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:59,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:38:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:59,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:38:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:59,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 22:38:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:38:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:59,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:38:59,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705484952] [2022-03-18 22:38:59,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705484952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:38:59,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866814310] [2022-03-18 22:38:59,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:38:59,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:38:59,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:38:59,528 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) [2022-03-18 22:38:59,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 22:38:59,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 22:38:59,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:38:59,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 22:38:59,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:38:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:38:59,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:00,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866814310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:00,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:00,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2022-03-18 22:39:00,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289081502] [2022-03-18 22:39:00,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:00,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 22:39:00,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 22:39:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 22:39:00,513 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:01,105 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2022-03-18 22:39:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 22:39:01,105 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-03-18 22:39:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:01,106 INFO L225 Difference]: With dead ends: 78 [2022-03-18 22:39:01,106 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 22:39:01,107 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=605, Invalid=3301, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 22:39:01,108 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:01,108 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 62 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 22:39:01,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-03-18 22:39:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-03-18 22:39:01,112 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 45 [2022-03-18 22:39:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:01,113 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-03-18 22:39:01,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:01,113 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-03-18 22:39:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 22:39:01,113 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:01,113 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:01,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:01,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 22:39:01,327 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:01,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1919563725, now seen corresponding path program 5 times [2022-03-18 22:39:01,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:01,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908867440] [2022-03-18 22:39:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:01,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:01,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:01,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:01,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 22:39:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:01,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:01,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908867440] [2022-03-18 22:39:01,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908867440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:01,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981914689] [2022-03-18 22:39:01,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:39:01,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:01,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:01,538 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) [2022-03-18 22:39:01,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 22:39:01,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 22:39:01,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:01,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 22:39:01,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:01,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:02,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981914689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:02,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:02,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2022-03-18 22:39:02,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975773419] [2022-03-18 22:39:02,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:02,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 22:39:02,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:02,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 22:39:02,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 22:39:02,506 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:03,168 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-03-18 22:39:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 22:39:03,169 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-03-18 22:39:03,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:03,170 INFO L225 Difference]: With dead ends: 73 [2022-03-18 22:39:03,170 INFO L226 Difference]: Without dead ends: 64 [2022-03-18 22:39:03,171 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=605, Invalid=3301, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 22:39:03,171 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 109 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:03,171 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 90 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:39:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-18 22:39:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-03-18 22:39:03,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-03-18 22:39:03,176 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 45 [2022-03-18 22:39:03,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:03,176 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-03-18 22:39:03,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:03,176 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-03-18 22:39:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 22:39:03,177 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:03,177 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:03,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:03,377 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 22:39:03,377 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:03,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:03,378 INFO L85 PathProgramCache]: Analyzing trace with hash -80791629, now seen corresponding path program 6 times [2022-03-18 22:39:03,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:03,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141082457] [2022-03-18 22:39:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:03,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:03,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:03,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:03,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 22:39:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:03,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:03,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141082457] [2022-03-18 22:39:03,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141082457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:03,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337283072] [2022-03-18 22:39:03,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:39:03,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:03,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:03,600 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) [2022-03-18 22:39:03,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 22:39:03,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-18 22:39:03,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:03,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 22:39:03,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:03,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:04,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337283072] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:04,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:04,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2022-03-18 22:39:04,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368678859] [2022-03-18 22:39:04,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:04,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 22:39:04,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:04,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 22:39:04,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 22:39:04,544 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:04,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:04,997 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-03-18 22:39:04,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 22:39:04,997 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-03-18 22:39:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:04,998 INFO L225 Difference]: With dead ends: 75 [2022-03-18 22:39:04,998 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 22:39:04,999 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 22:39:05,000 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:05,000 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 67 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:05,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 22:39:05,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-03-18 22:39:05,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-03-18 22:39:05,019 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 47 [2022-03-18 22:39:05,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:05,019 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-03-18 22:39:05,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-03-18 22:39:05,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 22:39:05,020 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:05,020 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:05,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:05,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 22:39:05,221 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:05,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:05,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2012129320, now seen corresponding path program 6 times [2022-03-18 22:39:05,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:05,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039211653] [2022-03-18 22:39:05,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:05,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:05,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:05,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:05,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 22:39:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:05,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:05,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039211653] [2022-03-18 22:39:05,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039211653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:05,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304985435] [2022-03-18 22:39:05,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:39:05,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:05,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:05,443 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) [2022-03-18 22:39:05,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 22:39:05,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-18 22:39:05,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:05,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 22:39:05,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:05,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:06,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304985435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:06,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:06,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2022-03-18 22:39:06,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500523475] [2022-03-18 22:39:06,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:06,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 22:39:06,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:06,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 22:39:06,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 22:39:06,289 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:06,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:06,831 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-03-18 22:39:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 22:39:06,831 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-03-18 22:39:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:06,832 INFO L225 Difference]: With dead ends: 69 [2022-03-18 22:39:06,832 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 22:39:06,833 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 22:39:06,834 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:06,834 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 100 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:39:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 22:39:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-18 22:39:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-03-18 22:39:06,842 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 47 [2022-03-18 22:39:06,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:06,842 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-03-18 22:39:06,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:06,842 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-03-18 22:39:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 22:39:06,842 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:06,843 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:06,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:07,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:07,043 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:07,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1330071154, now seen corresponding path program 7 times [2022-03-18 22:39:07,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:07,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576599753] [2022-03-18 22:39:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:07,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:07,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:07,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:07,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 22:39:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:07,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:07,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576599753] [2022-03-18 22:39:07,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576599753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:07,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271745411] [2022-03-18 22:39:07,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:39:07,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:07,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:07,309 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) [2022-03-18 22:39:07,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 22:39:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:07,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 22:39:07,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:07,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:08,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271745411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:08,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:08,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2022-03-18 22:39:08,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791442724] [2022-03-18 22:39:08,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:08,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 22:39:08,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:08,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 22:39:08,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 22:39:08,327 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:08,933 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-03-18 22:39:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 22:39:08,934 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-03-18 22:39:08,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:08,934 INFO L225 Difference]: With dead ends: 82 [2022-03-18 22:39:08,934 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 22:39:08,936 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2022-03-18 22:39:08,936 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:08,936 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 97 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 22:39:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-03-18 22:39:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-03-18 22:39:08,958 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 49 [2022-03-18 22:39:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:08,958 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-03-18 22:39:08,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-03-18 22:39:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 22:39:08,959 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:08,959 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:08,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:09,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:09,172 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash 222646764, now seen corresponding path program 7 times [2022-03-18 22:39:09,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:09,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675674926] [2022-03-18 22:39:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:09,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:09,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:09,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:09,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 22:39:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:09,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:09,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675674926] [2022-03-18 22:39:09,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675674926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:09,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394437991] [2022-03-18 22:39:09,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:39:09,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:09,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:09,436 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) [2022-03-18 22:39:09,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 22:39:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:09,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 22:39:09,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:09,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:10,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394437991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:10,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:10,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2022-03-18 22:39:10,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296464204] [2022-03-18 22:39:10,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:10,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 22:39:10,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:10,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 22:39:10,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 22:39:10,488 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:11,097 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2022-03-18 22:39:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 22:39:11,097 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-03-18 22:39:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:11,097 INFO L225 Difference]: With dead ends: 77 [2022-03-18 22:39:11,098 INFO L226 Difference]: Without dead ends: 68 [2022-03-18 22:39:11,099 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2022-03-18 22:39:11,099 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 146 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:11,099 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 80 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:11,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-18 22:39:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-03-18 22:39:11,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-03-18 22:39:11,106 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 49 [2022-03-18 22:39:11,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:11,106 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-03-18 22:39:11,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-03-18 22:39:11,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 22:39:11,107 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:11,107 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:11,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:11,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:11,315 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:11,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:11,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1269581330, now seen corresponding path program 8 times [2022-03-18 22:39:11,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:11,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224818094] [2022-03-18 22:39:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:11,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:11,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:11,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 22:39:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:11,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:11,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224818094] [2022-03-18 22:39:11,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224818094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:11,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728618833] [2022-03-18 22:39:11,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:39:11,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:11,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:11,550 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) [2022-03-18 22:39:11,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 22:39:11,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:39:11,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:11,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 22:39:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:11,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:12,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728618833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:12,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:12,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2022-03-18 22:39:12,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728676532] [2022-03-18 22:39:12,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:12,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 22:39:12,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:12,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 22:39:12,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 22:39:12,480 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:12,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:12,992 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2022-03-18 22:39:12,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 22:39:12,995 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-03-18 22:39:12,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:12,996 INFO L225 Difference]: With dead ends: 79 [2022-03-18 22:39:12,996 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 22:39:12,997 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 22:39:12,997 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 92 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:12,997 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 87 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 22:39:13,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2022-03-18 22:39:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:13,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-03-18 22:39:13,003 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 51 [2022-03-18 22:39:13,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:13,003 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-03-18 22:39:13,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-03-18 22:39:13,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 22:39:13,004 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:13,004 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:13,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:13,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:13,228 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1783551609, now seen corresponding path program 8 times [2022-03-18 22:39:13,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:13,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958564650] [2022-03-18 22:39:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:13,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:13,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:13,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:13,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 22:39:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:13,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:13,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958564650] [2022-03-18 22:39:13,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958564650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:13,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846659204] [2022-03-18 22:39:13,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:39:13,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:13,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:13,459 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) [2022-03-18 22:39:13,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 22:39:13,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:39:13,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:13,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 22:39:13,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:13,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:14,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846659204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:14,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:14,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2022-03-18 22:39:14,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158141890] [2022-03-18 22:39:14,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:14,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 22:39:14,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:14,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 22:39:14,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 22:39:14,349 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:14,825 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2022-03-18 22:39:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 22:39:14,825 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-03-18 22:39:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:14,826 INFO L225 Difference]: With dead ends: 73 [2022-03-18 22:39:14,826 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 22:39:14,826 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 22:39:14,827 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:14,827 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 85 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 22:39:14,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-18 22:39:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-03-18 22:39:14,835 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 51 [2022-03-18 22:39:14,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:14,835 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-03-18 22:39:14,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:14,835 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-03-18 22:39:14,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 22:39:14,836 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:14,836 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:14,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:15,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:15,044 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:15,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1742757677, now seen corresponding path program 9 times [2022-03-18 22:39:15,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:15,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472052168] [2022-03-18 22:39:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:15,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:15,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:15,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:15,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 22:39:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:15,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:15,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472052168] [2022-03-18 22:39:15,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472052168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:15,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996910920] [2022-03-18 22:39:15,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:39:15,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:15,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:15,326 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) [2022-03-18 22:39:15,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 22:39:15,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-18 22:39:15,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:15,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 22:39:15,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:15,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:16,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996910920] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:16,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:16,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2022-03-18 22:39:16,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023032066] [2022-03-18 22:39:16,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:16,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 22:39:16,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:16,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 22:39:16,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 22:39:16,449 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:17,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:17,083 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-03-18 22:39:17,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 22:39:17,083 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-03-18 22:39:17,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:17,084 INFO L225 Difference]: With dead ends: 86 [2022-03-18 22:39:17,084 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 22:39:17,085 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=937, Invalid=5225, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 22:39:17,085 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:17,085 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 87 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:17,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 22:39:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2022-03-18 22:39:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-03-18 22:39:17,091 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 53 [2022-03-18 22:39:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:17,091 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-03-18 22:39:17,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:17,091 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-03-18 22:39:17,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 22:39:17,092 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:17,092 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:17,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:17,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:17,299 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:17,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:17,300 INFO L85 PathProgramCache]: Analyzing trace with hash -733439029, now seen corresponding path program 9 times [2022-03-18 22:39:17,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:17,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087942110] [2022-03-18 22:39:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:17,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:17,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:17,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:17,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 22:39:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:17,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:17,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087942110] [2022-03-18 22:39:17,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087942110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:17,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890033205] [2022-03-18 22:39:17,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:39:17,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:17,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:17,574 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) [2022-03-18 22:39:17,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 22:39:17,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-18 22:39:17,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:17,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 22:39:17,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:18,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:18,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890033205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:18,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:18,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2022-03-18 22:39:18,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526184705] [2022-03-18 22:39:18,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:18,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 22:39:18,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:18,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 22:39:18,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 22:39:18,685 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:19,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:19,308 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-03-18 22:39:19,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 22:39:19,309 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-03-18 22:39:19,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:19,309 INFO L225 Difference]: With dead ends: 81 [2022-03-18 22:39:19,309 INFO L226 Difference]: Without dead ends: 72 [2022-03-18 22:39:19,310 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=937, Invalid=5225, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 22:39:19,310 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 133 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:19,311 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 95 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-18 22:39:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-03-18 22:39:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-03-18 22:39:19,315 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 53 [2022-03-18 22:39:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:19,315 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-03-18 22:39:19,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:19,316 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-03-18 22:39:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 22:39:19,316 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:19,316 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:19,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:19,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-18 22:39:19,517 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:19,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1594135601, now seen corresponding path program 10 times [2022-03-18 22:39:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:19,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17574277] [2022-03-18 22:39:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:19,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:19,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:19,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:19,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 22:39:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:19,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:19,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17574277] [2022-03-18 22:39:19,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17574277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:19,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792489749] [2022-03-18 22:39:19,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:39:19,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:19,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:19,788 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) [2022-03-18 22:39:19,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 22:39:19,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:39:19,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:19,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 22:39:19,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:20,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:20,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792489749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:20,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:20,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2022-03-18 22:39:20,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308254759] [2022-03-18 22:39:20,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:20,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-18 22:39:20,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:20,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-18 22:39:20,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 22:39:20,844 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:21,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:21,393 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-03-18 22:39:21,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 22:39:21,394 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-18 22:39:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:21,394 INFO L225 Difference]: With dead ends: 83 [2022-03-18 22:39:21,394 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 22:39:21,395 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=913, Invalid=4787, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 22:39:21,396 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:21,396 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 87 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:21,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 22:39:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-03-18 22:39:21,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 57 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-03-18 22:39:21,402 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 55 [2022-03-18 22:39:21,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:21,402 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-03-18 22:39:21,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-03-18 22:39:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 22:39:21,403 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:21,403 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:21,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:21,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-18 22:39:21,615 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash 985541286, now seen corresponding path program 10 times [2022-03-18 22:39:21,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:21,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154998054] [2022-03-18 22:39:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:21,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:21,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:21,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:21,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 22:39:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:21,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:21,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154998054] [2022-03-18 22:39:21,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154998054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:21,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729058588] [2022-03-18 22:39:21,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:39:21,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:21,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:21,876 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) [2022-03-18 22:39:21,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 22:39:21,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:39:21,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:21,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 22:39:21,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:22,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:22,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729058588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:22,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:22,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2022-03-18 22:39:22,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223192439] [2022-03-18 22:39:22,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:22,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-18 22:39:22,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:22,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-18 22:39:22,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 22:39:22,870 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:23,382 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-03-18 22:39:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 22:39:23,383 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-18 22:39:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:23,383 INFO L225 Difference]: With dead ends: 77 [2022-03-18 22:39:23,383 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 22:39:23,385 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=913, Invalid=4787, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 22:39:23,385 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 107 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:23,385 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 95 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:23,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 22:39:23,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-03-18 22:39:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 56 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-03-18 22:39:23,391 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 55 [2022-03-18 22:39:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:23,392 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-03-18 22:39:23,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-03-18 22:39:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 22:39:23,392 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:23,392 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:23,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:23,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-18 22:39:23,615 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash -38693748, now seen corresponding path program 11 times [2022-03-18 22:39:23,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:23,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017383334] [2022-03-18 22:39:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:23,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:23,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:23,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:23,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 22:39:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:23,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:23,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017383334] [2022-03-18 22:39:23,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017383334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:23,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65798593] [2022-03-18 22:39:23,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:39:23,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:23,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:23,875 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) [2022-03-18 22:39:23,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 22:39:23,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-18 22:39:23,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:23,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 22:39:23,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:24,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:25,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65798593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:25,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:25,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2022-03-18 22:39:25,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670885354] [2022-03-18 22:39:25,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:25,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-18 22:39:25,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:25,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-18 22:39:25,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 22:39:25,113 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:25,825 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-03-18 22:39:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 22:39:25,825 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-03-18 22:39:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:25,826 INFO L225 Difference]: With dead ends: 90 [2022-03-18 22:39:25,826 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 22:39:25,827 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3000 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1133, Invalid=6349, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 22:39:25,828 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 173 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:25,828 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 82 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:25,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 22:39:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-03-18 22:39:25,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-03-18 22:39:25,834 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 57 [2022-03-18 22:39:25,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:25,834 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-03-18 22:39:25,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:25,835 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-03-18 22:39:25,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 22:39:25,835 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:25,835 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:25,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-18 22:39:26,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:26,055 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -241343126, now seen corresponding path program 11 times [2022-03-18 22:39:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:26,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731409345] [2022-03-18 22:39:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:26,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:26,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:26,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:26,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 22:39:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:26,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:26,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731409345] [2022-03-18 22:39:26,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731409345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:26,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323511246] [2022-03-18 22:39:26,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:39:26,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:26,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:26,412 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) [2022-03-18 22:39:26,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 22:39:26,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-18 22:39:26,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:26,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 22:39:26,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:26,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:27,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323511246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:27,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:27,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2022-03-18 22:39:27,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506567048] [2022-03-18 22:39:27,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:27,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-18 22:39:27,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:27,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-18 22:39:27,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 22:39:27,697 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:28,409 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2022-03-18 22:39:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 22:39:28,410 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-03-18 22:39:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:28,410 INFO L225 Difference]: With dead ends: 85 [2022-03-18 22:39:28,410 INFO L226 Difference]: Without dead ends: 76 [2022-03-18 22:39:28,411 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3008 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1133, Invalid=6349, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 22:39:28,412 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:28,412 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 90 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:39:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-18 22:39:28,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-03-18 22:39:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.1) internal successors, (66), 62 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-03-18 22:39:28,419 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 57 [2022-03-18 22:39:28,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:28,419 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-03-18 22:39:28,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:28,419 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-03-18 22:39:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 22:39:28,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:28,420 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:28,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-18 22:39:28,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 22:39:28,635 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:28,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2051895824, now seen corresponding path program 12 times [2022-03-18 22:39:28,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:28,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172934643] [2022-03-18 22:39:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:28,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:28,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:28,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:28,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 22:39:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:28,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:28,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172934643] [2022-03-18 22:39:28,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172934643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:28,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759376377] [2022-03-18 22:39:28,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:39:28,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:28,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:28,944 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) [2022-03-18 22:39:28,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 22:39:29,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-18 22:39:29,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:29,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 22:39:29,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:29,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:30,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759376377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:30,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:30,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2022-03-18 22:39:30,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913394721] [2022-03-18 22:39:30,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:30,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-18 22:39:30,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:30,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-18 22:39:30,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 22:39:30,191 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:30,787 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2022-03-18 22:39:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 22:39:30,788 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-03-18 22:39:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:30,788 INFO L225 Difference]: With dead ends: 87 [2022-03-18 22:39:30,788 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 22:39:30,789 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2919 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1111, Invalid=5861, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 22:39:30,790 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:30,790 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 77 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 22:39:30,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-03-18 22:39:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:30,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-03-18 22:39:30,795 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 59 [2022-03-18 22:39:30,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:30,795 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-03-18 22:39:30,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-03-18 22:39:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 22:39:30,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:30,796 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:30,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-18 22:39:31,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:31,006 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:31,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:31,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1297808261, now seen corresponding path program 12 times [2022-03-18 22:39:31,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:31,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139520001] [2022-03-18 22:39:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:31,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:31,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:31,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:31,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 22:39:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:31,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:31,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139520001] [2022-03-18 22:39:31,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139520001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:31,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474440342] [2022-03-18 22:39:31,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:39:31,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:31,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:31,327 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) [2022-03-18 22:39:31,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 22:39:31,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-18 22:39:31,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:31,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 22:39:31,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:31,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:32,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474440342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:32,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:32,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2022-03-18 22:39:32,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254405026] [2022-03-18 22:39:32,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:32,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-18 22:39:32,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-18 22:39:32,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 22:39:32,516 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:33,149 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2022-03-18 22:39:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 22:39:33,149 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-03-18 22:39:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:33,150 INFO L225 Difference]: With dead ends: 81 [2022-03-18 22:39:33,150 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 22:39:33,151 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2872 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1111, Invalid=5861, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 22:39:33,151 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 122 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:33,152 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 85 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:39:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 22:39:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-03-18 22:39:33,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 60 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-03-18 22:39:33,159 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 59 [2022-03-18 22:39:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:33,159 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-03-18 22:39:33,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-03-18 22:39:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 22:39:33,160 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:33,160 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:33,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-18 22:39:33,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-18 22:39:33,368 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:33,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:33,368 INFO L85 PathProgramCache]: Analyzing trace with hash -597841493, now seen corresponding path program 13 times [2022-03-18 22:39:33,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:33,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953493220] [2022-03-18 22:39:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:33,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:33,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:33,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:33,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 22:39:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:33,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:33,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953493220] [2022-03-18 22:39:33,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953493220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:33,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538697433] [2022-03-18 22:39:33,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:39:33,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:33,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:33,686 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:39:33,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 22:39:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:33,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 22:39:33,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:34,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:35,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538697433] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:35,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:35,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2022-03-18 22:39:35,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865949827] [2022-03-18 22:39:35,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:35,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-18 22:39:35,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:35,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-18 22:39:35,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 22:39:35,084 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:35,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:35,844 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-03-18 22:39:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 22:39:35,845 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-03-18 22:39:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:35,845 INFO L225 Difference]: With dead ends: 94 [2022-03-18 22:39:35,845 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 22:39:35,846 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3671 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1349, Invalid=7581, Unknown=0, NotChecked=0, Total=8930 [2022-03-18 22:39:35,847 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 186 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:35,847 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 82 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:39:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 22:39:35,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2022-03-18 22:39:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:35,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-03-18 22:39:35,854 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 61 [2022-03-18 22:39:35,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:35,854 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-03-18 22:39:35,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-03-18 22:39:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 22:39:35,856 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:35,856 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:35,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-18 22:39:36,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:36,071 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2059862327, now seen corresponding path program 13 times [2022-03-18 22:39:36,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:36,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442123682] [2022-03-18 22:39:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:36,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:36,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:36,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:36,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 22:39:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:36,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:36,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442123682] [2022-03-18 22:39:36,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442123682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:36,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125007932] [2022-03-18 22:39:36,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:39:36,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:36,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:36,446 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:39:36,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 22:39:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:36,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 22:39:36,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:37,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:37,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125007932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:37,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:37,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2022-03-18 22:39:37,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193236199] [2022-03-18 22:39:37,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:37,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-18 22:39:37,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-18 22:39:37,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 22:39:37,832 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:38,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:38,533 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-03-18 22:39:38,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 22:39:38,533 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-03-18 22:39:38,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:38,534 INFO L225 Difference]: With dead ends: 89 [2022-03-18 22:39:38,534 INFO L226 Difference]: Without dead ends: 80 [2022-03-18 22:39:38,535 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3680 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1349, Invalid=7581, Unknown=0, NotChecked=0, Total=8930 [2022-03-18 22:39:38,535 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 140 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:38,535 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 75 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-18 22:39:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-03-18 22:39:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.09375) internal successors, (70), 66 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-03-18 22:39:38,541 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 61 [2022-03-18 22:39:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:38,541 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-03-18 22:39:38,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-03-18 22:39:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 22:39:38,542 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:38,542 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:38,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:38,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:38,743 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:38,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:38,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1788334161, now seen corresponding path program 14 times [2022-03-18 22:39:38,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:38,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866310734] [2022-03-18 22:39:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:38,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:38,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:38,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:38,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 22:39:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:39,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:39,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866310734] [2022-03-18 22:39:39,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866310734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:39,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51193288] [2022-03-18 22:39:39,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:39:39,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:39,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:39,098 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:39:39,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 22:39:39,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:39:39,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:39,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 22:39:39,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:39,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:40,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51193288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:40,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:40,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2022-03-18 22:39:40,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071521138] [2022-03-18 22:39:40,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:40,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-18 22:39:40,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:40,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-18 22:39:40,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 22:39:40,399 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:41,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:41,185 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2022-03-18 22:39:41,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 22:39:41,186 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-03-18 22:39:41,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:41,186 INFO L225 Difference]: With dead ends: 91 [2022-03-18 22:39:41,186 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 22:39:41,188 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3580 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1329, Invalid=7043, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 22:39:41,188 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:41,188 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 87 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:39:41,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 22:39:41,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2022-03-18 22:39:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-03-18 22:39:41,195 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 63 [2022-03-18 22:39:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:41,195 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-03-18 22:39:41,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-03-18 22:39:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 22:39:41,196 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:41,196 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:41,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:41,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:41,397 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:41,397 INFO L85 PathProgramCache]: Analyzing trace with hash -627512284, now seen corresponding path program 14 times [2022-03-18 22:39:41,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:41,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844549046] [2022-03-18 22:39:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:41,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:41,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:41,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:41,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 22:39:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:41,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:41,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844549046] [2022-03-18 22:39:41,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844549046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:41,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979457529] [2022-03-18 22:39:41,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:39:41,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:41,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:41,783 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:39:41,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 22:39:41,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:39:41,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:41,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 22:39:41,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:42,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:43,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979457529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:43,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:43,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2022-03-18 22:39:43,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98658203] [2022-03-18 22:39:43,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:43,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-18 22:39:43,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:43,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-18 22:39:43,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 22:39:43,115 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:43,707 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2022-03-18 22:39:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 22:39:43,707 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-03-18 22:39:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:43,708 INFO L225 Difference]: With dead ends: 85 [2022-03-18 22:39:43,708 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 22:39:43,709 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3527 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1329, Invalid=7043, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 22:39:43,709 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:43,709 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 70 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 22:39:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-03-18 22:39:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.064516129032258) internal successors, (66), 64 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-03-18 22:39:43,724 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 63 [2022-03-18 22:39:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:43,725 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-03-18 22:39:43,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-03-18 22:39:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 22:39:43,725 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:43,726 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:43,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-18 22:39:43,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-18 22:39:43,931 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:43,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:43,932 INFO L85 PathProgramCache]: Analyzing trace with hash 300019338, now seen corresponding path program 15 times [2022-03-18 22:39:43,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:43,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392840268] [2022-03-18 22:39:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:43,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:43,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:43,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:44,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 22:39:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:44,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:44,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392840268] [2022-03-18 22:39:44,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392840268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:44,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547024449] [2022-03-18 22:39:44,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:39:44,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:44,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:44,300 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:39:44,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 22:39:44,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-18 22:39:44,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:44,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 22:39:44,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:44,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:45,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547024449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:45,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:45,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2022-03-18 22:39:45,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327232270] [2022-03-18 22:39:45,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:45,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-18 22:39:45,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:45,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-18 22:39:45,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 22:39:45,833 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:46,716 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-03-18 22:39:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 22:39:46,716 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-03-18 22:39:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:46,717 INFO L225 Difference]: With dead ends: 98 [2022-03-18 22:39:46,717 INFO L226 Difference]: Without dead ends: 87 [2022-03-18 22:39:46,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1585, Invalid=8921, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 22:39:46,718 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 193 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:46,718 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 77 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:39:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-18 22:39:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2022-03-18 22:39:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:46,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-03-18 22:39:46,726 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 65 [2022-03-18 22:39:46,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:46,726 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-03-18 22:39:46,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-03-18 22:39:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 22:39:46,727 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:46,727 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:46,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:46,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-18 22:39:46,935 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash -237193240, now seen corresponding path program 15 times [2022-03-18 22:39:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:46,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790989230] [2022-03-18 22:39:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:46,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:46,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:47,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 22:39:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:47,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:47,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790989230] [2022-03-18 22:39:47,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790989230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:47,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18405711] [2022-03-18 22:39:47,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:39:47,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:47,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:47,352 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:39:47,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 22:39:47,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-18 22:39:47,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:47,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 22:39:47,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:47,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:48,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18405711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:48,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:48,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2022-03-18 22:39:48,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284335044] [2022-03-18 22:39:48,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:48,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-18 22:39:48,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:48,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-18 22:39:48,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 22:39:48,904 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:49,694 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-03-18 22:39:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 22:39:49,695 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-03-18 22:39:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:49,695 INFO L225 Difference]: With dead ends: 93 [2022-03-18 22:39:49,695 INFO L226 Difference]: Without dead ends: 84 [2022-03-18 22:39:49,696 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4419 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1585, Invalid=8921, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 22:39:49,696 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 149 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:49,696 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 75 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-18 22:39:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-03-18 22:39:49,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.088235294117647) internal successors, (74), 70 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-03-18 22:39:49,704 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 65 [2022-03-18 22:39:49,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:49,705 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-03-18 22:39:49,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-03-18 22:39:49,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 22:39:49,705 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:49,706 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:49,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-18 22:39:49,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:49,919 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:49,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1744968974, now seen corresponding path program 16 times [2022-03-18 22:39:49,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:49,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985566911] [2022-03-18 22:39:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:49,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:49,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:49,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:50,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 22:39:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:50,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:50,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985566911] [2022-03-18 22:39:50,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985566911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:50,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164437649] [2022-03-18 22:39:50,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:39:50,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:50,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:50,305 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:39:50,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 22:39:50,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:39:50,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:50,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 22:39:50,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:50,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:51,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164437649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:51,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:51,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2022-03-18 22:39:51,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258413335] [2022-03-18 22:39:51,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:51,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-18 22:39:51,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:51,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-18 22:39:51,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 22:39:51,814 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:52,615 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2022-03-18 22:39:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 22:39:52,615 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-03-18 22:39:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:52,616 INFO L225 Difference]: With dead ends: 95 [2022-03-18 22:39:52,616 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 22:39:52,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4308 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1567, Invalid=8333, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 22:39:52,618 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 111 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:52,618 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 117 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:39:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 22:39:52,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2022-03-18 22:39:52,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 69 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-03-18 22:39:52,625 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 67 [2022-03-18 22:39:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:52,626 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-03-18 22:39:52,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-03-18 22:39:52,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 22:39:52,626 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:52,627 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:52,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:52,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-18 22:39:52,839 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:52,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:52,840 INFO L85 PathProgramCache]: Analyzing trace with hash 592792707, now seen corresponding path program 16 times [2022-03-18 22:39:52,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:52,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806188472] [2022-03-18 22:39:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:52,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:52,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:52,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:53,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 22:39:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:53,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:53,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806188472] [2022-03-18 22:39:53,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806188472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:53,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841521663] [2022-03-18 22:39:53,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:39:53,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:53,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:53,257 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:39:53,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 22:39:53,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:39:53,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:53,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 22:39:53,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:53,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:54,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841521663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:54,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:54,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2022-03-18 22:39:54,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573816984] [2022-03-18 22:39:54,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:54,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-18 22:39:54,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:54,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-18 22:39:54,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 22:39:54,595 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:55,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:55,350 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-03-18 22:39:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 22:39:55,350 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-03-18 22:39:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:55,351 INFO L225 Difference]: With dead ends: 89 [2022-03-18 22:39:55,351 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 22:39:55,352 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4249 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1567, Invalid=8333, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 22:39:55,353 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:55,353 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 95 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:39:55,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 22:39:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-18 22:39:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 68 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-03-18 22:39:55,377 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 67 [2022-03-18 22:39:55,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:55,377 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-03-18 22:39:55,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-03-18 22:39:55,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 22:39:55,378 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:55,378 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:55,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:55,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-18 22:39:55,601 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:55,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:55,602 INFO L85 PathProgramCache]: Analyzing trace with hash 487043881, now seen corresponding path program 17 times [2022-03-18 22:39:55,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:55,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450088451] [2022-03-18 22:39:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:55,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:55,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:55,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:55,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 22:39:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:56,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:56,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450088451] [2022-03-18 22:39:56,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450088451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:56,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691145275] [2022-03-18 22:39:56,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:39:56,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:56,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:56,013 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:39:56,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 22:39:56,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-18 22:39:56,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:56,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 22:39:56,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:56,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:57,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691145275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:57,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:57,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2022-03-18 22:39:57,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152766542] [2022-03-18 22:39:57,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:57,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-18 22:39:57,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-18 22:39:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 22:39:57,664 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:39:58,521 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-03-18 22:39:58,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 22:39:58,522 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-03-18 22:39:58,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:39:58,522 INFO L225 Difference]: With dead ends: 102 [2022-03-18 22:39:58,522 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 22:39:58,523 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5214 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1841, Invalid=10369, Unknown=0, NotChecked=0, Total=12210 [2022-03-18 22:39:58,524 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:39:58,524 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 77 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:39:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 22:39:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2022-03-18 22:39:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 71 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:39:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-03-18 22:39:58,533 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 69 [2022-03-18 22:39:58,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:39:58,533 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-03-18 22:39:58,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:39:58,533 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-03-18 22:39:58,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 22:39:58,534 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:39:58,534 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:39:58,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-18 22:39:58,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-18 22:39:58,747 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:39:58,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:39:58,748 INFO L85 PathProgramCache]: Analyzing trace with hash -367664953, now seen corresponding path program 17 times [2022-03-18 22:39:58,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:39:58,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217930696] [2022-03-18 22:39:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:39:58,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:39:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:58,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:39:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:58,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:39:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:58,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 22:39:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:39:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:59,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:39:59,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217930696] [2022-03-18 22:39:59,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217930696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:39:59,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642563387] [2022-03-18 22:39:59,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:39:59,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:39:59,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:39:59,141 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:39:59,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 22:39:59,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-18 22:39:59,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:39:59,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 22:39:59,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:39:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:39:59,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:00,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642563387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:00,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:00,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2022-03-18 22:40:00,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456487464] [2022-03-18 22:40:00,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:00,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-18 22:40:00,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:00,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-18 22:40:00,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 22:40:00,770 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:01,686 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2022-03-18 22:40:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 22:40:01,687 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-03-18 22:40:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:01,688 INFO L225 Difference]: With dead ends: 97 [2022-03-18 22:40:01,688 INFO L226 Difference]: Without dead ends: 88 [2022-03-18 22:40:01,689 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5225 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1841, Invalid=10369, Unknown=0, NotChecked=0, Total=12210 [2022-03-18 22:40:01,689 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:01,689 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 85 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:40:01,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-18 22:40:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-03-18 22:40:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 74 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:01,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2022-03-18 22:40:01,698 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 69 [2022-03-18 22:40:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:01,698 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2022-03-18 22:40:01,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:01,699 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2022-03-18 22:40:01,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 22:40:01,699 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:01,699 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:01,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-18 22:40:01,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:01,900 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:01,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:01,900 INFO L85 PathProgramCache]: Analyzing trace with hash 915704365, now seen corresponding path program 18 times [2022-03-18 22:40:01,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:01,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56195330] [2022-03-18 22:40:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:01,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:01,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:01,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:02,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 22:40:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:02,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:02,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56195330] [2022-03-18 22:40:02,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56195330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:02,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546492976] [2022-03-18 22:40:02,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:40:02,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:02,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:02,293 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:02,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 22:40:02,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-18 22:40:02,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 22:40:02,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:02,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:03,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546492976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:03,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:03,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2022-03-18 22:40:03,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413773922] [2022-03-18 22:40:03,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:03,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-18 22:40:03,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:03,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-18 22:40:03,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 22:40:03,886 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:04,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:04,680 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-03-18 22:40:04,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 22:40:04,681 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-03-18 22:40:04,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:04,681 INFO L225 Difference]: With dead ends: 99 [2022-03-18 22:40:04,681 INFO L226 Difference]: Without dead ends: 87 [2022-03-18 22:40:04,683 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5103 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1825, Invalid=9731, Unknown=0, NotChecked=0, Total=11556 [2022-03-18 22:40:04,683 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 147 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:04,683 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 82 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:40:04,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-18 22:40:04,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2022-03-18 22:40:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 73 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-03-18 22:40:04,692 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 71 [2022-03-18 22:40:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:04,693 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-03-18 22:40:04,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-03-18 22:40:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 22:40:04,693 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:04,694 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:04,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-18 22:40:04,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:04,915 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1765371042, now seen corresponding path program 18 times [2022-03-18 22:40:04,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:04,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835630941] [2022-03-18 22:40:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:04,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:04,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:04,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:05,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 22:40:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:05,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:05,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835630941] [2022-03-18 22:40:05,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835630941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:05,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466893256] [2022-03-18 22:40:05,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:40:05,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:05,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:05,307 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:05,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-18 22:40:05,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-18 22:40:05,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:05,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 22:40:05,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:05,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:06,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466893256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:06,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:06,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2022-03-18 22:40:06,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440165947] [2022-03-18 22:40:06,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:06,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-18 22:40:06,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:06,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-18 22:40:06,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 22:40:06,811 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:07,547 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2022-03-18 22:40:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 22:40:07,547 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-03-18 22:40:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:07,548 INFO L225 Difference]: With dead ends: 93 [2022-03-18 22:40:07,548 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 22:40:07,549 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5038 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1825, Invalid=9731, Unknown=0, NotChecked=0, Total=11556 [2022-03-18 22:40:07,550 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 120 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:07,550 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 90 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:40:07,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 22:40:07,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-03-18 22:40:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 72 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-03-18 22:40:07,557 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 71 [2022-03-18 22:40:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:07,557 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-03-18 22:40:07,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-03-18 22:40:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 22:40:07,558 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:07,558 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:07,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-18 22:40:07,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-18 22:40:07,781 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:07,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2053392264, now seen corresponding path program 19 times [2022-03-18 22:40:07,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:07,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134554026] [2022-03-18 22:40:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:07,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:07,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:07,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:08,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 22:40:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:08,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:08,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134554026] [2022-03-18 22:40:08,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134554026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:08,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644704463] [2022-03-18 22:40:08,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:40:08,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:08,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:08,224 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:08,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-18 22:40:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:08,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 22:40:08,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:09,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:10,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644704463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:10,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:10,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2022-03-18 22:40:10,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701817817] [2022-03-18 22:40:10,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:10,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-18 22:40:10,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:10,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-18 22:40:10,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 22:40:10,054 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:11,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:11,168 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-03-18 22:40:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 22:40:11,169 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-03-18 22:40:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:11,169 INFO L225 Difference]: With dead ends: 106 [2022-03-18 22:40:11,170 INFO L226 Difference]: Without dead ends: 95 [2022-03-18 22:40:11,171 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6086 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2117, Invalid=11925, Unknown=0, NotChecked=0, Total=14042 [2022-03-18 22:40:11,171 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:11,171 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 132 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:40:11,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-18 22:40:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-03-18 22:40:11,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 75 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-03-18 22:40:11,181 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 73 [2022-03-18 22:40:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:11,182 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-03-18 22:40:11,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-03-18 22:40:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 22:40:11,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:11,182 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:11,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-18 22:40:11,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-18 22:40:11,406 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:11,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:11,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1027459430, now seen corresponding path program 19 times [2022-03-18 22:40:11,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:11,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917165033] [2022-03-18 22:40:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:11,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:11,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:11,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:11,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 22:40:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:11,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:11,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917165033] [2022-03-18 22:40:11,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917165033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:11,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189839183] [2022-03-18 22:40:11,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:40:11,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:11,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:11,924 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:11,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-18 22:40:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:12,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 22:40:12,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:12,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:13,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189839183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:13,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:13,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2022-03-18 22:40:13,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881563722] [2022-03-18 22:40:13,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:13,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-18 22:40:13,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-18 22:40:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 22:40:13,697 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:14,662 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2022-03-18 22:40:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 22:40:14,662 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-03-18 22:40:14,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:14,663 INFO L225 Difference]: With dead ends: 101 [2022-03-18 22:40:14,663 INFO L226 Difference]: Without dead ends: 92 [2022-03-18 22:40:14,663 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6098 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2117, Invalid=11925, Unknown=0, NotChecked=0, Total=14042 [2022-03-18 22:40:14,664 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:14,664 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 95 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:40:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-18 22:40:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-03-18 22:40:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 78 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-03-18 22:40:14,673 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 73 [2022-03-18 22:40:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:14,673 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-03-18 22:40:14,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-03-18 22:40:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 22:40:14,674 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:14,674 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:14,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-18 22:40:14,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-18 22:40:14,887 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:14,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1600440076, now seen corresponding path program 20 times [2022-03-18 22:40:14,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:14,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826588032] [2022-03-18 22:40:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:14,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:14,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:14,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:15,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 22:40:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:15,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:15,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826588032] [2022-03-18 22:40:15,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826588032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:15,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651498847] [2022-03-18 22:40:15,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:40:15,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:15,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:15,338 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:15,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-18 22:40:15,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:40:15,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:15,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 22:40:15,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:16,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:17,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651498847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:17,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:17,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2022-03-18 22:40:17,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727918918] [2022-03-18 22:40:17,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:17,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-18 22:40:17,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:17,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-18 22:40:17,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 22:40:17,206 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:18,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:18,136 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2022-03-18 22:40:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 22:40:18,137 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 75 [2022-03-18 22:40:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:18,137 INFO L225 Difference]: With dead ends: 103 [2022-03-18 22:40:18,137 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 22:40:18,139 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5965 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2103, Invalid=11237, Unknown=0, NotChecked=0, Total=13340 [2022-03-18 22:40:18,139 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:18,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 117 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:40:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 22:40:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2022-03-18 22:40:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 77 states have internal predecessors, (80), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-03-18 22:40:18,149 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 75 [2022-03-18 22:40:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:18,149 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-03-18 22:40:18,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-03-18 22:40:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 22:40:18,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:18,150 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:18,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-18 22:40:18,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-18 22:40:18,363 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:18,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2075827329, now seen corresponding path program 20 times [2022-03-18 22:40:18,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:18,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348430697] [2022-03-18 22:40:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:18,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:18,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:18,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:18,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 22:40:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:18,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:18,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348430697] [2022-03-18 22:40:18,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348430697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:18,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537890464] [2022-03-18 22:40:18,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:40:18,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:18,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:18,835 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:18,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-18 22:40:18,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:40:18,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:18,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 22:40:18,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:19,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:20,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537890464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:20,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:20,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2022-03-18 22:40:20,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882064928] [2022-03-18 22:40:20,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:20,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-18 22:40:20,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:20,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-18 22:40:20,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 22:40:20,569 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:21,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:21,436 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2022-03-18 22:40:21,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 22:40:21,439 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 75 [2022-03-18 22:40:21,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:21,440 INFO L225 Difference]: With dead ends: 97 [2022-03-18 22:40:21,440 INFO L226 Difference]: Without dead ends: 87 [2022-03-18 22:40:21,441 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5894 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2103, Invalid=11237, Unknown=0, NotChecked=0, Total=13340 [2022-03-18 22:40:21,441 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 141 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:21,442 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 95 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:40:21,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-18 22:40:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-03-18 22:40:21,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.054054054054054) internal successors, (78), 76 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-03-18 22:40:21,448 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 75 [2022-03-18 22:40:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:21,448 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-03-18 22:40:21,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-03-18 22:40:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 22:40:21,449 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:21,449 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:21,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-18 22:40:21,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:21,650 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:21,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:21,650 INFO L85 PathProgramCache]: Analyzing trace with hash -245826649, now seen corresponding path program 21 times [2022-03-18 22:40:21,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:21,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568595595] [2022-03-18 22:40:21,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:21,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:21,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:21,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:21,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 22:40:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:22,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:22,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568595595] [2022-03-18 22:40:22,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568595595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:22,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945739319] [2022-03-18 22:40:22,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:40:22,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:22,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:22,100 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:22,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-18 22:40:22,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-18 22:40:22,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:22,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 22:40:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:22,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:24,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945739319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:24,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:24,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2022-03-18 22:40:24,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846167694] [2022-03-18 22:40:24,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:24,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-18 22:40:24,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:24,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-18 22:40:24,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 22:40:24,061 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:25,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:25,119 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2022-03-18 22:40:25,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 22:40:25,119 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-03-18 22:40:25,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:25,120 INFO L225 Difference]: With dead ends: 110 [2022-03-18 22:40:25,120 INFO L226 Difference]: Without dead ends: 99 [2022-03-18 22:40:25,121 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7025 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2413, Invalid=13589, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 22:40:25,122 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 211 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:25,122 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 87 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:40:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-18 22:40:25,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2022-03-18 22:40:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-03-18 22:40:25,132 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 77 [2022-03-18 22:40:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:25,132 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-03-18 22:40:25,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:25,133 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-03-18 22:40:25,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 22:40:25,133 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:25,133 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:25,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-18 22:40:25,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-18 22:40:25,339 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1685701061, now seen corresponding path program 21 times [2022-03-18 22:40:25,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:25,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948043027] [2022-03-18 22:40:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:25,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:25,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:25,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:25,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 22:40:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:25,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:25,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948043027] [2022-03-18 22:40:25,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948043027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:25,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599975536] [2022-03-18 22:40:25,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:40:25,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:25,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:25,868 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:25,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-18 22:40:25,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-18 22:40:25,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:25,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 22:40:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:26,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:27,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599975536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:27,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:27,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2022-03-18 22:40:27,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904002223] [2022-03-18 22:40:27,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:27,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-18 22:40:27,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:27,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-18 22:40:27,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 22:40:27,730 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:28,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:28,779 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2022-03-18 22:40:28,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 22:40:28,779 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-03-18 22:40:28,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:28,780 INFO L225 Difference]: With dead ends: 105 [2022-03-18 22:40:28,780 INFO L226 Difference]: Without dead ends: 96 [2022-03-18 22:40:28,782 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7038 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2413, Invalid=13589, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 22:40:28,782 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:28,782 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 95 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:40:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-18 22:40:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-03-18 22:40:28,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.075) internal successors, (86), 82 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2022-03-18 22:40:28,792 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 77 [2022-03-18 22:40:28,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:28,793 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2022-03-18 22:40:28,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:28,793 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2022-03-18 22:40:28,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 22:40:28,793 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:28,794 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:28,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-18 22:40:29,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-18 22:40:29,015 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:29,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:29,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1484512341, now seen corresponding path program 22 times [2022-03-18 22:40:29,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:29,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479960524] [2022-03-18 22:40:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:29,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:29,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:29,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:29,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 22:40:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:29,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:29,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479960524] [2022-03-18 22:40:29,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479960524] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:29,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158987730] [2022-03-18 22:40:29,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:40:29,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:29,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:29,496 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:29,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-18 22:40:29,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:40:29,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:29,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 22:40:29,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:30,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:31,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158987730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:31,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:31,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2022-03-18 22:40:31,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131441066] [2022-03-18 22:40:31,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:31,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-18 22:40:31,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:31,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-18 22:40:31,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 22:40:31,460 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:32,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:32,382 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2022-03-18 22:40:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 22:40:32,382 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 79 [2022-03-18 22:40:32,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:32,383 INFO L225 Difference]: With dead ends: 107 [2022-03-18 22:40:32,383 INFO L226 Difference]: Without dead ends: 95 [2022-03-18 22:40:32,385 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6894 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2401, Invalid=12851, Unknown=0, NotChecked=0, Total=15252 [2022-03-18 22:40:32,385 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 164 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:32,385 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 92 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:40:32,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-18 22:40:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-03-18 22:40:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 81 states have internal predecessors, (84), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-03-18 22:40:32,394 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 79 [2022-03-18 22:40:32,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:32,394 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-03-18 22:40:32,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-03-18 22:40:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 22:40:32,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:32,395 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:32,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-18 22:40:32,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-18 22:40:32,605 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:32,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:32,605 INFO L85 PathProgramCache]: Analyzing trace with hash 85601312, now seen corresponding path program 22 times [2022-03-18 22:40:32,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:32,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764913490] [2022-03-18 22:40:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:32,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:32,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:32,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:32,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 22:40:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:33,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:33,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764913490] [2022-03-18 22:40:33,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764913490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:33,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335182451] [2022-03-18 22:40:33,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:40:33,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:33,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:33,106 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:33,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-18 22:40:33,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:40:33,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 22:40:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:33,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:34,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335182451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:34,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:34,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2022-03-18 22:40:34,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209322414] [2022-03-18 22:40:34,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:34,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-18 22:40:34,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:34,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-18 22:40:34,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 22:40:34,911 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:35,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:35,844 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-03-18 22:40:35,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 22:40:35,844 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 79 [2022-03-18 22:40:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:35,845 INFO L225 Difference]: With dead ends: 101 [2022-03-18 22:40:35,845 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 22:40:35,847 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6817 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2401, Invalid=12851, Unknown=0, NotChecked=0, Total=15252 [2022-03-18 22:40:35,847 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 193 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:35,847 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 95 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:40:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 22:40:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-03-18 22:40:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 80 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-03-18 22:40:35,858 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 79 [2022-03-18 22:40:35,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:35,858 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-03-18 22:40:35,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:35,858 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-03-18 22:40:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 22:40:35,859 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:35,859 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:35,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-18 22:40:36,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:36,071 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1592582266, now seen corresponding path program 23 times [2022-03-18 22:40:36,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:36,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600658480] [2022-03-18 22:40:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:36,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:36,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:36,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:36,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 22:40:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:36,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:36,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600658480] [2022-03-18 22:40:36,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600658480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:36,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848812830] [2022-03-18 22:40:36,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:40:36,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:36,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:36,589 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:36,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-18 22:40:36,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-03-18 22:40:36,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:36,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 22:40:36,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:37,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:38,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848812830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:38,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:38,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2022-03-18 22:40:38,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554766875] [2022-03-18 22:40:38,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:38,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-18 22:40:38,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-18 22:40:38,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 22:40:38,797 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:39,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:39,932 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2022-03-18 22:40:39,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 22:40:39,933 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 81 [2022-03-18 22:40:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:39,934 INFO L225 Difference]: With dead ends: 114 [2022-03-18 22:40:39,934 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 22:40:39,935 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8031 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2729, Invalid=15361, Unknown=0, NotChecked=0, Total=18090 [2022-03-18 22:40:39,936 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 168 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:39,936 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 102 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:40:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 22:40:39,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2022-03-18 22:40:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-03-18 22:40:39,947 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 81 [2022-03-18 22:40:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:39,947 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-03-18 22:40:39,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-03-18 22:40:39,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 22:40:39,948 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:39,948 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:39,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-18 22:40:40,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:40,164 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:40,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:40,164 INFO L85 PathProgramCache]: Analyzing trace with hash -809821724, now seen corresponding path program 23 times [2022-03-18 22:40:40,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:40,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069710842] [2022-03-18 22:40:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:40,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:40,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:40,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:40,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 22:40:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:40,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:40,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069710842] [2022-03-18 22:40:40,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069710842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:40,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944808699] [2022-03-18 22:40:40,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:40:40,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:40,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:40,675 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:40,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-18 22:40:40,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-03-18 22:40:40,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:40,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 22:40:40,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:41,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:42,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944808699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:42,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:42,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2022-03-18 22:40:42,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609920302] [2022-03-18 22:40:42,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:42,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-18 22:40:42,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:42,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-18 22:40:42,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 22:40:42,816 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:43,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:43,872 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2022-03-18 22:40:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 22:40:43,873 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 81 [2022-03-18 22:40:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:43,873 INFO L225 Difference]: With dead ends: 109 [2022-03-18 22:40:43,873 INFO L226 Difference]: Without dead ends: 100 [2022-03-18 22:40:43,875 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8045 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2729, Invalid=15361, Unknown=0, NotChecked=0, Total=18090 [2022-03-18 22:40:43,875 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 223 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:43,875 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 65 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:40:43,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-18 22:40:43,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-03-18 22:40:43,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 86 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:43,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2022-03-18 22:40:43,883 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 81 [2022-03-18 22:40:43,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:43,883 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2022-03-18 22:40:43,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:43,884 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2022-03-18 22:40:43,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 22:40:43,884 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:43,884 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:43,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-18 22:40:44,084 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:44,085 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:44,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:44,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1204809738, now seen corresponding path program 24 times [2022-03-18 22:40:44,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:44,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939004727] [2022-03-18 22:40:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:44,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:44,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:44,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:44,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 22:40:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:44,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:44,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939004727] [2022-03-18 22:40:44,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939004727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:44,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448202518] [2022-03-18 22:40:44,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:40:44,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:44,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:44,532 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:44,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-18 22:40:44,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-03-18 22:40:44,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:44,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 22:40:44,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:45,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:46,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448202518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:46,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:46,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2022-03-18 22:40:46,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956419533] [2022-03-18 22:40:46,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:46,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-18 22:40:46,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:46,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-18 22:40:46,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 22:40:46,598 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:47,573 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2022-03-18 22:40:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 22:40:47,574 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 83 [2022-03-18 22:40:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:47,574 INFO L225 Difference]: With dead ends: 111 [2022-03-18 22:40:47,574 INFO L226 Difference]: Without dead ends: 99 [2022-03-18 22:40:47,576 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7890 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2719, Invalid=14573, Unknown=0, NotChecked=0, Total=17292 [2022-03-18 22:40:47,576 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 160 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:47,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 72 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:40:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-18 22:40:47,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-03-18 22:40:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 85 states have internal predecessors, (88), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2022-03-18 22:40:47,584 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 83 [2022-03-18 22:40:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:47,584 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2022-03-18 22:40:47,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2022-03-18 22:40:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 22:40:47,585 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:47,585 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:47,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-18 22:40:47,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-18 22:40:47,799 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:47,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:47,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1754961025, now seen corresponding path program 24 times [2022-03-18 22:40:47,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:47,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9016573] [2022-03-18 22:40:47,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:47,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:47,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:47,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:48,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 22:40:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:48,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:48,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9016573] [2022-03-18 22:40:48,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9016573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:48,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991407527] [2022-03-18 22:40:48,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:40:48,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:48,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:48,392 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:48,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-18 22:40:48,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-03-18 22:40:48,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:48,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 22:40:48,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:49,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:50,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991407527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:50,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:50,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2022-03-18 22:40:50,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115367242] [2022-03-18 22:40:50,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:50,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-18 22:40:50,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:50,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-18 22:40:50,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 22:40:50,473 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:51,502 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2022-03-18 22:40:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 22:40:51,503 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 83 [2022-03-18 22:40:51,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:51,503 INFO L225 Difference]: With dead ends: 105 [2022-03-18 22:40:51,503 INFO L226 Difference]: Without dead ends: 95 [2022-03-18 22:40:51,505 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7807 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2719, Invalid=14573, Unknown=0, NotChecked=0, Total=17292 [2022-03-18 22:40:51,505 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:51,505 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 100 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:40:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-18 22:40:51,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-03-18 22:40:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.048780487804878) internal successors, (86), 84 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-03-18 22:40:51,516 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 83 [2022-03-18 22:40:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:51,516 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-03-18 22:40:51,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-03-18 22:40:51,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 22:40:51,517 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:51,517 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:51,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-18 22:40:51,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-18 22:40:51,723 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:51,724 INFO L85 PathProgramCache]: Analyzing trace with hash -846462171, now seen corresponding path program 25 times [2022-03-18 22:40:51,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:51,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389508327] [2022-03-18 22:40:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:51,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:51,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:51,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:51,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 22:40:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:52,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:52,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389508327] [2022-03-18 22:40:52,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389508327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:52,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088149410] [2022-03-18 22:40:52,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:40:52,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:52,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:52,195 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:52,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-18 22:40:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:52,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 22:40:52,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:53,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:54,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088149410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:54,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:54,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2022-03-18 22:40:54,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102366111] [2022-03-18 22:40:54,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:54,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-18 22:40:54,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:54,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-18 22:40:54,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2022-03-18 22:40:54,471 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:55,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:55,715 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2022-03-18 22:40:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 22:40:55,716 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2022-03-18 22:40:55,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:55,716 INFO L225 Difference]: With dead ends: 118 [2022-03-18 22:40:55,716 INFO L226 Difference]: Without dead ends: 107 [2022-03-18 22:40:55,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9104 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3065, Invalid=17241, Unknown=0, NotChecked=0, Total=20306 [2022-03-18 22:40:55,719 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 195 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:55,719 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 92 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:40:55,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-18 22:40:55,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2022-03-18 22:40:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 87 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-03-18 22:40:55,729 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 85 [2022-03-18 22:40:55,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:55,729 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-03-18 22:40:55,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:55,729 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-03-18 22:40:55,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 22:40:55,730 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:55,730 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:55,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-18 22:40:55,930 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-18 22:40:55,930 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:55,931 INFO L85 PathProgramCache]: Analyzing trace with hash -222355005, now seen corresponding path program 25 times [2022-03-18 22:40:55,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:55,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190158349] [2022-03-18 22:40:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:55,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:55,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:55,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:40:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:56,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 22:40:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:56,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:56,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190158349] [2022-03-18 22:40:56,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190158349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:56,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044481574] [2022-03-18 22:40:56,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:40:56,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:56,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:56,530 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:56,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-18 22:40:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:56,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 22:40:56,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:57,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:58,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044481574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:58,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:58,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2022-03-18 22:40:58,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512330709] [2022-03-18 22:40:58,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:58,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-18 22:40:58,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:58,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-18 22:40:58,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2022-03-18 22:40:58,766 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:59,947 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2022-03-18 22:40:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 22:40:59,948 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2022-03-18 22:40:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:59,949 INFO L225 Difference]: With dead ends: 113 [2022-03-18 22:40:59,949 INFO L226 Difference]: Without dead ends: 104 [2022-03-18 22:40:59,950 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9119 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3065, Invalid=17241, Unknown=0, NotChecked=0, Total=20306 [2022-03-18 22:40:59,950 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 191 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:59,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 85 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:40:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-18 22:40:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-03-18 22:40:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 90 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:40:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2022-03-18 22:40:59,962 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 85 [2022-03-18 22:40:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:59,962 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2022-03-18 22:40:59,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:40:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2022-03-18 22:40:59,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 22:40:59,963 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:59,963 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:59,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-18 22:41:00,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-18 22:41:00,171 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:41:00,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:41:00,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1175356375, now seen corresponding path program 26 times [2022-03-18 22:41:00,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:41:00,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594122613] [2022-03-18 22:41:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:41:00,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:41:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:00,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:41:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:00,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:41:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:00,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 22:41:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:00,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:41:00,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594122613] [2022-03-18 22:41:00,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594122613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:41:00,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227518248] [2022-03-18 22:41:00,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:41:00,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:00,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:41:00,700 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:41:00,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-18 22:41:00,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:41:00,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:41:00,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 22:41:00,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:41:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:01,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:41:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:03,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227518248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:41:03,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:41:03,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2022-03-18 22:41:03,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777570667] [2022-03-18 22:41:03,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:41:03,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-18 22:41:03,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:41:03,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-18 22:41:03,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 22:41:03,008 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:04,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:41:04,117 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2022-03-18 22:41:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 22:41:04,117 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 87 [2022-03-18 22:41:04,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:41:04,118 INFO L225 Difference]: With dead ends: 115 [2022-03-18 22:41:04,118 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 22:41:04,120 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8953 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3057, Invalid=16403, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 22:41:04,120 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 146 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:41:04,120 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 102 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:41:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 22:41:04,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2022-03-18 22:41:04,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 89 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:41:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2022-03-18 22:41:04,132 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 87 [2022-03-18 22:41:04,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:41:04,132 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2022-03-18 22:41:04,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:04,132 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2022-03-18 22:41:04,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 22:41:04,132 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:41:04,132 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:41:04,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-18 22:41:04,333 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-18 22:41:04,333 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:41:04,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:41:04,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2037754526, now seen corresponding path program 26 times [2022-03-18 22:41:04,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:41:04,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497013494] [2022-03-18 22:41:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:41:04,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:41:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:04,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:41:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:04,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:41:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:04,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 22:41:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:04,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:41:04,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497013494] [2022-03-18 22:41:04,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497013494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:41:04,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535366118] [2022-03-18 22:41:04,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:41:04,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:04,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:41:04,881 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:41:04,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-18 22:41:05,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:41:05,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:41:05,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 22:41:05,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:41:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:05,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:41:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:06,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535366118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:41:06,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:41:06,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2022-03-18 22:41:06,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463080802] [2022-03-18 22:41:06,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:41:06,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-18 22:41:06,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:41:06,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-18 22:41:06,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 22:41:06,979 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:41:08,126 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2022-03-18 22:41:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 22:41:08,126 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 87 [2022-03-18 22:41:08,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:41:08,127 INFO L225 Difference]: With dead ends: 109 [2022-03-18 22:41:08,127 INFO L226 Difference]: Without dead ends: 99 [2022-03-18 22:41:08,129 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8864 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3057, Invalid=16403, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 22:41:08,129 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 142 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:41:08,129 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 130 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:41:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-18 22:41:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-03-18 22:41:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 88 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:41:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-03-18 22:41:08,142 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 87 [2022-03-18 22:41:08,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:41:08,142 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-03-18 22:41:08,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:08,142 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-03-18 22:41:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 22:41:08,143 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:41:08,143 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:41:08,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-18 22:41:08,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-18 22:41:08,367 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:41:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:41:08,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1820915332, now seen corresponding path program 27 times [2022-03-18 22:41:08,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:41:08,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350863002] [2022-03-18 22:41:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:41:08,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:41:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:08,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:41:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:08,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:41:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:08,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 22:41:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:08,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:41:08,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350863002] [2022-03-18 22:41:08,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350863002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:41:08,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068045613] [2022-03-18 22:41:08,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:41:08,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:08,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:41:08,868 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:41:08,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-18 22:41:09,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-18 22:41:09,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:41:09,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 22:41:09,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:41:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:09,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:41:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:11,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068045613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:41:11,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:41:11,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2022-03-18 22:41:11,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011113356] [2022-03-18 22:41:11,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:41:11,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-18 22:41:11,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:41:11,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-18 22:41:11,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2022-03-18 22:41:11,362 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:12,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:41:12,735 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-03-18 22:41:12,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 22:41:12,735 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 89 [2022-03-18 22:41:12,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:41:12,736 INFO L225 Difference]: With dead ends: 122 [2022-03-18 22:41:12,736 INFO L226 Difference]: Without dead ends: 111 [2022-03-18 22:41:12,738 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10244 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3421, Invalid=19229, Unknown=0, NotChecked=0, Total=22650 [2022-03-18 22:41:12,738 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 182 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:41:12,739 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 122 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:41:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-18 22:41:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2022-03-18 22:41:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 91 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:41:12,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-03-18 22:41:12,769 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 89 [2022-03-18 22:41:12,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:41:12,770 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-03-18 22:41:12,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:12,770 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-03-18 22:41:12,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 22:41:12,770 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:41:12,770 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:41:12,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-18 22:41:12,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:12,991 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:41:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:41:12,992 INFO L85 PathProgramCache]: Analyzing trace with hash 302983522, now seen corresponding path program 27 times [2022-03-18 22:41:12,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:41:12,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25561632] [2022-03-18 22:41:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:41:12,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:41:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:13,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:41:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:13,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:41:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:13,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 22:41:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:13,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:41:13,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25561632] [2022-03-18 22:41:13,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25561632] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:41:13,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528367579] [2022-03-18 22:41:13,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:41:13,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:13,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:41:13,580 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:41:13,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-18 22:41:13,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-18 22:41:13,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:41:13,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 22:41:13,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:41:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:14,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:41:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:15,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528367579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:41:15,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:41:15,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2022-03-18 22:41:15,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126990164] [2022-03-18 22:41:15,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:41:15,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-18 22:41:15,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:41:15,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-18 22:41:15,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2022-03-18 22:41:15,954 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:17,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:41:17,249 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-03-18 22:41:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 22:41:17,250 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 89 [2022-03-18 22:41:17,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:41:17,250 INFO L225 Difference]: With dead ends: 117 [2022-03-18 22:41:17,251 INFO L226 Difference]: Without dead ends: 108 [2022-03-18 22:41:17,252 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10260 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3421, Invalid=19229, Unknown=0, NotChecked=0, Total=22650 [2022-03-18 22:41:17,252 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 215 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:41:17,252 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 90 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:41:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-18 22:41:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2022-03-18 22:41:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.065217391304348) internal successors, (98), 94 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:41:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2022-03-18 22:41:17,267 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 89 [2022-03-18 22:41:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:41:17,267 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2022-03-18 22:41:17,267 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2022-03-18 22:41:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 22:41:17,268 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:41:17,269 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:41:17,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-18 22:41:17,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:17,483 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:41:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:41:17,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1163794440, now seen corresponding path program 28 times [2022-03-18 22:41:17,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:41:17,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133947300] [2022-03-18 22:41:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:41:17,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:41:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:17,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:41:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:17,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:41:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:17,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 22:41:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:17,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:41:17,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133947300] [2022-03-18 22:41:17,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133947300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:41:17,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486968514] [2022-03-18 22:41:17,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:41:17,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:17,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:41:17,983 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:41:17,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-18 22:41:18,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:41:18,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:41:18,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 22:41:18,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:41:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:18,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:41:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:20,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486968514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:41:20,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:41:20,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2022-03-18 22:41:20,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242565806] [2022-03-18 22:41:20,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:41:20,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-18 22:41:20,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:41:20,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-18 22:41:20,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2022-03-18 22:41:20,413 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:41:21,508 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2022-03-18 22:41:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 22:41:21,509 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 91 [2022-03-18 22:41:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:41:21,509 INFO L225 Difference]: With dead ends: 119 [2022-03-18 22:41:21,510 INFO L226 Difference]: Without dead ends: 107 [2022-03-18 22:41:21,512 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10083 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3415, Invalid=18341, Unknown=0, NotChecked=0, Total=21756 [2022-03-18 22:41:21,512 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 172 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:41:21,512 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 77 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:41:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-18 22:41:21,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-03-18 22:41:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.054945054945055) internal successors, (96), 93 states have internal predecessors, (96), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:41:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-03-18 22:41:21,521 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 91 [2022-03-18 22:41:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:41:21,521 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-03-18 22:41:21,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:21,522 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-03-18 22:41:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 22:41:21,522 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:41:21,522 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:41:21,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-18 22:41:21,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:21,723 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:41:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:41:21,723 INFO L85 PathProgramCache]: Analyzing trace with hash 871381373, now seen corresponding path program 28 times [2022-03-18 22:41:21,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:41:21,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032709408] [2022-03-18 22:41:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:41:21,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:41:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:21,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:41:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:21,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:41:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:22,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 22:41:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:22,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:41:22,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032709408] [2022-03-18 22:41:22,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032709408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:41:22,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310940481] [2022-03-18 22:41:22,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:41:22,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:22,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:41:22,351 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:41:22,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-18 22:41:22,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:41:22,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:41:22,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 22:41:22,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:41:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:23,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:41:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:24,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310940481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:41:24,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:41:24,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2022-03-18 22:41:24,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049072240] [2022-03-18 22:41:24,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:41:24,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-18 22:41:24,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:41:24,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-18 22:41:24,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2022-03-18 22:41:24,687 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:25,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:41:25,865 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-03-18 22:41:25,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 22:41:25,866 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 91 [2022-03-18 22:41:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:41:25,866 INFO L225 Difference]: With dead ends: 113 [2022-03-18 22:41:25,866 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 22:41:25,867 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9988 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3415, Invalid=18341, Unknown=0, NotChecked=0, Total=21756 [2022-03-18 22:41:25,867 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 178 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:41:25,868 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 105 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:41:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 22:41:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-03-18 22:41:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 92 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:41:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-03-18 22:41:25,879 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 91 [2022-03-18 22:41:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:41:25,879 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-03-18 22:41:25,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-03-18 22:41:25,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 22:41:25,880 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:41:25,880 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:41:25,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-18 22:41:26,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-18 22:41:26,095 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:41:26,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:41:26,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1922779555, now seen corresponding path program 29 times [2022-03-18 22:41:26,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:41:26,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433853641] [2022-03-18 22:41:26,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:41:26,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:41:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:26,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:41:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:26,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:41:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:26,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 22:41:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:26,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:41:26,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433853641] [2022-03-18 22:41:26,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433853641] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:41:26,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279134953] [2022-03-18 22:41:26,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:41:26,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:26,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:41:26,665 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:41:26,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-18 22:41:26,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-03-18 22:41:26,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:41:26,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 22:41:26,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:41:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:27,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:41:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:29,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279134953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:41:29,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:41:29,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2022-03-18 22:41:29,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79010291] [2022-03-18 22:41:29,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:41:29,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-18 22:41:29,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:41:29,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-18 22:41:29,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 22:41:29,263 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:30,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:41:30,660 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-03-18 22:41:30,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 22:41:30,661 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 93 [2022-03-18 22:41:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:41:30,661 INFO L225 Difference]: With dead ends: 126 [2022-03-18 22:41:30,662 INFO L226 Difference]: Without dead ends: 115 [2022-03-18 22:41:30,664 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11451 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3797, Invalid=21325, Unknown=0, NotChecked=0, Total=25122 [2022-03-18 22:41:30,664 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:41:30,664 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 102 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:41:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-18 22:41:30,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-03-18 22:41:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 93 states have (on average 1.053763440860215) internal successors, (98), 95 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:41:30,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-03-18 22:41:30,677 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 93 [2022-03-18 22:41:30,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:41:30,678 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-03-18 22:41:30,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:30,678 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-03-18 22:41:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 22:41:30,678 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:41:30,679 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:41:30,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-18 22:41:30,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-03-18 22:41:30,883 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:41:30,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:41:30,884 INFO L85 PathProgramCache]: Analyzing trace with hash -805273407, now seen corresponding path program 29 times [2022-03-18 22:41:30,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:41:30,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559499288] [2022-03-18 22:41:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:41:30,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:41:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:30,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:41:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:30,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:41:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:31,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 22:41:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:31,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:41:31,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559499288] [2022-03-18 22:41:31,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559499288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:41:31,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525504879] [2022-03-18 22:41:31,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:41:31,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:31,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:41:31,547 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:41:31,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-18 22:41:31,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-03-18 22:41:31,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:41:31,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 22:41:31,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:41:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:32,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:41:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:34,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525504879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:41:34,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:41:34,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2022-03-18 22:41:34,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230337776] [2022-03-18 22:41:34,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:41:34,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-18 22:41:34,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:41:34,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-18 22:41:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 22:41:34,095 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:35,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:41:35,571 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2022-03-18 22:41:35,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 22:41:35,572 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 93 [2022-03-18 22:41:35,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:41:35,572 INFO L225 Difference]: With dead ends: 121 [2022-03-18 22:41:35,572 INFO L226 Difference]: Without dead ends: 112 [2022-03-18 22:41:35,574 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11468 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3797, Invalid=21325, Unknown=0, NotChecked=0, Total=25122 [2022-03-18 22:41:35,574 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 149 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:41:35,574 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 110 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:41:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-18 22:41:35,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2022-03-18 22:41:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 96 states have (on average 1.0625) internal successors, (102), 98 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:41:35,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2022-03-18 22:41:35,587 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 93 [2022-03-18 22:41:35,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:41:35,588 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2022-03-18 22:41:35,588 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2022-03-18 22:41:35,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-18 22:41:35,588 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:41:35,589 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:41:35,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-18 22:41:35,804 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:35,804 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:41:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:41:35,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1280775079, now seen corresponding path program 30 times [2022-03-18 22:41:35,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:41:35,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76276361] [2022-03-18 22:41:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:41:35,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:41:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:35,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:41:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:35,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:41:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:36,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 22:41:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:36,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:41:36,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76276361] [2022-03-18 22:41:36,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76276361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:41:36,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637858389] [2022-03-18 22:41:36,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:41:36,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:36,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:41:36,345 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:41:36,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-18 22:41:36,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-18 22:41:36,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:41:36,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 22:41:36,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:41:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:37,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:41:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:38,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637858389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:41:38,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:41:38,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2022-03-18 22:41:38,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316186225] [2022-03-18 22:41:38,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:41:38,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-18 22:41:38,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:41:38,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-18 22:41:38,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2022-03-18 22:41:38,886 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:40,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:41:40,366 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-03-18 22:41:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 22:41:40,366 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 95 [2022-03-18 22:41:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:41:40,367 INFO L225 Difference]: With dead ends: 123 [2022-03-18 22:41:40,367 INFO L226 Difference]: Without dead ends: 111 [2022-03-18 22:41:40,370 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11280 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3793, Invalid=20387, Unknown=0, NotChecked=0, Total=24180 [2022-03-18 22:41:40,370 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 197 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:41:40,370 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 92 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:41:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-18 22:41:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2022-03-18 22:41:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 97 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:41:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2022-03-18 22:41:40,385 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 95 [2022-03-18 22:41:40,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:41:40,385 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2022-03-18 22:41:40,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:40,385 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2022-03-18 22:41:40,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-18 22:41:40,386 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:41:40,386 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:41:40,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-18 22:41:40,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:40,599 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:41:40,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:41:40,600 INFO L85 PathProgramCache]: Analyzing trace with hash -565811172, now seen corresponding path program 30 times [2022-03-18 22:41:40,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:41:40,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874859986] [2022-03-18 22:41:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:41:40,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:41:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:40,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:41:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:40,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:41:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:40,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 22:41:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:41,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:41:41,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874859986] [2022-03-18 22:41:41,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874859986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:41:41,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028603282] [2022-03-18 22:41:41,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:41:41,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:41,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:41:41,257 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:41:41,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-18 22:41:41,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-18 22:41:41,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:41:41,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 22:41:41,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:41:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:42,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:41:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:43,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028603282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:41:43,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:41:43,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2022-03-18 22:41:43,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753764976] [2022-03-18 22:41:43,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:41:43,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-18 22:41:43,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:41:43,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-18 22:41:43,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2022-03-18 22:41:43,657 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:41:44,890 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2022-03-18 22:41:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 22:41:44,890 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 95 [2022-03-18 22:41:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:41:44,891 INFO L225 Difference]: With dead ends: 117 [2022-03-18 22:41:44,891 INFO L226 Difference]: Without dead ends: 107 [2022-03-18 22:41:44,892 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11179 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3793, Invalid=20387, Unknown=0, NotChecked=0, Total=24180 [2022-03-18 22:41:44,892 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 152 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:41:44,893 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 95 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:41:44,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-18 22:41:44,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-03-18 22:41:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 96 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:41:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2022-03-18 22:41:44,907 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 95 [2022-03-18 22:41:44,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:41:44,907 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2022-03-18 22:41:44,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:44,907 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2022-03-18 22:41:44,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 22:41:44,908 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:41:44,908 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:41:44,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-18 22:41:45,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-18 22:41:45,127 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:41:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:41:45,128 INFO L85 PathProgramCache]: Analyzing trace with hash -534754174, now seen corresponding path program 31 times [2022-03-18 22:41:45,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:41:45,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205239608] [2022-03-18 22:41:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:41:45,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:41:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:45,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:41:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:45,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:41:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:45,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 22:41:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:45,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:41:45,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205239608] [2022-03-18 22:41:45,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205239608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:41:45,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938101962] [2022-03-18 22:41:45,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:41:45,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:45,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:41:45,691 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:41:45,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-18 22:41:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:45,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 22:41:45,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:41:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:46,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:41:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:48,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938101962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:41:48,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:41:48,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2022-03-18 22:41:48,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321126750] [2022-03-18 22:41:48,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:41:48,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-03-18 22:41:48,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:41:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-03-18 22:41:48,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2022-03-18 22:41:48,528 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:41:50,112 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2022-03-18 22:41:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 22:41:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 97 [2022-03-18 22:41:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:41:50,120 INFO L225 Difference]: With dead ends: 130 [2022-03-18 22:41:50,120 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 22:41:50,122 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12725 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4193, Invalid=23529, Unknown=0, NotChecked=0, Total=27722 [2022-03-18 22:41:50,123 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:41:50,123 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 127 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:41:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 22:41:50,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-03-18 22:41:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 99 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:41:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2022-03-18 22:41:50,136 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 97 [2022-03-18 22:41:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:41:50,136 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2022-03-18 22:41:50,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2022-03-18 22:41:50,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 22:41:50,137 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:41:50,137 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:41:50,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-18 22:41:50,337 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-18 22:41:50,337 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:41:50,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:41:50,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2041870304, now seen corresponding path program 31 times [2022-03-18 22:41:50,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:41:50,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777215107] [2022-03-18 22:41:50,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:41:50,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:41:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:50,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:41:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:50,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:41:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:50,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 22:41:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:51,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:41:51,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777215107] [2022-03-18 22:41:51,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777215107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:41:51,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294034098] [2022-03-18 22:41:51,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:41:51,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:51,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:41:51,060 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:41:51,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-18 22:41:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:51,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 22:41:51,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:41:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:52,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:41:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:53,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294034098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:41:53,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:41:53,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2022-03-18 22:41:53,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880646875] [2022-03-18 22:41:53,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:41:53,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-03-18 22:41:53,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:41:53,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-03-18 22:41:53,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2022-03-18 22:41:53,800 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:41:55,284 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2022-03-18 22:41:55,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 22:41:55,285 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 97 [2022-03-18 22:41:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:41:55,285 INFO L225 Difference]: With dead ends: 125 [2022-03-18 22:41:55,285 INFO L226 Difference]: Without dead ends: 116 [2022-03-18 22:41:55,286 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12743 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4193, Invalid=23529, Unknown=0, NotChecked=0, Total=27722 [2022-03-18 22:41:55,287 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 222 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:41:55,287 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 90 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:41:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-18 22:41:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-03-18 22:41:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 100 states have (on average 1.06) internal successors, (106), 102 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:41:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2022-03-18 22:41:55,298 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 97 [2022-03-18 22:41:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:41:55,298 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2022-03-18 22:41:55,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:41:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2022-03-18 22:41:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 22:41:55,299 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:41:55,299 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:41:55,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-18 22:41:55,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:55,503 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:41:55,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:41:55,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1491713798, now seen corresponding path program 32 times [2022-03-18 22:41:55,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:41:55,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883714366] [2022-03-18 22:41:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:41:55,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:41:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:55,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:41:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:55,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:41:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:55,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 22:41:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:41:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:56,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:41:56,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883714366] [2022-03-18 22:41:56,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883714366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:41:56,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190437617] [2022-03-18 22:41:56,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:41:56,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:41:56,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:41:56,067 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:41:56,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-18 22:41:56,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:41:56,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:41:56,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 22:41:56,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:41:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:57,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:41:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:41:58,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190437617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:41:58,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:41:58,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2022-03-18 22:41:58,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753991535] [2022-03-18 22:41:58,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:41:58,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-03-18 22:41:58,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:41:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-03-18 22:41:58,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2022-03-18 22:41:58,789 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:00,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:42:00,132 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2022-03-18 22:42:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 22:42:00,132 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 99 [2022-03-18 22:42:00,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:42:00,133 INFO L225 Difference]: With dead ends: 127 [2022-03-18 22:42:00,133 INFO L226 Difference]: Without dead ends: 115 [2022-03-18 22:42:00,135 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12544 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4191, Invalid=22541, Unknown=0, NotChecked=0, Total=26732 [2022-03-18 22:42:00,135 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 157 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:42:00,135 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 102 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:42:00,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-18 22:42:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-03-18 22:42:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 101 states have internal predecessors, (104), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:42:00,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-03-18 22:42:00,151 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 99 [2022-03-18 22:42:00,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:42:00,151 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-03-18 22:42:00,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:00,152 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-03-18 22:42:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 22:42:00,152 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:42:00,152 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:42:00,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-18 22:42:00,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-18 22:42:00,367 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:42:00,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:42:00,368 INFO L85 PathProgramCache]: Analyzing trace with hash 733316731, now seen corresponding path program 32 times [2022-03-18 22:42:00,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:42:00,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242103328] [2022-03-18 22:42:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:42:00,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:42:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:00,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:42:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:00,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:42:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:00,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 22:42:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:01,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:42:01,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242103328] [2022-03-18 22:42:01,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242103328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:42:01,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538855208] [2022-03-18 22:42:01,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:42:01,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:01,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:42:01,090 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:42:01,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-18 22:42:01,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:42:01,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:42:01,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 22:42:01,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:42:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:02,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:42:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:03,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538855208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:42:03,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:42:03,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2022-03-18 22:42:03,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878438606] [2022-03-18 22:42:03,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:42:03,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-03-18 22:42:03,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:42:03,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-03-18 22:42:03,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2022-03-18 22:42:03,774 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:42:05,129 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2022-03-18 22:42:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 22:42:05,129 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 99 [2022-03-18 22:42:05,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:42:05,129 INFO L225 Difference]: With dead ends: 121 [2022-03-18 22:42:05,130 INFO L226 Difference]: Without dead ends: 111 [2022-03-18 22:42:05,131 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12437 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4191, Invalid=22541, Unknown=0, NotChecked=0, Total=26732 [2022-03-18 22:42:05,132 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 140 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:42:05,132 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 125 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:42:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-18 22:42:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-03-18 22:42:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 100 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:42:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-03-18 22:42:05,148 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 99 [2022-03-18 22:42:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:42:05,148 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-03-18 22:42:05,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:05,149 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-03-18 22:42:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 22:42:05,149 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:42:05,149 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:42:05,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-18 22:42:05,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:05,371 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:42:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:42:05,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1908322527, now seen corresponding path program 33 times [2022-03-18 22:42:05,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:42:05,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070140286] [2022-03-18 22:42:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:42:05,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:42:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:05,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:42:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:05,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:42:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:05,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 22:42:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:05,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:42:05,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070140286] [2022-03-18 22:42:05,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070140286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:42:05,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977239792] [2022-03-18 22:42:05,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:42:05,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:05,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:42:05,977 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:42:05,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-18 22:42:06,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-03-18 22:42:06,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:42:06,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 22:42:06,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:42:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:07,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:42:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:09,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977239792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:42:09,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:42:09,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2022-03-18 22:42:09,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994540293] [2022-03-18 22:42:09,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:42:09,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-03-18 22:42:09,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:42:09,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-03-18 22:42:09,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2022-03-18 22:42:09,032 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:42:10,789 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-03-18 22:42:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 22:42:10,790 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 101 [2022-03-18 22:42:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:42:10,791 INFO L225 Difference]: With dead ends: 134 [2022-03-18 22:42:10,791 INFO L226 Difference]: Without dead ends: 123 [2022-03-18 22:42:10,794 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14066 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4609, Invalid=25841, Unknown=0, NotChecked=0, Total=30450 [2022-03-18 22:42:10,794 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:42:10,794 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 112 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:42:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-18 22:42:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2022-03-18 22:42:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 103 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:42:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2022-03-18 22:42:10,812 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 101 [2022-03-18 22:42:10,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:42:10,813 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2022-03-18 22:42:10,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2022-03-18 22:42:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 22:42:10,814 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:42:10,814 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:42:10,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-18 22:42:11,037 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:11,037 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:42:11,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:42:11,038 INFO L85 PathProgramCache]: Analyzing trace with hash 337141439, now seen corresponding path program 33 times [2022-03-18 22:42:11,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:42:11,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276438479] [2022-03-18 22:42:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:42:11,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:42:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:11,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:42:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:11,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:42:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:11,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 22:42:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:11,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:42:11,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276438479] [2022-03-18 22:42:11,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276438479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:42:11,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334881261] [2022-03-18 22:42:11,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:42:11,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:11,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:42:11,776 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:42:11,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-18 22:42:12,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-03-18 22:42:12,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:42:12,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 22:42:12,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:42:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:13,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:42:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:14,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334881261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:42:14,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:42:14,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2022-03-18 22:42:14,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137606310] [2022-03-18 22:42:14,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:42:14,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-03-18 22:42:14,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:42:14,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-03-18 22:42:14,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2022-03-18 22:42:14,766 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:42:16,410 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2022-03-18 22:42:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 22:42:16,411 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 101 [2022-03-18 22:42:16,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:42:16,411 INFO L225 Difference]: With dead ends: 129 [2022-03-18 22:42:16,411 INFO L226 Difference]: Without dead ends: 120 [2022-03-18 22:42:16,413 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14085 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4609, Invalid=25841, Unknown=0, NotChecked=0, Total=30450 [2022-03-18 22:42:16,413 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 168 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:42:16,413 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 120 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:42:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-18 22:42:16,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2022-03-18 22:42:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 104 states have (on average 1.0576923076923077) internal successors, (110), 106 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:42:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2022-03-18 22:42:16,428 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 101 [2022-03-18 22:42:16,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:42:16,428 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2022-03-18 22:42:16,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2022-03-18 22:42:16,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-18 22:42:16,429 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:42:16,429 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:42:16,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-18 22:42:16,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-18 22:42:16,633 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:42:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:42:16,633 INFO L85 PathProgramCache]: Analyzing trace with hash -370185691, now seen corresponding path program 34 times [2022-03-18 22:42:16,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:42:16,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673554591] [2022-03-18 22:42:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:42:16,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:42:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:16,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:42:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:16,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:42:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:16,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 22:42:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:17,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:42:17,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673554591] [2022-03-18 22:42:17,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673554591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:42:17,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339307133] [2022-03-18 22:42:17,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:42:17,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:17,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:42:17,239 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:42:17,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-18 22:42:17,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:42:17,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:42:17,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 22:42:17,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:42:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:18,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:42:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:20,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339307133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:42:20,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:42:20,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2022-03-18 22:42:20,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131304400] [2022-03-18 22:42:20,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:42:20,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-03-18 22:42:20,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:42:20,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-03-18 22:42:20,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2022-03-18 22:42:20,152 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:21,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:42:21,625 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2022-03-18 22:42:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 22:42:21,625 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2022-03-18 22:42:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:42:21,626 INFO L225 Difference]: With dead ends: 131 [2022-03-18 22:42:21,626 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 22:42:21,628 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13875 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4609, Invalid=24803, Unknown=0, NotChecked=0, Total=29412 [2022-03-18 22:42:21,628 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 148 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:42:21,628 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 112 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:42:21,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 22:42:21,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2022-03-18 22:42:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 105 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:42:21,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-03-18 22:42:21,643 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 103 [2022-03-18 22:42:21,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:42:21,643 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-03-18 22:42:21,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:21,643 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-03-18 22:42:21,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-18 22:42:21,644 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:42:21,644 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:42:21,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-18 22:42:21,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:21,851 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:42:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:42:21,851 INFO L85 PathProgramCache]: Analyzing trace with hash 944170138, now seen corresponding path program 34 times [2022-03-18 22:42:21,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:42:21,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634370948] [2022-03-18 22:42:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:42:21,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:42:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:21,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:42:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:21,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:42:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:22,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 22:42:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:22,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:42:22,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634370948] [2022-03-18 22:42:22,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634370948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:42:22,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223525419] [2022-03-18 22:42:22,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:42:22,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:22,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:42:22,587 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:42:22,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-18 22:42:22,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:42:22,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:42:22,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 22:42:22,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:42:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:23,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:42:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:25,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223525419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:42:25,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:42:25,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2022-03-18 22:42:25,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659468296] [2022-03-18 22:42:25,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:42:25,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-03-18 22:42:25,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:42:25,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-03-18 22:42:25,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2022-03-18 22:42:25,471 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:42:26,925 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-03-18 22:42:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 22:42:26,926 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2022-03-18 22:42:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:42:26,926 INFO L225 Difference]: With dead ends: 125 [2022-03-18 22:42:26,926 INFO L226 Difference]: Without dead ends: 115 [2022-03-18 22:42:26,928 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13762 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4609, Invalid=24803, Unknown=0, NotChecked=0, Total=29412 [2022-03-18 22:42:26,928 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 148 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:42:26,928 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 100 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:42:26,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-18 22:42:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-03-18 22:42:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 104 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:42:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-03-18 22:42:26,945 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 103 [2022-03-18 22:42:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:42:26,945 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-03-18 22:42:26,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-03-18 22:42:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-18 22:42:26,946 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:42:26,946 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:42:26,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-18 22:42:27,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:27,151 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:42:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:42:27,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1141661312, now seen corresponding path program 35 times [2022-03-18 22:42:27,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:42:27,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283015882] [2022-03-18 22:42:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:42:27,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:42:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:27,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:42:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:27,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:42:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:27,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 22:42:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:27,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:42:27,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283015882] [2022-03-18 22:42:27,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283015882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:42:27,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282535826] [2022-03-18 22:42:27,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:42:27,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:27,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:42:27,784 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:42:27,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-18 22:42:28,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-03-18 22:42:28,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:42:28,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 22:42:28,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:42:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:29,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:42:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:31,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282535826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:42:31,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:42:31,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2022-03-18 22:42:31,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168715615] [2022-03-18 22:42:31,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:42:31,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-03-18 22:42:31,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:42:31,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-03-18 22:42:31,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2022-03-18 22:42:31,128 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:32,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:42:32,826 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2022-03-18 22:42:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 22:42:32,827 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2022-03-18 22:42:32,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:42:32,827 INFO L225 Difference]: With dead ends: 138 [2022-03-18 22:42:32,827 INFO L226 Difference]: Without dead ends: 127 [2022-03-18 22:42:32,829 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15474 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5045, Invalid=28261, Unknown=0, NotChecked=0, Total=33306 [2022-03-18 22:42:32,830 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 209 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:42:32,830 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 127 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:42:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-18 22:42:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2022-03-18 22:42:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 107 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:42:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2022-03-18 22:42:32,845 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 105 [2022-03-18 22:42:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:42:32,845 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2022-03-18 22:42:32,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:32,846 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2022-03-18 22:42:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-18 22:42:32,846 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:42:32,846 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:42:32,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-18 22:42:33,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:33,059 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:42:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:42:33,060 INFO L85 PathProgramCache]: Analyzing trace with hash 686130526, now seen corresponding path program 35 times [2022-03-18 22:42:33,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:42:33,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902720412] [2022-03-18 22:42:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:42:33,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:42:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:33,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:42:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:33,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:42:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:33,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 22:42:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:33,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:42:33,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902720412] [2022-03-18 22:42:33,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902720412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:42:33,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939071278] [2022-03-18 22:42:33,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:42:33,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:33,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:42:33,827 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:42:33,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-18 22:42:34,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-03-18 22:42:34,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:42:34,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 22:42:34,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:42:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:35,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:42:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:36,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939071278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:42:36,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:42:36,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2022-03-18 22:42:36,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174874128] [2022-03-18 22:42:36,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:42:36,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-03-18 22:42:36,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:42:36,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-03-18 22:42:36,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2022-03-18 22:42:36,913 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:42:38,591 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2022-03-18 22:42:38,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 22:42:38,592 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2022-03-18 22:42:38,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:42:38,592 INFO L225 Difference]: With dead ends: 133 [2022-03-18 22:42:38,592 INFO L226 Difference]: Without dead ends: 124 [2022-03-18 22:42:38,593 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15494 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5045, Invalid=28261, Unknown=0, NotChecked=0, Total=33306 [2022-03-18 22:42:38,594 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:42:38,594 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 120 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:42:38,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-18 22:42:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2022-03-18 22:42:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 108 states have (on average 1.0555555555555556) internal successors, (114), 110 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:42:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2022-03-18 22:42:38,612 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 105 [2022-03-18 22:42:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:42:38,613 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2022-03-18 22:42:38,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2022-03-18 22:42:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 22:42:38,613 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:42:38,614 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:42:38,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-18 22:42:38,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-18 22:42:38,831 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:42:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:42:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash 877828, now seen corresponding path program 36 times [2022-03-18 22:42:38,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:42:38,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897233294] [2022-03-18 22:42:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:42:38,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:42:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:38,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:42:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:38,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:42:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:39,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 22:42:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:39,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:42:39,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897233294] [2022-03-18 22:42:39,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897233294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:42:39,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351117776] [2022-03-18 22:42:39,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:42:39,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:39,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:42:39,457 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:42:39,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-18 22:42:39,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-03-18 22:42:39,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:42:39,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-18 22:42:39,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:42:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:40,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:42:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:42,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351117776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:42:42,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:42:42,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2022-03-18 22:42:42,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124314259] [2022-03-18 22:42:42,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:42:42,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-03-18 22:42:42,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:42:42,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-03-18 22:42:42,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2022-03-18 22:42:42,520 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:42:44,006 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2022-03-18 22:42:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 22:42:44,006 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 107 [2022-03-18 22:42:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:42:44,007 INFO L225 Difference]: With dead ends: 135 [2022-03-18 22:42:44,007 INFO L226 Difference]: Without dead ends: 123 [2022-03-18 22:42:44,008 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15273 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5047, Invalid=27173, Unknown=0, NotChecked=0, Total=32220 [2022-03-18 22:42:44,008 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 144 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:42:44,008 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 107 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:42:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-18 22:42:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2022-03-18 22:42:44,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 109 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:42:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2022-03-18 22:42:44,021 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 107 [2022-03-18 22:42:44,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:42:44,021 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2022-03-18 22:42:44,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:44,021 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2022-03-18 22:42:44,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 22:42:44,022 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:42:44,022 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:42:44,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-18 22:42:44,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:44,229 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:42:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:42:44,229 INFO L85 PathProgramCache]: Analyzing trace with hash 365941369, now seen corresponding path program 36 times [2022-03-18 22:42:44,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:42:44,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460129204] [2022-03-18 22:42:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:42:44,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:42:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:44,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:42:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:44,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:42:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:44,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 22:42:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:44,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:42:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460129204] [2022-03-18 22:42:44,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460129204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:42:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048230514] [2022-03-18 22:42:44,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:42:44,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:44,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:42:44,998 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:42:44,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-18 22:42:45,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-03-18 22:42:45,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:42:45,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-18 22:42:45,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:42:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:46,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:42:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:47,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048230514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:42:47,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:42:47,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2022-03-18 22:42:47,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059987618] [2022-03-18 22:42:47,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:42:47,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-03-18 22:42:47,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:42:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-03-18 22:42:47,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2022-03-18 22:42:47,933 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:42:49,415 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2022-03-18 22:42:49,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 22:42:49,416 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 107 [2022-03-18 22:42:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:42:49,416 INFO L225 Difference]: With dead ends: 129 [2022-03-18 22:42:49,416 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 22:42:49,418 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15154 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5047, Invalid=27173, Unknown=0, NotChecked=0, Total=32220 [2022-03-18 22:42:49,418 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 213 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:42:49,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 110 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:42:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 22:42:49,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-03-18 22:42:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 108 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:42:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-03-18 22:42:49,437 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 107 [2022-03-18 22:42:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:42:49,437 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-03-18 22:42:49,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-03-18 22:42:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 22:42:49,438 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:42:49,438 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:42:49,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-18 22:42:49,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:49,651 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:42:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:42:49,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1526240159, now seen corresponding path program 37 times [2022-03-18 22:42:49,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:42:49,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189571102] [2022-03-18 22:42:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:42:49,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:42:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:49,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:42:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:49,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:42:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:49,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 22:42:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:50,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:42:50,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189571102] [2022-03-18 22:42:50,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189571102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:42:50,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199094436] [2022-03-18 22:42:50,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:42:50,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:50,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:42:50,332 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:42:50,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-18 22:42:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:50,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 22:42:50,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:42:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:51,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:42:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:53,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199094436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:42:53,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:42:53,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2022-03-18 22:42:53,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550069505] [2022-03-18 22:42:53,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:42:53,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-03-18 22:42:53,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:42:53,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-03-18 22:42:53,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2022-03-18 22:42:53,721 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:55,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:42:55,540 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2022-03-18 22:42:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 22:42:55,540 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 109 [2022-03-18 22:42:55,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:42:55,541 INFO L225 Difference]: With dead ends: 142 [2022-03-18 22:42:55,541 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 22:42:55,544 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16949 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5501, Invalid=30789, Unknown=0, NotChecked=0, Total=36290 [2022-03-18 22:42:55,544 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 207 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:42:55,544 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 132 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:42:55,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 22:42:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2022-03-18 22:42:55,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 111 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:42:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-03-18 22:42:55,559 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 109 [2022-03-18 22:42:55,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:42:55,559 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-03-18 22:42:55,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:42:55,559 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-03-18 22:42:55,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 22:42:55,560 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:42:55,560 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:42:55,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-18 22:42:55,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-18 22:42:55,766 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:42:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:42:55,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1403075517, now seen corresponding path program 37 times [2022-03-18 22:42:55,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:42:55,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167693851] [2022-03-18 22:42:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:42:55,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:42:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:55,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:42:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:55,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:42:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:56,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 22:42:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:56,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:42:56,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167693851] [2022-03-18 22:42:56,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167693851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:42:56,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171011750] [2022-03-18 22:42:56,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:42:56,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:42:56,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:42:56,593 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:42:56,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-18 22:42:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:42:56,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 22:42:56,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:42:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:58,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:42:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:42:59,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171011750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:42:59,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:42:59,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2022-03-18 22:42:59,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527644350] [2022-03-18 22:42:59,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:42:59,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-03-18 22:42:59,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:42:59,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-03-18 22:42:59,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2022-03-18 22:42:59,881 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:01,552 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2022-03-18 22:43:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 22:43:01,553 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 109 [2022-03-18 22:43:01,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:01,553 INFO L225 Difference]: With dead ends: 137 [2022-03-18 22:43:01,553 INFO L226 Difference]: Without dead ends: 128 [2022-03-18 22:43:01,554 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16970 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5501, Invalid=30789, Unknown=0, NotChecked=0, Total=36290 [2022-03-18 22:43:01,555 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 293 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:01,555 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 90 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:43:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-18 22:43:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2022-03-18 22:43:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 112 states have (on average 1.0535714285714286) internal successors, (118), 114 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:43:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2022-03-18 22:43:01,568 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 109 [2022-03-18 22:43:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:01,568 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2022-03-18 22:43:01,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:01,568 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2022-03-18 22:43:01,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-18 22:43:01,568 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:01,568 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:43:01,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-18 22:43:01,769 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:01,769 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:01,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1790246819, now seen corresponding path program 38 times [2022-03-18 22:43:01,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:01,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157568029] [2022-03-18 22:43:01,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:01,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:01,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:43:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:01,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:43:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:02,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 22:43:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:02,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:02,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157568029] [2022-03-18 22:43:02,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157568029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:43:02,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976300007] [2022-03-18 22:43:02,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:43:02,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:02,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:02,449 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:43:02,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-18 22:43:02,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:43:02,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:43:02,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 22:43:02,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:03,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:43:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:05,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976300007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:43:05,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:43:05,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 140 [2022-03-18 22:43:05,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765191544] [2022-03-18 22:43:05,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:43:05,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-18 22:43:05,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:05,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-18 22:43:05,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3233, Invalid=16227, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 22:43:05,715 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:07,326 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2022-03-18 22:43:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 22:43:07,326 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 111 [2022-03-18 22:43:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:07,327 INFO L225 Difference]: With dead ends: 139 [2022-03-18 22:43:07,327 INFO L226 Difference]: Without dead ends: 127 [2022-03-18 22:43:07,330 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16738 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5505, Invalid=29651, Unknown=0, NotChecked=0, Total=35156 [2022-03-18 22:43:07,330 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:07,330 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 122 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:43:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-18 22:43:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2022-03-18 22:43:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 111 states have (on average 1.045045045045045) internal successors, (116), 113 states have internal predecessors, (116), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:43:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2022-03-18 22:43:07,350 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 111 [2022-03-18 22:43:07,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:07,350 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2022-03-18 22:43:07,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:07,350 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2022-03-18 22:43:07,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-18 22:43:07,351 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:07,351 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:43:07,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-18 22:43:07,565 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:07,565 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:07,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:07,565 INFO L85 PathProgramCache]: Analyzing trace with hash 418488344, now seen corresponding path program 38 times [2022-03-18 22:43:07,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:07,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320467858] [2022-03-18 22:43:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:07,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:07,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:43:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:07,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:43:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:07,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 22:43:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:08,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:08,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320467858] [2022-03-18 22:43:08,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320467858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:43:08,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243185574] [2022-03-18 22:43:08,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:43:08,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:08,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:08,366 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:43:08,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-18 22:43:08,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:43:08,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:43:08,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 22:43:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:09,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:43:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:11,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243185574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:43:11,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:43:11,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 140 [2022-03-18 22:43:11,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129189075] [2022-03-18 22:43:11,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:43:11,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-18 22:43:11,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-18 22:43:11,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3233, Invalid=16227, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 22:43:11,499 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:12,956 INFO L93 Difference]: Finished difference Result 133 states and 136 transitions. [2022-03-18 22:43:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 22:43:12,956 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 111 [2022-03-18 22:43:12,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:12,957 INFO L225 Difference]: With dead ends: 133 [2022-03-18 22:43:12,957 INFO L226 Difference]: Without dead ends: 123 [2022-03-18 22:43:12,959 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16613 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5505, Invalid=29651, Unknown=0, NotChecked=0, Total=35156 [2022-03-18 22:43:12,959 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 190 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:12,959 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 85 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:43:12,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-18 22:43:12,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-03-18 22:43:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 112 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:43:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-03-18 22:43:12,976 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 111 [2022-03-18 22:43:12,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:12,976 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-03-18 22:43:12,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:12,976 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-03-18 22:43:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 22:43:12,977 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:12,977 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:43:13,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-18 22:43:13,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:13,195 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:13,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash 484275582, now seen corresponding path program 39 times [2022-03-18 22:43:13,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:13,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10252802] [2022-03-18 22:43:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:13,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:13,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:43:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:13,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:43:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:13,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 22:43:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:13,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10252802] [2022-03-18 22:43:13,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10252802] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:43:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231444918] [2022-03-18 22:43:13,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:43:13,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:13,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:13,911 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:43:13,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-18 22:43:14,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-18 22:43:14,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:43:14,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 22:43:14,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:15,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:43:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:17,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231444918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:43:17,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:43:17,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 147 [2022-03-18 22:43:17,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069036453] [2022-03-18 22:43:17,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:43:17,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-03-18 22:43:17,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:17,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-03-18 22:43:17,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=17983, Unknown=0, NotChecked=0, Total=21462 [2022-03-18 22:43:17,499 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:19,348 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2022-03-18 22:43:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 22:43:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 113 [2022-03-18 22:43:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:19,350 INFO L225 Difference]: With dead ends: 146 [2022-03-18 22:43:19,350 INFO L226 Difference]: Without dead ends: 135 [2022-03-18 22:43:19,352 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18491 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5977, Invalid=33425, Unknown=0, NotChecked=0, Total=39402 [2022-03-18 22:43:19,353 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 229 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:19,353 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 112 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:43:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-18 22:43:19,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 125. [2022-03-18 22:43:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 115 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:43:19,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-03-18 22:43:19,373 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 113 [2022-03-18 22:43:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:19,373 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-03-18 22:43:19,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-03-18 22:43:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 22:43:19,374 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:19,374 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:43:19,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-18 22:43:19,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-18 22:43:19,591 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:19,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1902325284, now seen corresponding path program 39 times [2022-03-18 22:43:19,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:19,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614043908] [2022-03-18 22:43:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:19,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:19,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:43:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:19,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:43:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:19,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 22:43:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:20,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:20,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614043908] [2022-03-18 22:43:20,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614043908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:43:20,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717321195] [2022-03-18 22:43:20,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:43:20,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:20,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:20,485 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:43:20,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-18 22:43:20,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-18 22:43:20,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:43:20,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 22:43:20,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:22,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:43:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:23,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717321195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:43:23,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:43:23,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 147 [2022-03-18 22:43:23,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800447077] [2022-03-18 22:43:23,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:43:23,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-03-18 22:43:23,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:23,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-03-18 22:43:23,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=17983, Unknown=0, NotChecked=0, Total=21462 [2022-03-18 22:43:23,893 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:25,734 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2022-03-18 22:43:25,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 22:43:25,734 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 113 [2022-03-18 22:43:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:25,735 INFO L225 Difference]: With dead ends: 141 [2022-03-18 22:43:25,735 INFO L226 Difference]: Without dead ends: 132 [2022-03-18 22:43:25,736 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18513 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5977, Invalid=33425, Unknown=0, NotChecked=0, Total=39402 [2022-03-18 22:43:25,736 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 239 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:25,737 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 120 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:43:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-18 22:43:25,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2022-03-18 22:43:25,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 116 states have (on average 1.0517241379310345) internal successors, (122), 118 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:43:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2022-03-18 22:43:25,757 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 113 [2022-03-18 22:43:25,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:25,757 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2022-03-18 22:43:25,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:25,757 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2022-03-18 22:43:25,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 22:43:25,758 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:25,758 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:43:25,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-18 22:43:25,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:25,981 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:25,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:25,982 INFO L85 PathProgramCache]: Analyzing trace with hash -719091198, now seen corresponding path program 40 times [2022-03-18 22:43:25,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:25,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103629351] [2022-03-18 22:43:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:25,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:26,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:43:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:26,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:43:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:26,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 22:43:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:26,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:26,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103629351] [2022-03-18 22:43:26,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103629351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:43:26,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795467184] [2022-03-18 22:43:26,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:43:26,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:26,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:26,720 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:43:26,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-18 22:43:26,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:43:26,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:43:26,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-18 22:43:26,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:28,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:43:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:30,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795467184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:43:30,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:43:30,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 51] total 146 [2022-03-18 22:43:30,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120166772] [2022-03-18 22:43:30,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:43:30,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-03-18 22:43:30,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:30,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-03-18 22:43:30,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3517, Invalid=17653, Unknown=0, NotChecked=0, Total=21170 [2022-03-18 22:43:30,178 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:31,909 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2022-03-18 22:43:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 22:43:31,909 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 115 [2022-03-18 22:43:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:31,910 INFO L225 Difference]: With dead ends: 143 [2022-03-18 22:43:31,910 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 22:43:31,912 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18270 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5983, Invalid=32237, Unknown=0, NotChecked=0, Total=38220 [2022-03-18 22:43:31,912 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 174 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:31,913 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 102 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:43:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 22:43:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2022-03-18 22:43:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 117 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:43:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-03-18 22:43:31,934 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 115 [2022-03-18 22:43:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:31,935 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-03-18 22:43:31,935 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-03-18 22:43:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 22:43:31,936 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:31,936 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:43:31,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-18 22:43:32,156 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:32,157 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:32,157 INFO L85 PathProgramCache]: Analyzing trace with hash -434528905, now seen corresponding path program 40 times [2022-03-18 22:43:32,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:32,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961266490] [2022-03-18 22:43:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:32,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:32,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:43:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:32,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:43:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:32,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-18 22:43:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:33,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:33,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961266490] [2022-03-18 22:43:33,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961266490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:43:33,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510026473] [2022-03-18 22:43:33,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:43:33,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:33,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:33,026 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:43:33,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-18 22:43:33,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:43:33,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:43:33,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-18 22:43:33,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:34,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:43:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:36,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510026473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:43:36,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:43:36,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 51] total 146 [2022-03-18 22:43:36,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979847696] [2022-03-18 22:43:36,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:43:36,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-03-18 22:43:36,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:36,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-03-18 22:43:36,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3517, Invalid=17653, Unknown=0, NotChecked=0, Total=21170 [2022-03-18 22:43:36,384 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:38,032 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-03-18 22:43:38,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 22:43:38,033 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 115 [2022-03-18 22:43:38,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:38,033 INFO L225 Difference]: With dead ends: 137 [2022-03-18 22:43:38,033 INFO L226 Difference]: Without dead ends: 127 [2022-03-18 22:43:38,035 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18139 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5983, Invalid=32237, Unknown=0, NotChecked=0, Total=38220 [2022-03-18 22:43:38,035 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 196 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:38,035 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 105 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:43:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-18 22:43:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-03-18 22:43:38,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 116 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:43:38,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-03-18 22:43:38,053 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 115 [2022-03-18 22:43:38,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:38,053 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-03-18 22:43:38,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-03-18 22:43:38,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-18 22:43:38,054 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:38,054 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:43:38,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-18 22:43:38,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-03-18 22:43:38,255 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1073452829, now seen corresponding path program 41 times [2022-03-18 22:43:38,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:38,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049537003] [2022-03-18 22:43:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:38,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:38,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:43:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:38,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:43:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:38,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-18 22:43:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:39,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:39,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049537003] [2022-03-18 22:43:39,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049537003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:43:39,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103238555] [2022-03-18 22:43:39,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:43:39,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:39,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:39,012 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:43:39,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-18 22:43:39,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-03-18 22:43:39,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:43:39,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 22:43:39,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:40,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:43:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:42,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103238555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:43:42,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:43:42,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 153 [2022-03-18 22:43:42,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288441599] [2022-03-18 22:43:42,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:43:42,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-03-18 22:43:42,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:42,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-03-18 22:43:42,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3773, Invalid=19483, Unknown=0, NotChecked=0, Total=23256 [2022-03-18 22:43:42,880 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:44,806 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2022-03-18 22:43:44,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 22:43:44,807 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 117 [2022-03-18 22:43:44,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:44,807 INFO L225 Difference]: With dead ends: 150 [2022-03-18 22:43:44,807 INFO L226 Difference]: Without dead ends: 139 [2022-03-18 22:43:44,809 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20100 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6473, Invalid=36169, Unknown=0, NotChecked=0, Total=42642 [2022-03-18 22:43:44,809 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:44,809 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 102 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:43:44,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-18 22:43:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2022-03-18 22:43:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 119 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:43:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2022-03-18 22:43:44,828 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 117 [2022-03-18 22:43:44,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:44,828 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2022-03-18 22:43:44,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2022-03-18 22:43:44,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-18 22:43:44,829 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:44,829 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:43:44,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-18 22:43:45,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:45,054 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:45,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:45,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1073059771, now seen corresponding path program 41 times [2022-03-18 22:43:45,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:45,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908992012] [2022-03-18 22:43:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:45,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:45,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:43:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:45,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:43:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:45,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-18 22:43:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:46,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908992012] [2022-03-18 22:43:46,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908992012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:43:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141032136] [2022-03-18 22:43:46,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:43:46,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:46,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:46,007 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:43:46,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-18 22:43:46,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-03-18 22:43:46,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:43:46,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 22:43:46,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:47,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:43:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:49,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141032136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:43:49,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:43:49,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 153 [2022-03-18 22:43:49,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221290183] [2022-03-18 22:43:49,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:43:49,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-03-18 22:43:49,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:49,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-03-18 22:43:49,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3773, Invalid=19483, Unknown=0, NotChecked=0, Total=23256 [2022-03-18 22:43:49,736 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:51,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:51,700 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2022-03-18 22:43:51,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 22:43:51,700 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 117 [2022-03-18 22:43:51,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:51,701 INFO L225 Difference]: With dead ends: 145 [2022-03-18 22:43:51,701 INFO L226 Difference]: Without dead ends: 136 [2022-03-18 22:43:51,704 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20123 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6473, Invalid=36169, Unknown=0, NotChecked=0, Total=42642 [2022-03-18 22:43:51,704 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 227 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:51,704 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 130 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:43:51,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-18 22:43:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2022-03-18 22:43:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 120 states have (on average 1.05) internal successors, (126), 122 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:43:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2022-03-18 22:43:51,729 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 117 [2022-03-18 22:43:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:51,730 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2022-03-18 22:43:51,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2022-03-18 22:43:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-18 22:43:51,730 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:51,731 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:43:51,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-18 22:43:51,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:51,943 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:51,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:51,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1822272479, now seen corresponding path program 42 times [2022-03-18 22:43:51,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:51,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876044557] [2022-03-18 22:43:51,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:51,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:51,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:43:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:51,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:43:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:52,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-18 22:43:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:52,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:52,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876044557] [2022-03-18 22:43:52,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876044557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:43:52,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094762786] [2022-03-18 22:43:52,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:43:52,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:52,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:52,697 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:43:52,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-18 22:43:52,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-03-18 22:43:52,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:43:52,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 22:43:52,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:54,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:43:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:56,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094762786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:43:56,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:43:56,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 53, 53] total 152 [2022-03-18 22:43:56,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616328945] [2022-03-18 22:43:56,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:43:56,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-03-18 22:43:56,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:56,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-03-18 22:43:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3813, Invalid=19139, Unknown=0, NotChecked=0, Total=22952 [2022-03-18 22:43:56,419 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:58,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:58,166 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2022-03-18 22:43:58,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 22:43:58,167 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 119 [2022-03-18 22:43:58,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:58,167 INFO L225 Difference]: With dead ends: 147 [2022-03-18 22:43:58,167 INFO L226 Difference]: Without dead ends: 135 [2022-03-18 22:43:58,170 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19869 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6481, Invalid=34931, Unknown=0, NotChecked=0, Total=41412 [2022-03-18 22:43:58,170 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:58,170 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 92 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:43:58,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-18 22:43:58,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-03-18 22:43:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 121 states have internal predecessors, (124), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:43:58,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-03-18 22:43:58,192 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 119 [2022-03-18 22:43:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:58,192 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-03-18 22:43:58,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-03-18 22:43:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-18 22:43:58,193 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:58,193 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:43:58,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-18 22:43:58,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-18 22:43:58,394 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:58,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1048648342, now seen corresponding path program 42 times [2022-03-18 22:43:58,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:58,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623225658] [2022-03-18 22:43:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:58,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:58,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:43:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:58,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:43:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:58,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 22:43:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:43:59,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:59,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623225658] [2022-03-18 22:43:59,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623225658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:43:59,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924023009] [2022-03-18 22:43:59,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:43:59,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:59,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:59,354 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:43:59,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-18 22:43:59,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-03-18 22:43:59,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:43:59,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 22:43:59,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:00,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:44:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:02,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924023009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:44:02,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:44:02,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 53, 53] total 152 [2022-03-18 22:44:02,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401134131] [2022-03-18 22:44:02,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:44:02,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-03-18 22:44:02,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-03-18 22:44:02,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3813, Invalid=19139, Unknown=0, NotChecked=0, Total=22952 [2022-03-18 22:44:02,903 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:04,630 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2022-03-18 22:44:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 22:44:04,630 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 119 [2022-03-18 22:44:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:04,631 INFO L225 Difference]: With dead ends: 141 [2022-03-18 22:44:04,631 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 22:44:04,633 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19732 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6481, Invalid=34931, Unknown=0, NotChecked=0, Total=41412 [2022-03-18 22:44:04,633 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 223 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:04,633 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 100 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:44:04,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 22:44:04,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-03-18 22:44:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 120 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:44:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-03-18 22:44:04,649 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 119 [2022-03-18 22:44:04,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:04,649 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-03-18 22:44:04,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:04,649 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-03-18 22:44:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 22:44:04,649 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:04,650 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:04,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-18 22:44:04,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:04,850 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:04,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:04,850 INFO L85 PathProgramCache]: Analyzing trace with hash 477644924, now seen corresponding path program 43 times [2022-03-18 22:44:04,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:04,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828041682] [2022-03-18 22:44:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:04,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:04,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:44:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:04,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:44:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:05,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 22:44:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:05,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828041682] [2022-03-18 22:44:05,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828041682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:44:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358402432] [2022-03-18 22:44:05,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:44:05,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:05,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:05,664 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:05,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-18 22:44:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:05,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 22:44:05,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:07,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:44:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:09,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358402432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:44:09,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:44:09,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 159 [2022-03-18 22:44:09,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808687666] [2022-03-18 22:44:09,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:44:09,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-03-18 22:44:09,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:09,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-03-18 22:44:09,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4079, Invalid=21043, Unknown=0, NotChecked=0, Total=25122 [2022-03-18 22:44:09,732 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:11,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:11,875 INFO L93 Difference]: Finished difference Result 154 states and 161 transitions. [2022-03-18 22:44:11,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 22:44:11,876 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2022-03-18 22:44:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:11,876 INFO L225 Difference]: With dead ends: 154 [2022-03-18 22:44:11,876 INFO L226 Difference]: Without dead ends: 143 [2022-03-18 22:44:11,879 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21776 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6989, Invalid=39021, Unknown=0, NotChecked=0, Total=46010 [2022-03-18 22:44:11,879 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 170 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:11,879 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 112 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 22:44:11,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-18 22:44:11,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2022-03-18 22:44:11,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 123 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:44:11,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2022-03-18 22:44:11,895 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 121 [2022-03-18 22:44:11,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:11,896 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2022-03-18 22:44:11,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:11,896 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2022-03-18 22:44:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 22:44:11,896 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:11,896 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:11,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-18 22:44:12,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:12,097 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:12,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:12,097 INFO L85 PathProgramCache]: Analyzing trace with hash 110419290, now seen corresponding path program 43 times [2022-03-18 22:44:12,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:12,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666752418] [2022-03-18 22:44:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:12,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:12,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:44:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:12,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:44:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:12,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 22:44:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:13,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:13,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666752418] [2022-03-18 22:44:13,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666752418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:44:13,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416341180] [2022-03-18 22:44:13,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:44:13,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:13,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:13,101 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:13,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-18 22:44:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:13,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 22:44:13,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:14,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:44:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:17,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416341180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:44:17,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:44:17,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 159 [2022-03-18 22:44:17,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805613899] [2022-03-18 22:44:17,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:44:17,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-03-18 22:44:17,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:17,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-03-18 22:44:17,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4079, Invalid=21043, Unknown=0, NotChecked=0, Total=25122 [2022-03-18 22:44:17,003 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:19,016 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2022-03-18 22:44:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 22:44:19,016 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2022-03-18 22:44:19,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:19,017 INFO L225 Difference]: With dead ends: 149 [2022-03-18 22:44:19,017 INFO L226 Difference]: Without dead ends: 140 [2022-03-18 22:44:19,020 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21800 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6989, Invalid=39021, Unknown=0, NotChecked=0, Total=46010 [2022-03-18 22:44:19,020 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 210 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:19,020 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 80 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:44:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-18 22:44:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2022-03-18 22:44:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 124 states have (on average 1.0483870967741935) internal successors, (130), 126 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:44:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2022-03-18 22:44:19,044 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 121 [2022-03-18 22:44:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:19,044 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2022-03-18 22:44:19,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:19,044 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2022-03-18 22:44:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-18 22:44:19,045 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:19,045 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:19,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-18 22:44:19,270 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:19,271 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:19,271 INFO L85 PathProgramCache]: Analyzing trace with hash 793161216, now seen corresponding path program 44 times [2022-03-18 22:44:19,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:19,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418971699] [2022-03-18 22:44:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:19,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:19,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:44:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:19,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:44:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:19,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 22:44:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:20,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:20,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418971699] [2022-03-18 22:44:20,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418971699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:44:20,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6678223] [2022-03-18 22:44:20,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:44:20,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:20,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:20,095 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:20,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-18 22:44:20,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:44:20,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:44:20,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-18 22:44:20,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:21,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:44:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:24,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6678223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:44:24,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:44:24,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 55, 55] total 158 [2022-03-18 22:44:24,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436359738] [2022-03-18 22:44:24,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:44:24,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-03-18 22:44:24,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:24,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-03-18 22:44:24,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4121, Invalid=20685, Unknown=0, NotChecked=0, Total=24806 [2022-03-18 22:44:24,139 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:26,046 INFO L93 Difference]: Finished difference Result 151 states and 156 transitions. [2022-03-18 22:44:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 22:44:26,047 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2022-03-18 22:44:26,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:26,047 INFO L225 Difference]: With dead ends: 151 [2022-03-18 22:44:26,047 INFO L226 Difference]: Without dead ends: 139 [2022-03-18 22:44:26,051 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21535 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6999, Invalid=37733, Unknown=0, NotChecked=0, Total=44732 [2022-03-18 22:44:26,051 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:26,052 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 92 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:44:26,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-18 22:44:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2022-03-18 22:44:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 125 states have internal predecessors, (128), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:44:26,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2022-03-18 22:44:26,078 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 123 [2022-03-18 22:44:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:26,078 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2022-03-18 22:44:26,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:26,078 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2022-03-18 22:44:26,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-18 22:44:26,079 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:26,079 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:26,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-18 22:44:26,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-03-18 22:44:26,303 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:26,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1926404235, now seen corresponding path program 44 times [2022-03-18 22:44:26,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:26,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337587800] [2022-03-18 22:44:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:26,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:26,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:44:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:26,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:44:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:26,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 22:44:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:27,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:27,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337587800] [2022-03-18 22:44:27,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337587800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:44:27,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769263131] [2022-03-18 22:44:27,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:44:27,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:27,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:27,333 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:27,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-18 22:44:27,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:44:27,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:44:27,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-18 22:44:27,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:29,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:44:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:31,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769263131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:44:31,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:44:31,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 55, 55] total 158 [2022-03-18 22:44:31,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391999989] [2022-03-18 22:44:31,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:44:31,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-03-18 22:44:31,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:31,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-03-18 22:44:31,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4121, Invalid=20685, Unknown=0, NotChecked=0, Total=24806 [2022-03-18 22:44:31,201 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:32,983 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2022-03-18 22:44:32,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 22:44:32,984 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2022-03-18 22:44:32,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:32,984 INFO L225 Difference]: With dead ends: 145 [2022-03-18 22:44:32,984 INFO L226 Difference]: Without dead ends: 135 [2022-03-18 22:44:32,987 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21392 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6999, Invalid=37733, Unknown=0, NotChecked=0, Total=44732 [2022-03-18 22:44:32,987 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 254 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:32,987 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 70 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:44:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-18 22:44:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-03-18 22:44:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 124 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:44:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2022-03-18 22:44:33,003 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 123 [2022-03-18 22:44:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:33,003 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2022-03-18 22:44:33,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2022-03-18 22:44:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-18 22:44:33,004 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:33,004 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:33,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-18 22:44:33,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:33,205 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:33,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1900337563, now seen corresponding path program 45 times [2022-03-18 22:44:33,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:33,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743551156] [2022-03-18 22:44:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:33,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:33,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:44:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:33,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:44:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:33,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 22:44:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:34,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:34,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743551156] [2022-03-18 22:44:34,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743551156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:44:34,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181053747] [2022-03-18 22:44:34,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:44:34,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:34,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:34,092 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:34,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-18 22:44:34,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-03-18 22:44:34,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:44:34,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 22:44:34,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:35,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:44:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:38,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181053747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:44:38,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:44:38,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 165 [2022-03-18 22:44:38,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859545383] [2022-03-18 22:44:38,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:44:38,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-03-18 22:44:38,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:38,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-03-18 22:44:38,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4397, Invalid=22663, Unknown=0, NotChecked=0, Total=27060 [2022-03-18 22:44:38,537 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:40,760 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2022-03-18 22:44:40,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 22:44:40,761 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 125 [2022-03-18 22:44:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:40,761 INFO L225 Difference]: With dead ends: 158 [2022-03-18 22:44:40,762 INFO L226 Difference]: Without dead ends: 147 [2022-03-18 22:44:40,765 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23519 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7525, Invalid=41981, Unknown=0, NotChecked=0, Total=49506 [2022-03-18 22:44:40,765 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:40,765 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 127 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 22:44:40,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-18 22:44:40,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2022-03-18 22:44:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 125 states have (on average 1.04) internal successors, (130), 127 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:44:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2022-03-18 22:44:40,793 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 125 [2022-03-18 22:44:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:40,793 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2022-03-18 22:44:40,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2022-03-18 22:44:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-18 22:44:40,794 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:40,794 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:40,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-18 22:44:40,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:40,994 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:40,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1194324665, now seen corresponding path program 45 times [2022-03-18 22:44:40,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:40,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003997303] [2022-03-18 22:44:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:40,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:41,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:44:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:41,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:44:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:41,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 22:44:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:42,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:42,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003997303] [2022-03-18 22:44:42,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003997303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:44:42,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480837812] [2022-03-18 22:44:42,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:44:42,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:42,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:42,052 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:42,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-18 22:44:42,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-03-18 22:44:42,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:44:42,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 22:44:42,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:43,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:44:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:46,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480837812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:44:46,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:44:46,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 165 [2022-03-18 22:44:46,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338998595] [2022-03-18 22:44:46,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:44:46,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-03-18 22:44:46,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:46,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-03-18 22:44:46,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4397, Invalid=22663, Unknown=0, NotChecked=0, Total=27060 [2022-03-18 22:44:46,157 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:48,141 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-03-18 22:44:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 22:44:48,142 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 125 [2022-03-18 22:44:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:48,143 INFO L225 Difference]: With dead ends: 153 [2022-03-18 22:44:48,143 INFO L226 Difference]: Without dead ends: 144 [2022-03-18 22:44:48,146 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23544 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=7525, Invalid=41981, Unknown=0, NotChecked=0, Total=49506 [2022-03-18 22:44:48,146 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 259 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:48,146 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 75 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:44:48,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-18 22:44:48,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-03-18 22:44:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 128 states have (on average 1.046875) internal successors, (134), 130 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:44:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 145 transitions. [2022-03-18 22:44:48,171 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 145 transitions. Word has length 125 [2022-03-18 22:44:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:48,171 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 145 transitions. [2022-03-18 22:44:48,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 145 transitions. [2022-03-18 22:44:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 22:44:48,172 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:48,172 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:48,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-18 22:44:48,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:48,391 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:48,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1250826337, now seen corresponding path program 46 times [2022-03-18 22:44:48,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:48,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285236435] [2022-03-18 22:44:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:48,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:48,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:44:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:48,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:44:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:48,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 22:44:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:49,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285236435] [2022-03-18 22:44:49,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285236435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:44:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768091842] [2022-03-18 22:44:49,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:44:49,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:49,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:49,218 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:49,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-18 22:44:49,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:44:49,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:44:49,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-18 22:44:49,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:50,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:44:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:53,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768091842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:44:53,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:44:53,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 57, 57] total 164 [2022-03-18 22:44:53,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133251769] [2022-03-18 22:44:53,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:44:53,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-03-18 22:44:53,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:53,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-03-18 22:44:53,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4441, Invalid=22291, Unknown=0, NotChecked=0, Total=26732 [2022-03-18 22:44:53,371 INFO L87 Difference]: Start difference. First operand 140 states and 145 transitions. Second operand has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:55,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:55,354 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2022-03-18 22:44:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 22:44:55,354 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 127 [2022-03-18 22:44:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:55,355 INFO L225 Difference]: With dead ends: 155 [2022-03-18 22:44:55,355 INFO L226 Difference]: Without dead ends: 143 [2022-03-18 22:44:55,358 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23268 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7537, Invalid=40643, Unknown=0, NotChecked=0, Total=48180 [2022-03-18 22:44:55,359 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 166 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:55,359 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 117 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:44:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-18 22:44:55,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2022-03-18 22:44:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 129 states have internal predecessors, (132), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:44:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2022-03-18 22:44:55,384 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 127 [2022-03-18 22:44:55,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:55,384 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2022-03-18 22:44:55,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2022-03-18 22:44:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 22:44:55,385 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:55,385 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:55,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-18 22:44:55,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:55,599 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:55,600 INFO L85 PathProgramCache]: Analyzing trace with hash 871355412, now seen corresponding path program 46 times [2022-03-18 22:44:55,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:55,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944202851] [2022-03-18 22:44:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:55,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:55,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:44:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:55,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:44:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:56,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-18 22:44:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:56,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:56,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944202851] [2022-03-18 22:44:56,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944202851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:44:56,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092019898] [2022-03-18 22:44:56,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:44:56,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:56,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:56,659 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:56,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-18 22:44:56,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:44:56,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:44:56,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-18 22:44:56,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:58,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:45:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:00,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092019898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:45:00,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:45:00,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 57, 57] total 164 [2022-03-18 22:45:00,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321217804] [2022-03-18 22:45:00,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:45:00,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-03-18 22:45:00,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:45:00,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-03-18 22:45:00,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4441, Invalid=22291, Unknown=0, NotChecked=0, Total=26732 [2022-03-18 22:45:00,614 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:02,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:45:02,606 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-03-18 22:45:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 22:45:02,606 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 127 [2022-03-18 22:45:02,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:45:02,607 INFO L225 Difference]: With dead ends: 149 [2022-03-18 22:45:02,607 INFO L226 Difference]: Without dead ends: 139 [2022-03-18 22:45:02,610 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23119 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7537, Invalid=40643, Unknown=0, NotChecked=0, Total=48180 [2022-03-18 22:45:02,610 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 173 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:45:02,610 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 110 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:45:02,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-18 22:45:02,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-03-18 22:45:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 128 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:45:02,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-03-18 22:45:02,627 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 127 [2022-03-18 22:45:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:45:02,628 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-03-18 22:45:02,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-03-18 22:45:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-18 22:45:02,628 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:45:02,628 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:45:02,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-18 22:45:02,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-18 22:45:02,829 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:45:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:45:02,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1897831034, now seen corresponding path program 47 times [2022-03-18 22:45:02,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:45:02,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693797267] [2022-03-18 22:45:02,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:45:02,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:45:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:02,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:45:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:02,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:45:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:03,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-18 22:45:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:03,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:45:03,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693797267] [2022-03-18 22:45:03,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693797267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:45:03,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429411040] [2022-03-18 22:45:03,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:45:03,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:03,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:45:03,713 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:45:03,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-18 22:45:04,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-03-18 22:45:04,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:45:04,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 22:45:04,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:45:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:05,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:45:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:08,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429411040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:45:08,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:45:08,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 171 [2022-03-18 22:45:08,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867585677] [2022-03-18 22:45:08,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:45:08,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-03-18 22:45:08,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:45:08,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-03-18 22:45:08,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4727, Invalid=24343, Unknown=0, NotChecked=0, Total=29070 [2022-03-18 22:45:08,187 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:45:10,472 INFO L93 Difference]: Finished difference Result 162 states and 169 transitions. [2022-03-18 22:45:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 22:45:10,473 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 129 [2022-03-18 22:45:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:45:10,473 INFO L225 Difference]: With dead ends: 162 [2022-03-18 22:45:10,473 INFO L226 Difference]: Without dead ends: 151 [2022-03-18 22:45:10,476 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25329 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8081, Invalid=45049, Unknown=0, NotChecked=0, Total=53130 [2022-03-18 22:45:10,476 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:45:10,476 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 112 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:45:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-18 22:45:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2022-03-18 22:45:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 131 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:45:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2022-03-18 22:45:10,494 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 129 [2022-03-18 22:45:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:45:10,494 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2022-03-18 22:45:10,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2022-03-18 22:45:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-18 22:45:10,495 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:45:10,496 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:45:10,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-18 22:45:10,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-18 22:45:10,707 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:45:10,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:45:10,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2034771928, now seen corresponding path program 47 times [2022-03-18 22:45:10,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:45:10,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040568555] [2022-03-18 22:45:10,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:45:10,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:45:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:10,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:45:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:10,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:45:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:11,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-18 22:45:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:11,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:45:11,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040568555] [2022-03-18 22:45:11,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040568555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:45:11,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070881218] [2022-03-18 22:45:11,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:45:11,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:11,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:45:11,810 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:45:11,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-18 22:45:12,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-03-18 22:45:12,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:45:12,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 22:45:12,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:45:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:13,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:45:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:16,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070881218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:45:16,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:45:16,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 171 [2022-03-18 22:45:16,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629001538] [2022-03-18 22:45:16,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:45:16,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-03-18 22:45:16,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:45:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-03-18 22:45:16,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4727, Invalid=24343, Unknown=0, NotChecked=0, Total=29070 [2022-03-18 22:45:16,064 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:18,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:45:18,469 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2022-03-18 22:45:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 22:45:18,470 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 129 [2022-03-18 22:45:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:45:18,470 INFO L225 Difference]: With dead ends: 157 [2022-03-18 22:45:18,470 INFO L226 Difference]: Without dead ends: 148 [2022-03-18 22:45:18,472 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25355 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8081, Invalid=45049, Unknown=0, NotChecked=0, Total=53130 [2022-03-18 22:45:18,472 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 22:45:18,472 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 155 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 22:45:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-18 22:45:18,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2022-03-18 22:45:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 132 states have (on average 1.0454545454545454) internal successors, (138), 134 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:45:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2022-03-18 22:45:18,496 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 129 [2022-03-18 22:45:18,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:45:18,497 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2022-03-18 22:45:18,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:18,497 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2022-03-18 22:45:18,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-18 22:45:18,497 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:45:18,498 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:45:18,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-18 22:45:18,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-18 22:45:18,711 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:45:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:45:18,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1034858242, now seen corresponding path program 48 times [2022-03-18 22:45:18,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:45:18,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23507927] [2022-03-18 22:45:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:45:18,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:45:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:18,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:45:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:18,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:45:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:19,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-18 22:45:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:19,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:45:19,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23507927] [2022-03-18 22:45:19,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23507927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:45:19,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577809095] [2022-03-18 22:45:19,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:45:19,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:19,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:45:19,602 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:45:19,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-18 22:45:19,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-18 22:45:19,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:45:19,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-18 22:45:19,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:45:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:21,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:45:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:24,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577809095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:45:24,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:45:24,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 59, 59] total 170 [2022-03-18 22:45:24,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831029134] [2022-03-18 22:45:24,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:45:24,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-03-18 22:45:24,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:45:24,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-03-18 22:45:24,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4773, Invalid=23957, Unknown=0, NotChecked=0, Total=28730 [2022-03-18 22:45:24,024 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:26,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:45:26,070 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2022-03-18 22:45:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 22:45:26,070 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 131 [2022-03-18 22:45:26,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:45:26,071 INFO L225 Difference]: With dead ends: 159 [2022-03-18 22:45:26,071 INFO L226 Difference]: Without dead ends: 147 [2022-03-18 22:45:26,075 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25068 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8095, Invalid=43661, Unknown=0, NotChecked=0, Total=51756 [2022-03-18 22:45:26,075 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:45:26,076 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 97 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:45:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-18 22:45:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2022-03-18 22:45:26,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 133 states have internal predecessors, (136), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:45:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2022-03-18 22:45:26,095 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 131 [2022-03-18 22:45:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:45:26,095 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2022-03-18 22:45:26,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2022-03-18 22:45:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-18 22:45:26,096 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:45:26,096 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:45:26,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-18 22:45:26,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:26,308 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:45:26,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:45:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1738166157, now seen corresponding path program 48 times [2022-03-18 22:45:26,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:45:26,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065711832] [2022-03-18 22:45:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:45:26,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:45:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:26,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:45:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:26,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:45:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:26,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-18 22:45:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:27,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:45:27,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065711832] [2022-03-18 22:45:27,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065711832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:45:27,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400534638] [2022-03-18 22:45:27,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:45:27,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:27,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:45:27,418 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:45:27,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-18 22:45:27,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-18 22:45:27,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:45:27,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-18 22:45:27,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:45:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:29,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:45:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:31,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400534638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:45:31,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:45:31,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 59, 59] total 170 [2022-03-18 22:45:31,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454495081] [2022-03-18 22:45:31,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:45:31,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-03-18 22:45:31,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:45:31,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-03-18 22:45:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4773, Invalid=23957, Unknown=0, NotChecked=0, Total=28730 [2022-03-18 22:45:31,640 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:33,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:45:33,669 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2022-03-18 22:45:33,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 22:45:33,669 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 131 [2022-03-18 22:45:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:45:33,670 INFO L225 Difference]: With dead ends: 153 [2022-03-18 22:45:33,670 INFO L226 Difference]: Without dead ends: 143 [2022-03-18 22:45:33,672 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24913 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8095, Invalid=43661, Unknown=0, NotChecked=0, Total=51756 [2022-03-18 22:45:33,672 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 174 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:45:33,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 105 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:45:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-18 22:45:33,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-03-18 22:45:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 132 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:45:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2022-03-18 22:45:33,691 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 131 [2022-03-18 22:45:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:45:33,691 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2022-03-18 22:45:33,691 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:33,691 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2022-03-18 22:45:33,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-18 22:45:33,691 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:45:33,692 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:45:33,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-18 22:45:33,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-18 22:45:33,892 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:45:33,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:45:33,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1886463207, now seen corresponding path program 49 times [2022-03-18 22:45:33,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:45:33,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212571141] [2022-03-18 22:45:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:45:33,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:45:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:33,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:45:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:33,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:45:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:34,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-18 22:45:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:34,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:45:34,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212571141] [2022-03-18 22:45:34,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212571141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:45:34,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111529086] [2022-03-18 22:45:34,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:45:34,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:34,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:45:34,803 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:45:34,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-18 22:45:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 22:45:35,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:45:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:36,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:45:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:39,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111529086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:45:39,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:45:39,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 177 [2022-03-18 22:45:39,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481814880] [2022-03-18 22:45:39,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:45:39,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-03-18 22:45:39,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:45:39,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-03-18 22:45:39,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5069, Invalid=26083, Unknown=0, NotChecked=0, Total=31152 [2022-03-18 22:45:39,514 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:45:41,964 INFO L93 Difference]: Finished difference Result 166 states and 173 transitions. [2022-03-18 22:45:41,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 22:45:41,971 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-03-18 22:45:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:45:41,976 INFO L225 Difference]: With dead ends: 166 [2022-03-18 22:45:41,976 INFO L226 Difference]: Without dead ends: 155 [2022-03-18 22:45:41,979 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27206 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8657, Invalid=48225, Unknown=0, NotChecked=0, Total=56882 [2022-03-18 22:45:41,979 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 213 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 22:45:41,980 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 137 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 22:45:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-18 22:45:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2022-03-18 22:45:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 133 states have (on average 1.037593984962406) internal successors, (138), 135 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:45:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2022-03-18 22:45:42,007 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 133 [2022-03-18 22:45:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:45:42,007 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2022-03-18 22:45:42,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2022-03-18 22:45:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-18 22:45:42,008 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:45:42,008 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:45:42,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-18 22:45:42,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-18 22:45:42,232 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:45:42,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:45:42,232 INFO L85 PathProgramCache]: Analyzing trace with hash 875220151, now seen corresponding path program 49 times [2022-03-18 22:45:42,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:45:42,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651780941] [2022-03-18 22:45:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:45:42,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:45:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:42,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:45:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:42,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:45:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:42,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-18 22:45:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:43,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:45:43,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651780941] [2022-03-18 22:45:43,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651780941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:45:43,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254796909] [2022-03-18 22:45:43,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:45:43,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:43,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:45:43,404 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:45:43,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-18 22:45:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:43,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 22:45:43,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:45:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:45,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:45:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:47,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254796909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:45:47,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:45:47,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 177 [2022-03-18 22:45:47,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039872628] [2022-03-18 22:45:47,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:45:47,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-03-18 22:45:47,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:45:47,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-03-18 22:45:47,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5069, Invalid=26083, Unknown=0, NotChecked=0, Total=31152 [2022-03-18 22:45:47,908 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:45:50,211 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2022-03-18 22:45:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 22:45:50,212 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-03-18 22:45:50,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:45:50,213 INFO L225 Difference]: With dead ends: 161 [2022-03-18 22:45:50,213 INFO L226 Difference]: Without dead ends: 152 [2022-03-18 22:45:50,215 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27233 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8657, Invalid=48225, Unknown=0, NotChecked=0, Total=56882 [2022-03-18 22:45:50,215 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 198 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:45:50,215 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 90 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:45:50,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-18 22:45:50,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2022-03-18 22:45:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 136 states have (on average 1.0441176470588236) internal successors, (142), 138 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:45:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2022-03-18 22:45:50,235 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 133 [2022-03-18 22:45:50,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:45:50,235 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2022-03-18 22:45:50,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:50,235 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2022-03-18 22:45:50,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-18 22:45:50,236 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:45:50,236 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:45:50,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-18 22:45:50,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:50,437 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:45:50,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:45:50,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1327381021, now seen corresponding path program 50 times [2022-03-18 22:45:50,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:45:50,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968395448] [2022-03-18 22:45:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:45:50,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:45:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:50,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:45:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:50,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:45:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:50,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-18 22:45:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:51,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:45:51,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968395448] [2022-03-18 22:45:51,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968395448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:45:51,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329897846] [2022-03-18 22:45:51,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:45:51,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:51,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:45:51,369 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:45:51,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-18 22:45:51,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:45:51,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:45:51,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-18 22:45:51,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:45:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:53,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:45:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:55,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329897846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:45:55,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:45:55,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 61, 61] total 176 [2022-03-18 22:45:55,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948696220] [2022-03-18 22:45:55,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:45:55,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-03-18 22:45:55,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:45:55,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-03-18 22:45:55,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5117, Invalid=25683, Unknown=0, NotChecked=0, Total=30800 [2022-03-18 22:45:55,977 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:45:58,245 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2022-03-18 22:45:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 22:45:58,246 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 135 [2022-03-18 22:45:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:45:58,246 INFO L225 Difference]: With dead ends: 163 [2022-03-18 22:45:58,246 INFO L226 Difference]: Without dead ends: 151 [2022-03-18 22:45:58,250 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26935 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8673, Invalid=46787, Unknown=0, NotChecked=0, Total=55460 [2022-03-18 22:45:58,250 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 195 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 22:45:58,250 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 127 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 22:45:58,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-18 22:45:58,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2022-03-18 22:45:58,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 135 states have (on average 1.037037037037037) internal successors, (140), 137 states have internal predecessors, (140), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:45:58,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2022-03-18 22:45:58,286 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 135 [2022-03-18 22:45:58,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:45:58,286 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2022-03-18 22:45:58,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:45:58,286 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2022-03-18 22:45:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-18 22:45:58,287 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:45:58,287 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:45:58,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-18 22:45:58,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:58,487 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:45:58,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:45:58,488 INFO L85 PathProgramCache]: Analyzing trace with hash -252162926, now seen corresponding path program 50 times [2022-03-18 22:45:58,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:45:58,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886236367] [2022-03-18 22:45:58,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:45:58,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:45:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:58,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:45:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:58,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:45:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:58,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-18 22:45:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:45:59,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:45:59,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886236367] [2022-03-18 22:45:59,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886236367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:45:59,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651828698] [2022-03-18 22:45:59,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:45:59,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:59,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:45:59,653 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:45:59,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-18 22:46:00,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:46:00,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:46:00,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-18 22:46:00,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:46:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:01,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:46:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:04,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651828698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:46:04,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:46:04,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 61, 61] total 176 [2022-03-18 22:46:04,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242292893] [2022-03-18 22:46:04,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:46:04,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-03-18 22:46:04,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:46:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-03-18 22:46:04,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5117, Invalid=25683, Unknown=0, NotChecked=0, Total=30800 [2022-03-18 22:46:04,026 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:46:06,220 INFO L93 Difference]: Finished difference Result 157 states and 160 transitions. [2022-03-18 22:46:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 22:46:06,220 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 135 [2022-03-18 22:46:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:46:06,221 INFO L225 Difference]: With dead ends: 157 [2022-03-18 22:46:06,221 INFO L226 Difference]: Without dead ends: 147 [2022-03-18 22:46:06,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26774 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8673, Invalid=46787, Unknown=0, NotChecked=0, Total=55460 [2022-03-18 22:46:06,224 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 200 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:46:06,224 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 125 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:46:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-18 22:46:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-03-18 22:46:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 136 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:46:06,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2022-03-18 22:46:06,248 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 135 [2022-03-18 22:46:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:46:06,248 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2022-03-18 22:46:06,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2022-03-18 22:46:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-18 22:46:06,248 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:46:06,249 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:46:06,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-18 22:46:06,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-18 22:46:06,449 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:46:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:46:06,449 INFO L85 PathProgramCache]: Analyzing trace with hash 233499512, now seen corresponding path program 51 times [2022-03-18 22:46:06,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:46:06,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169226354] [2022-03-18 22:46:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:46:06,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:46:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:06,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:46:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:06,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:46:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:06,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-18 22:46:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:07,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:46:07,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169226354] [2022-03-18 22:46:07,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169226354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:46:07,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340238513] [2022-03-18 22:46:07,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:46:07,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:46:07,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:46:07,447 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:46:07,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-18 22:46:07,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-18 22:46:07,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:46:07,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 22:46:07,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:46:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:09,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:46:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:12,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340238513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:46:12,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:46:12,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 183 [2022-03-18 22:46:12,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401647166] [2022-03-18 22:46:12,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:46:12,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-03-18 22:46:12,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:46:12,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-03-18 22:46:12,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5423, Invalid=27883, Unknown=0, NotChecked=0, Total=33306 [2022-03-18 22:46:12,400 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:46:14,961 INFO L93 Difference]: Finished difference Result 170 states and 177 transitions. [2022-03-18 22:46:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 22:46:14,961 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 137 [2022-03-18 22:46:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:46:14,962 INFO L225 Difference]: With dead ends: 170 [2022-03-18 22:46:14,962 INFO L226 Difference]: Without dead ends: 159 [2022-03-18 22:46:14,965 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29150 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9253, Invalid=51509, Unknown=0, NotChecked=0, Total=60762 [2022-03-18 22:46:14,966 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 234 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 22:46:14,966 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 142 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1901 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 22:46:14,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-18 22:46:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 149. [2022-03-18 22:46:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 139 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:46:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2022-03-18 22:46:14,985 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 137 [2022-03-18 22:46:14,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:46:14,985 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2022-03-18 22:46:14,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2022-03-18 22:46:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-18 22:46:14,985 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:46:14,985 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:46:15,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-18 22:46:15,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:46:15,186 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:46:15,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:46:15,186 INFO L85 PathProgramCache]: Analyzing trace with hash -68079274, now seen corresponding path program 51 times [2022-03-18 22:46:15,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:46:15,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398261831] [2022-03-18 22:46:15,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:46:15,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:46:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:15,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:46:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:15,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:46:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:15,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-18 22:46:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:16,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:46:16,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398261831] [2022-03-18 22:46:16,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398261831] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:46:16,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108449260] [2022-03-18 22:46:16,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:46:16,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:46:16,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:46:16,415 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:46:16,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-18 22:46:16,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-18 22:46:16,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:46:16,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 22:46:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:46:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:18,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:46:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:21,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108449260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:46:21,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:46:21,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 183 [2022-03-18 22:46:21,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278660953] [2022-03-18 22:46:21,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:46:21,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-03-18 22:46:21,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:46:21,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-03-18 22:46:21,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5423, Invalid=27883, Unknown=0, NotChecked=0, Total=33306 [2022-03-18 22:46:21,173 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:46:23,616 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2022-03-18 22:46:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 22:46:23,616 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 137 [2022-03-18 22:46:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:46:23,617 INFO L225 Difference]: With dead ends: 165 [2022-03-18 22:46:23,617 INFO L226 Difference]: Without dead ends: 156 [2022-03-18 22:46:23,619 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29178 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9253, Invalid=51509, Unknown=0, NotChecked=0, Total=60762 [2022-03-18 22:46:23,619 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 262 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:46:23,620 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 110 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:46:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-18 22:46:23,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2022-03-18 22:46:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 140 states have (on average 1.042857142857143) internal successors, (146), 142 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:46:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 157 transitions. [2022-03-18 22:46:23,639 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 157 transitions. Word has length 137 [2022-03-18 22:46:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:46:23,639 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 157 transitions. [2022-03-18 22:46:23,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:23,640 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 157 transitions. [2022-03-18 22:46:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-18 22:46:23,640 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:46:23,640 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:46:23,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-18 22:46:23,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:46:23,842 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:46:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:46:23,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1054733052, now seen corresponding path program 52 times [2022-03-18 22:46:23,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:46:23,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127821801] [2022-03-18 22:46:23,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:46:23,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:46:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:23,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:46:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:23,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:46:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:24,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-18 22:46:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:24,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:46:24,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127821801] [2022-03-18 22:46:24,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127821801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:46:24,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159269291] [2022-03-18 22:46:24,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:46:24,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:46:24,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:46:24,804 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:46:24,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-18 22:46:25,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:46:25,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:46:25,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-18 22:46:25,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:46:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:26,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:46:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:29,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159269291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:46:29,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:46:29,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 63, 63] total 182 [2022-03-18 22:46:29,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726383647] [2022-03-18 22:46:29,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:46:29,706 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-03-18 22:46:29,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:46:29,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-03-18 22:46:29,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5473, Invalid=27469, Unknown=0, NotChecked=0, Total=32942 [2022-03-18 22:46:29,708 INFO L87 Difference]: Start difference. First operand 152 states and 157 transitions. Second operand has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:46:31,980 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2022-03-18 22:46:31,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 22:46:31,980 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 139 [2022-03-18 22:46:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:46:31,981 INFO L225 Difference]: With dead ends: 167 [2022-03-18 22:46:31,981 INFO L226 Difference]: Without dead ends: 155 [2022-03-18 22:46:31,984 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 161 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28869 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9271, Invalid=50021, Unknown=0, NotChecked=0, Total=59292 [2022-03-18 22:46:31,984 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 179 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:46:31,984 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 127 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:46:31,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-18 22:46:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-03-18 22:46:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 141 states have internal predecessors, (144), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:46:32,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2022-03-18 22:46:32,003 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 139 [2022-03-18 22:46:32,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:46:32,003 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2022-03-18 22:46:32,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:32,004 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2022-03-18 22:46:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-18 22:46:32,004 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:46:32,004 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:46:32,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-18 22:46:32,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-03-18 22:46:32,205 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:46:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:46:32,205 INFO L85 PathProgramCache]: Analyzing trace with hash -774047631, now seen corresponding path program 52 times [2022-03-18 22:46:32,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:46:32,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678276161] [2022-03-18 22:46:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:46:32,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:46:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:32,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:46:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:32,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:46:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:32,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-18 22:46:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:33,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:46:33,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678276161] [2022-03-18 22:46:33,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678276161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:46:33,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131168587] [2022-03-18 22:46:33,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:46:33,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:46:33,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:46:33,414 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:46:33,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-18 22:46:33,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:46:33,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:46:33,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-18 22:46:33,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:46:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:35,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:46:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:38,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131168587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:46:38,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:46:38,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 63, 63] total 182 [2022-03-18 22:46:38,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550585872] [2022-03-18 22:46:38,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:46:38,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-03-18 22:46:38,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:46:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-03-18 22:46:38,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5473, Invalid=27469, Unknown=0, NotChecked=0, Total=32942 [2022-03-18 22:46:38,043 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:40,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:46:40,396 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2022-03-18 22:46:40,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 22:46:40,396 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 139 [2022-03-18 22:46:40,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:46:40,397 INFO L225 Difference]: With dead ends: 161 [2022-03-18 22:46:40,397 INFO L226 Difference]: Without dead ends: 151 [2022-03-18 22:46:40,400 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 161 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28702 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9271, Invalid=50021, Unknown=0, NotChecked=0, Total=59292 [2022-03-18 22:46:40,400 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 217 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 22:46:40,400 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 135 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 22:46:40,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-18 22:46:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-03-18 22:46:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 140 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:46:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-03-18 22:46:40,420 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 139 [2022-03-18 22:46:40,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:46:40,420 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-03-18 22:46:40,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-03-18 22:46:40,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-18 22:46:40,421 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:46:40,421 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:46:40,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-18 22:46:40,621 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:46:40,621 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:46:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:46:40,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1213471639, now seen corresponding path program 53 times [2022-03-18 22:46:40,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:46:40,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658416673] [2022-03-18 22:46:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:46:40,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:46:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:40,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:46:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:40,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:46:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:41,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-18 22:46:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:41,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:46:41,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658416673] [2022-03-18 22:46:41,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658416673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:46:41,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764401048] [2022-03-18 22:46:41,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:46:41,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:46:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:46:41,654 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:46:41,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-18 22:46:42,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-03-18 22:46:42,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:46:42,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 22:46:42,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:46:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:43,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:46:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:46,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764401048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:46:46,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:46:46,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 189 [2022-03-18 22:46:46,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585219642] [2022-03-18 22:46:46,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:46:46,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-03-18 22:46:46,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:46:46,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-03-18 22:46:46,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5789, Invalid=29743, Unknown=0, NotChecked=0, Total=35532 [2022-03-18 22:46:46,882 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:46:49,615 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2022-03-18 22:46:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 22:46:49,616 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 141 [2022-03-18 22:46:49,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:46:49,616 INFO L225 Difference]: With dead ends: 174 [2022-03-18 22:46:49,616 INFO L226 Difference]: Without dead ends: 163 [2022-03-18 22:46:49,619 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31161 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9869, Invalid=54901, Unknown=0, NotChecked=0, Total=64770 [2022-03-18 22:46:49,619 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 233 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 22:46:49,619 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 122 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 22:46:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-18 22:46:49,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 153. [2022-03-18 22:46:49,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.0354609929078014) internal successors, (146), 143 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:46:49,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2022-03-18 22:46:49,640 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 141 [2022-03-18 22:46:49,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:46:49,641 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2022-03-18 22:46:49,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:49,641 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2022-03-18 22:46:49,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-18 22:46:49,641 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:46:49,641 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:46:49,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-18 22:46:49,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-18 22:46:49,842 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:46:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:46:49,842 INFO L85 PathProgramCache]: Analyzing trace with hash -830429771, now seen corresponding path program 53 times [2022-03-18 22:46:49,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:46:49,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355308067] [2022-03-18 22:46:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:46:49,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:46:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:49,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:46:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:49,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:46:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:50,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-18 22:46:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:51,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:46:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355308067] [2022-03-18 22:46:51,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355308067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:46:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045131653] [2022-03-18 22:46:51,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:46:51,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:46:51,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:46:51,200 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:46:51,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-18 22:46:51,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-03-18 22:46:51,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:46:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 22:46:51,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:46:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:53,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:46:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:56,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045131653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:46:56,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:46:56,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 189 [2022-03-18 22:46:56,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401672748] [2022-03-18 22:46:56,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:46:56,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-03-18 22:46:56,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:46:56,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-03-18 22:46:56,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5789, Invalid=29743, Unknown=0, NotChecked=0, Total=35532 [2022-03-18 22:46:56,157 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:46:58,722 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2022-03-18 22:46:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 22:46:58,722 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 141 [2022-03-18 22:46:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:46:58,723 INFO L225 Difference]: With dead ends: 169 [2022-03-18 22:46:58,723 INFO L226 Difference]: Without dead ends: 160 [2022-03-18 22:46:58,726 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31190 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9869, Invalid=54901, Unknown=0, NotChecked=0, Total=64770 [2022-03-18 22:46:58,727 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 221 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:46:58,727 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 105 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:46:58,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-18 22:46:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2022-03-18 22:46:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 144 states have (on average 1.0416666666666667) internal successors, (150), 146 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:46:58,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2022-03-18 22:46:58,749 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 141 [2022-03-18 22:46:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:46:58,749 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2022-03-18 22:46:58,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:46:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2022-03-18 22:46:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-18 22:46:58,749 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:46:58,749 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:46:58,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-18 22:46:58,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:46:58,950 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:46:58,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:46:58,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1419654245, now seen corresponding path program 54 times [2022-03-18 22:46:58,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:46:58,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895906952] [2022-03-18 22:46:58,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:46:58,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:46:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:58,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:46:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:58,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:46:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:59,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-18 22:46:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:46:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:46:59,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:46:59,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895906952] [2022-03-18 22:46:59,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895906952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:46:59,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105466419] [2022-03-18 22:46:59,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:46:59,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:46:59,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:46:59,996 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:46:59,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-18 22:47:00,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-03-18 22:47:00,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:47:00,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-18 22:47:00,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:47:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:02,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:47:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:05,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105466419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:47:05,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:47:05,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 65, 65] total 188 [2022-03-18 22:47:05,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068874802] [2022-03-18 22:47:05,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:47:05,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-03-18 22:47:05,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:47:05,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-03-18 22:47:05,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5841, Invalid=29315, Unknown=0, NotChecked=0, Total=35156 [2022-03-18 22:47:05,134 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:47:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:47:07,450 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2022-03-18 22:47:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 22:47:07,450 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2022-03-18 22:47:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:47:07,451 INFO L225 Difference]: With dead ends: 171 [2022-03-18 22:47:07,451 INFO L226 Difference]: Without dead ends: 159 [2022-03-18 22:47:07,455 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30870 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9889, Invalid=53363, Unknown=0, NotChecked=0, Total=63252 [2022-03-18 22:47:07,455 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:47:07,455 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 92 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:47:07,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-18 22:47:07,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2022-03-18 22:47:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 143 states have (on average 1.034965034965035) internal successors, (148), 145 states have internal predecessors, (148), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:47:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2022-03-18 22:47:07,490 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 143 [2022-03-18 22:47:07,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:47:07,491 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2022-03-18 22:47:07,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:47:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2022-03-18 22:47:07,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-18 22:47:07,492 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:47:07,492 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:47:07,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-18 22:47:07,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-18 22:47:07,707 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:47:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:47:07,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2048197648, now seen corresponding path program 54 times [2022-03-18 22:47:07,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:47:07,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858318599] [2022-03-18 22:47:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:47:07,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:47:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:07,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:47:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:07,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:47:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:08,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 22:47:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:09,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:47:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858318599] [2022-03-18 22:47:09,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858318599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:47:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605242812] [2022-03-18 22:47:09,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:47:09,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:47:09,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:47:09,002 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:47:09,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-18 22:47:09,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-03-18 22:47:09,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:47:09,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-18 22:47:09,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:47:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:11,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:47:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:13,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605242812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:47:13,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:47:13,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 65, 65] total 188 [2022-03-18 22:47:13,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409700258] [2022-03-18 22:47:13,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:47:13,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-03-18 22:47:13,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:47:13,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-03-18 22:47:13,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5841, Invalid=29315, Unknown=0, NotChecked=0, Total=35156 [2022-03-18 22:47:13,812 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:47:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:47:16,207 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2022-03-18 22:47:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 22:47:16,207 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2022-03-18 22:47:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:47:16,208 INFO L225 Difference]: With dead ends: 165 [2022-03-18 22:47:16,208 INFO L226 Difference]: Without dead ends: 155 [2022-03-18 22:47:16,210 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30697 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9889, Invalid=53363, Unknown=0, NotChecked=0, Total=63252 [2022-03-18 22:47:16,210 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:47:16,211 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 120 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:47:16,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-18 22:47:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-03-18 22:47:16,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 142 states have (on average 1.028169014084507) internal successors, (146), 144 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:47:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2022-03-18 22:47:16,231 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 143 [2022-03-18 22:47:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:47:16,232 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2022-03-18 22:47:16,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:47:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2022-03-18 22:47:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-18 22:47:16,232 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:47:16,232 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:47:16,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-18 22:47:16,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-18 22:47:16,435 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:47:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:47:16,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1028146314, now seen corresponding path program 55 times [2022-03-18 22:47:16,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:47:16,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244648348] [2022-03-18 22:47:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:47:16,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:47:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:16,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:47:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:16,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:47:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:16,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 22:47:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:17,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:47:17,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244648348] [2022-03-18 22:47:17,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244648348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:47:17,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205597178] [2022-03-18 22:47:17,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:47:17,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:47:17,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:47:17,504 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:47:17,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-18 22:47:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:17,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 22:47:17,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:47:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:19,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:47:23,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:23,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205597178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:47:23,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:47:23,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 195 [2022-03-18 22:47:23,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930446073] [2022-03-18 22:47:23,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:47:23,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-03-18 22:47:23,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:47:23,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-03-18 22:47:23,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6167, Invalid=31663, Unknown=0, NotChecked=0, Total=37830 [2022-03-18 22:47:23,055 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:47:25,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:47:25,700 INFO L93 Difference]: Finished difference Result 178 states and 185 transitions. [2022-03-18 22:47:25,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 22:47:25,700 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2022-03-18 22:47:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:47:25,701 INFO L225 Difference]: With dead ends: 178 [2022-03-18 22:47:25,701 INFO L226 Difference]: Without dead ends: 167 [2022-03-18 22:47:25,705 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33239 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10505, Invalid=58401, Unknown=0, NotChecked=0, Total=68906 [2022-03-18 22:47:25,705 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 280 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:47:25,705 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 107 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:47:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-18 22:47:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 157. [2022-03-18 22:47:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 147 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:47:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2022-03-18 22:47:25,746 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 145 [2022-03-18 22:47:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:47:25,746 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2022-03-18 22:47:25,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:47:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2022-03-18 22:47:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-18 22:47:25,746 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:47:25,746 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:47:25,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-18 22:47:25,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-18 22:47:25,947 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:47:25,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:47:25,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1888123348, now seen corresponding path program 55 times [2022-03-18 22:47:25,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:47:25,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826714296] [2022-03-18 22:47:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:47:25,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:47:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:25,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:47:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:25,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:47:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:26,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 22:47:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:27,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:47:27,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826714296] [2022-03-18 22:47:27,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826714296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:47:27,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084098246] [2022-03-18 22:47:27,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:47:27,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:47:27,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:47:27,297 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:47:27,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-18 22:47:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:27,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 22:47:27,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:47:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:29,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:47:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:32,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084098246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:47:32,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:47:32,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 195 [2022-03-18 22:47:32,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125481893] [2022-03-18 22:47:32,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:47:32,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-03-18 22:47:32,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:47:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-03-18 22:47:32,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6167, Invalid=31663, Unknown=0, NotChecked=0, Total=37830 [2022-03-18 22:47:32,557 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:47:35,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:47:35,154 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2022-03-18 22:47:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 22:47:35,154 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2022-03-18 22:47:35,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:47:35,155 INFO L225 Difference]: With dead ends: 173 [2022-03-18 22:47:35,155 INFO L226 Difference]: Without dead ends: 164 [2022-03-18 22:47:35,158 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33269 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10505, Invalid=58401, Unknown=0, NotChecked=0, Total=68906 [2022-03-18 22:47:35,158 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 257 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:47:35,158 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 95 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:47:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-18 22:47:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-03-18 22:47:35,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 150 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:47:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 165 transitions. [2022-03-18 22:47:35,180 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 165 transitions. Word has length 145 [2022-03-18 22:47:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:47:35,181 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 165 transitions. [2022-03-18 22:47:35,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:47:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 165 transitions. [2022-03-18 22:47:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-18 22:47:35,181 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:47:35,181 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:47:35,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-18 22:47:35,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-18 22:47:35,383 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:47:35,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:47:35,384 INFO L85 PathProgramCache]: Analyzing trace with hash -230222854, now seen corresponding path program 56 times [2022-03-18 22:47:35,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:47:35,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504729116] [2022-03-18 22:47:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:47:35,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:47:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:35,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:47:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:35,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:47:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:35,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 22:47:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:36,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:47:36,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504729116] [2022-03-18 22:47:36,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504729116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:47:36,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775857546] [2022-03-18 22:47:36,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:47:36,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:47:36,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:47:36,464 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:47:36,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-18 22:47:36,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:47:36,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:47:36,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-18 22:47:36,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:47:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:38,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:47:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:41,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775857546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:47:41,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:47:41,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 67, 67] total 194 [2022-03-18 22:47:41,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077735251] [2022-03-18 22:47:41,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:47:41,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-03-18 22:47:41,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:47:41,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-03-18 22:47:41,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6221, Invalid=31221, Unknown=0, NotChecked=0, Total=37442 [2022-03-18 22:47:41,893 INFO L87 Difference]: Start difference. First operand 160 states and 165 transitions. Second operand has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:47:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:47:44,431 INFO L93 Difference]: Finished difference Result 175 states and 180 transitions. [2022-03-18 22:47:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 22:47:44,432 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 147 [2022-03-18 22:47:44,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:47:44,433 INFO L225 Difference]: With dead ends: 175 [2022-03-18 22:47:44,433 INFO L226 Difference]: Without dead ends: 163 [2022-03-18 22:47:44,436 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32938 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10527, Invalid=56813, Unknown=0, NotChecked=0, Total=67340 [2022-03-18 22:47:44,436 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 178 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:47:44,436 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 122 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:47:44,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-18 22:47:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2022-03-18 22:47:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 147 states have (on average 1.034013605442177) internal successors, (152), 149 states have internal predecessors, (152), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:47:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2022-03-18 22:47:44,460 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 147 [2022-03-18 22:47:44,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:47:44,460 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2022-03-18 22:47:44,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:47:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2022-03-18 22:47:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-18 22:47:44,461 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:47:44,461 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:47:44,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-18 22:47:44,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:47:44,662 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:47:44,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:47:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash -529678481, now seen corresponding path program 56 times [2022-03-18 22:47:44,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:47:44,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768496111] [2022-03-18 22:47:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:47:44,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:47:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:44,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:47:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:44,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:47:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:45,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-18 22:47:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:46,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:47:46,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768496111] [2022-03-18 22:47:46,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768496111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:47:46,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315083242] [2022-03-18 22:47:46,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:47:46,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:47:46,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:47:46,054 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:47:46,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-18 22:47:46,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:47:46,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:47:46,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-18 22:47:46,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:47:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:48,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:47:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:51,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315083242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:47:51,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:47:51,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 67, 67] total 194 [2022-03-18 22:47:51,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783197714] [2022-03-18 22:47:51,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:47:51,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-03-18 22:47:51,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:47:51,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-03-18 22:47:51,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6221, Invalid=31221, Unknown=0, NotChecked=0, Total=37442 [2022-03-18 22:47:51,277 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:47:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:47:53,708 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2022-03-18 22:47:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 22:47:53,708 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 147 [2022-03-18 22:47:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:47:53,709 INFO L225 Difference]: With dead ends: 169 [2022-03-18 22:47:53,709 INFO L226 Difference]: Without dead ends: 159 [2022-03-18 22:47:53,713 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32759 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10527, Invalid=56813, Unknown=0, NotChecked=0, Total=67340 [2022-03-18 22:47:53,713 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 266 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:47:53,713 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 95 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:47:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-18 22:47:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-03-18 22:47:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 148 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:47:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2022-03-18 22:47:53,736 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 147 [2022-03-18 22:47:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:47:53,736 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2022-03-18 22:47:53,736 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:47:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2022-03-18 22:47:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 22:47:53,736 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:47:53,736 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:47:53,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-18 22:47:53,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:47:53,937 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:47:53,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:47:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash -170976491, now seen corresponding path program 57 times [2022-03-18 22:47:53,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:47:53,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45608753] [2022-03-18 22:47:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:47:53,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:47:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:53,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:47:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:53,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:47:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:54,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-18 22:47:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:47:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:55,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:47:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45608753] [2022-03-18 22:47:55,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45608753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:47:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633264277] [2022-03-18 22:47:55,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:47:55,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:47:55,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:47:55,090 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:47:55,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-18 22:47:55,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-03-18 22:47:55,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:47:55,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 22:47:55,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:47:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:47:57,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:48:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:00,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633264277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:48:00,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:48:00,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 201 [2022-03-18 22:48:00,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91360133] [2022-03-18 22:48:00,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:48:00,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-03-18 22:48:00,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:48:00,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-03-18 22:48:00,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=33643, Unknown=0, NotChecked=0, Total=40200 [2022-03-18 22:48:00,988 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:48:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:48:03,747 INFO L93 Difference]: Finished difference Result 182 states and 189 transitions. [2022-03-18 22:48:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-18 22:48:03,748 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 149 [2022-03-18 22:48:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:48:03,748 INFO L225 Difference]: With dead ends: 182 [2022-03-18 22:48:03,748 INFO L226 Difference]: Without dead ends: 171 [2022-03-18 22:48:03,753 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35384 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=11161, Invalid=62009, Unknown=0, NotChecked=0, Total=73170 [2022-03-18 22:48:03,753 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 252 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:48:03,753 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 87 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:48:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-18 22:48:03,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2022-03-18 22:48:03,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 151 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:48:03,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-03-18 22:48:03,776 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 149 [2022-03-18 22:48:03,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:48:03,776 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-03-18 22:48:03,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:48:03,776 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-03-18 22:48:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 22:48:03,776 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:48:03,776 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:48:03,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-18 22:48:03,977 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:48:03,977 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:48:03,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:48:03,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2055994803, now seen corresponding path program 57 times [2022-03-18 22:48:03,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:48:03,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976016271] [2022-03-18 22:48:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:48:03,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:48:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:04,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:48:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:04,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:48:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:04,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-18 22:48:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:05,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:48:05,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976016271] [2022-03-18 22:48:05,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976016271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:48:05,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912169471] [2022-03-18 22:48:05,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:48:05,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:48:05,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:48:05,417 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:48:05,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-18 22:48:05,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-03-18 22:48:05,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:48:05,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 22:48:05,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:48:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:07,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:48:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:10,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912169471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:48:10,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:48:10,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 201 [2022-03-18 22:48:10,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789806102] [2022-03-18 22:48:10,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:48:10,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-03-18 22:48:10,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:48:10,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-03-18 22:48:10,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=33643, Unknown=0, NotChecked=0, Total=40200 [2022-03-18 22:48:10,961 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:48:13,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:48:13,675 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2022-03-18 22:48:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-18 22:48:13,676 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 149 [2022-03-18 22:48:13,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:48:13,676 INFO L225 Difference]: With dead ends: 177 [2022-03-18 22:48:13,676 INFO L226 Difference]: Without dead ends: 168 [2022-03-18 22:48:13,681 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35415 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=11161, Invalid=62009, Unknown=0, NotChecked=0, Total=73170 [2022-03-18 22:48:13,681 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 265 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:48:13,681 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 80 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:48:13,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-18 22:48:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2022-03-18 22:48:13,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.0394736842105263) internal successors, (158), 154 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:48:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 169 transitions. [2022-03-18 22:48:13,720 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 169 transitions. Word has length 149 [2022-03-18 22:48:13,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:48:13,720 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 169 transitions. [2022-03-18 22:48:13,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:48:13,720 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 169 transitions. [2022-03-18 22:48:13,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-18 22:48:13,721 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:48:13,721 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:48:13,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-18 22:48:13,921 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:48:13,921 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:48:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:48:13,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2114511847, now seen corresponding path program 58 times [2022-03-18 22:48:13,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:48:13,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174147835] [2022-03-18 22:48:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:48:13,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:48:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:13,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:48:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:13,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:48:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:14,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-18 22:48:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:15,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:48:15,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174147835] [2022-03-18 22:48:15,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174147835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:48:15,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118919185] [2022-03-18 22:48:15,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:48:15,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:48:15,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:48:15,041 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:48:15,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-18 22:48:15,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:48:15,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:48:15,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-18 22:48:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:48:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:17,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:48:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:20,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118919185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:48:20,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:48:20,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 69, 69] total 200 [2022-03-18 22:48:20,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623468644] [2022-03-18 22:48:20,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:48:20,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-03-18 22:48:20,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:48:20,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-03-18 22:48:20,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6613, Invalid=33187, Unknown=0, NotChecked=0, Total=39800 [2022-03-18 22:48:20,729 INFO L87 Difference]: Start difference. First operand 164 states and 169 transitions. Second operand has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:48:23,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:48:23,226 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2022-03-18 22:48:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 22:48:23,226 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 151 [2022-03-18 22:48:23,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:48:23,227 INFO L225 Difference]: With dead ends: 179 [2022-03-18 22:48:23,227 INFO L226 Difference]: Without dead ends: 167 [2022-03-18 22:48:23,233 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35073 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=11185, Invalid=60371, Unknown=0, NotChecked=0, Total=71556 [2022-03-18 22:48:23,233 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 198 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:48:23,233 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 82 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:48:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-18 22:48:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2022-03-18 22:48:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 151 states have (on average 1.033112582781457) internal successors, (156), 153 states have internal predecessors, (156), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:48:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 167 transitions. [2022-03-18 22:48:23,259 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 167 transitions. Word has length 151 [2022-03-18 22:48:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:48:23,259 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 167 transitions. [2022-03-18 22:48:23,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:48:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 167 transitions. [2022-03-18 22:48:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-18 22:48:23,260 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:48:23,260 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:48:23,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-18 22:48:23,460 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:48:23,461 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:48:23,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:48:23,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2139063666, now seen corresponding path program 58 times [2022-03-18 22:48:23,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:48:23,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383441159] [2022-03-18 22:48:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:48:23,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:48:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:23,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:48:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:23,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:48:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:24,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-18 22:48:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:24,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:48:24,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383441159] [2022-03-18 22:48:24,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383441159] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:48:24,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108159533] [2022-03-18 22:48:24,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:48:24,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:48:24,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:48:24,899 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:48:24,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-18 22:48:25,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:48:25,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:48:25,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-18 22:48:25,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:48:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:27,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:48:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:30,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108159533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:48:30,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:48:30,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 69, 69] total 200 [2022-03-18 22:48:30,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123282953] [2022-03-18 22:48:30,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:48:30,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-03-18 22:48:30,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:48:30,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-03-18 22:48:30,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6613, Invalid=33187, Unknown=0, NotChecked=0, Total=39800 [2022-03-18 22:48:30,360 INFO L87 Difference]: Start difference. First operand 163 states and 167 transitions. Second operand has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:48:32,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:48:32,938 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2022-03-18 22:48:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 22:48:32,938 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 151 [2022-03-18 22:48:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:48:32,939 INFO L225 Difference]: With dead ends: 173 [2022-03-18 22:48:32,939 INFO L226 Difference]: Without dead ends: 163 [2022-03-18 22:48:32,943 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34888 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=11185, Invalid=60371, Unknown=0, NotChecked=0, Total=71556 [2022-03-18 22:48:32,944 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 232 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:48:32,944 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 110 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:48:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-18 22:48:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-03-18 22:48:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 152 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:48:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2022-03-18 22:48:32,967 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 151 [2022-03-18 22:48:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:48:32,968 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2022-03-18 22:48:32,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:48:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2022-03-18 22:48:32,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-18 22:48:32,968 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:48:32,968 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:48:32,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-18 22:48:33,169 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-18 22:48:33,169 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:48:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:48:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash -601912716, now seen corresponding path program 59 times [2022-03-18 22:48:33,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:48:33,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985147053] [2022-03-18 22:48:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:48:33,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:48:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:33,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:48:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:33,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:48:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:33,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-18 22:48:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:34,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:48:34,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985147053] [2022-03-18 22:48:34,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985147053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:48:34,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652703882] [2022-03-18 22:48:34,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:48:34,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:48:34,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:48:34,464 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:48:34,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-18 22:48:34,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-03-18 22:48:34,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:48:34,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 22:48:34,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:48:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:37,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:48:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:40,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652703882] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:48:40,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:48:40,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 207 [2022-03-18 22:48:40,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204206966] [2022-03-18 22:48:40,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:48:40,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2022-03-18 22:48:40,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:48:40,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2022-03-18 22:48:40,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6959, Invalid=35683, Unknown=0, NotChecked=0, Total=42642 [2022-03-18 22:48:40,562 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:48:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:48:43,539 INFO L93 Difference]: Finished difference Result 186 states and 193 transitions. [2022-03-18 22:48:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-18 22:48:43,547 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 153 [2022-03-18 22:48:43,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:48:43,548 INFO L225 Difference]: With dead ends: 186 [2022-03-18 22:48:43,548 INFO L226 Difference]: Without dead ends: 175 [2022-03-18 22:48:43,552 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37596 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=11837, Invalid=65725, Unknown=0, NotChecked=0, Total=77562 [2022-03-18 22:48:43,552 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 250 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 22:48:43,552 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 97 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 22:48:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-18 22:48:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2022-03-18 22:48:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 155 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:48:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2022-03-18 22:48:43,589 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 153 [2022-03-18 22:48:43,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:48:43,589 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2022-03-18 22:48:43,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:48:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2022-03-18 22:48:43,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-18 22:48:43,590 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:48:43,590 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:48:43,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-18 22:48:43,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-18 22:48:43,791 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:48:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:48:43,791 INFO L85 PathProgramCache]: Analyzing trace with hash 634290514, now seen corresponding path program 59 times [2022-03-18 22:48:43,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:48:43,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186485591] [2022-03-18 22:48:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:48:43,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:48:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:43,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:48:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:43,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:48:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:44,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-18 22:48:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:45,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:48:45,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186485591] [2022-03-18 22:48:45,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186485591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:48:45,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542166689] [2022-03-18 22:48:45,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:48:45,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:48:45,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:48:45,286 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:48:45,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-18 22:48:45,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-03-18 22:48:45,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:48:45,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 22:48:45,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:48:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:47,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:48:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:51,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542166689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:48:51,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:48:51,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 207 [2022-03-18 22:48:51,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839088861] [2022-03-18 22:48:51,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:48:51,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2022-03-18 22:48:51,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:48:51,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2022-03-18 22:48:51,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6959, Invalid=35683, Unknown=0, NotChecked=0, Total=42642 [2022-03-18 22:48:51,108 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:48:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:48:54,133 INFO L93 Difference]: Finished difference Result 181 states and 186 transitions. [2022-03-18 22:48:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-18 22:48:54,133 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 153 [2022-03-18 22:48:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:48:54,134 INFO L225 Difference]: With dead ends: 181 [2022-03-18 22:48:54,134 INFO L226 Difference]: Without dead ends: 172 [2022-03-18 22:48:54,137 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37628 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=11837, Invalid=65725, Unknown=0, NotChecked=0, Total=77562 [2022-03-18 22:48:54,137 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 321 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 22:48:54,138 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 120 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 22:48:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-18 22:48:54,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2022-03-18 22:48:54,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.0384615384615385) internal successors, (162), 158 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:48:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2022-03-18 22:48:54,163 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 153 [2022-03-18 22:48:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:48:54,163 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2022-03-18 22:48:54,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:48:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2022-03-18 22:48:54,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-18 22:48:54,164 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:48:54,164 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:48:54,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-18 22:48:54,389 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-18 22:48:54,390 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:48:54,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:48:54,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1722233848, now seen corresponding path program 60 times [2022-03-18 22:48:54,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:48:54,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680226378] [2022-03-18 22:48:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:48:54,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:48:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:54,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:48:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:54,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:48:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:54,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-18 22:48:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:48:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:55,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:48:55,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680226378] [2022-03-18 22:48:55,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680226378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:48:55,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781637277] [2022-03-18 22:48:55,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:48:55,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:48:55,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:48:55,591 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:48:55,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-18 22:48:56,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-03-18 22:48:56,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:48:56,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-18 22:48:56,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:48:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:48:58,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:49:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:01,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781637277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:49:01,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:49:01,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 71, 71] total 206 [2022-03-18 22:49:01,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010370483] [2022-03-18 22:49:01,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:49:01,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2022-03-18 22:49:01,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:49:01,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2022-03-18 22:49:01,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7017, Invalid=35213, Unknown=0, NotChecked=0, Total=42230 [2022-03-18 22:49:01,591 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:49:04,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:49:04,336 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2022-03-18 22:49:04,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-18 22:49:04,336 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 155 [2022-03-18 22:49:04,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:49:04,337 INFO L225 Difference]: With dead ends: 183 [2022-03-18 22:49:04,337 INFO L226 Difference]: Without dead ends: 171 [2022-03-18 22:49:04,341 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37275 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=11863, Invalid=64037, Unknown=0, NotChecked=0, Total=75900 [2022-03-18 22:49:04,341 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 301 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:49:04,342 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 97 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:49:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-18 22:49:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2022-03-18 22:49:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 155 states have (on average 1.032258064516129) internal successors, (160), 157 states have internal predecessors, (160), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:49:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 171 transitions. [2022-03-18 22:49:04,366 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 171 transitions. Word has length 155 [2022-03-18 22:49:04,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:49:04,367 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 171 transitions. [2022-03-18 22:49:04,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:49:04,367 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 171 transitions. [2022-03-18 22:49:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-18 22:49:04,367 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:49:04,367 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:49:04,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-18 22:49:04,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-18 22:49:04,568 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:49:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:49:04,568 INFO L85 PathProgramCache]: Analyzing trace with hash -407730835, now seen corresponding path program 60 times [2022-03-18 22:49:04,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:49:04,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615065030] [2022-03-18 22:49:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:49:04,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:49:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:04,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:49:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:04,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:49:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:05,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-18 22:49:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:06,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:49:06,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615065030] [2022-03-18 22:49:06,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615065030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:49:06,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703954514] [2022-03-18 22:49:06,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:49:06,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:49:06,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:49:06,092 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:49:06,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-18 22:49:06,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-03-18 22:49:06,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:49:06,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-18 22:49:06,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:49:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:08,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:49:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:11,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703954514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:49:11,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:49:11,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 71, 71] total 206 [2022-03-18 22:49:11,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280459478] [2022-03-18 22:49:11,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:49:11,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2022-03-18 22:49:11,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:49:11,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2022-03-18 22:49:11,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7017, Invalid=35213, Unknown=0, NotChecked=0, Total=42230 [2022-03-18 22:49:11,779 INFO L87 Difference]: Start difference. First operand 167 states and 171 transitions. Second operand has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:49:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:49:14,548 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2022-03-18 22:49:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-18 22:49:14,548 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 155 [2022-03-18 22:49:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:49:14,549 INFO L225 Difference]: With dead ends: 177 [2022-03-18 22:49:14,549 INFO L226 Difference]: Without dead ends: 167 [2022-03-18 22:49:14,554 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37084 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=11863, Invalid=64037, Unknown=0, NotChecked=0, Total=75900 [2022-03-18 22:49:14,554 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 226 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 22:49:14,554 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 115 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 22:49:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-18 22:49:14,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-03-18 22:49:14,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 154 states have (on average 1.025974025974026) internal successors, (158), 156 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:49:14,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2022-03-18 22:49:14,579 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 155 [2022-03-18 22:49:14,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:49:14,580 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2022-03-18 22:49:14,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:49:14,580 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2022-03-18 22:49:14,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-18 22:49:14,581 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:49:14,581 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:49:14,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-18 22:49:14,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:49:14,783 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:49:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:49:14,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1056594323, now seen corresponding path program 61 times [2022-03-18 22:49:14,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:49:14,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496088396] [2022-03-18 22:49:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:49:14,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:49:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:14,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:49:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:14,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:49:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:15,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-18 22:49:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:16,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:49:16,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496088396] [2022-03-18 22:49:16,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496088396] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:49:16,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47849807] [2022-03-18 22:49:16,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:49:16,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:49:16,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:49:16,038 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:49:16,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-18 22:49:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:16,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 22:49:16,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:49:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:18,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:49:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:22,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47849807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:49:22,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:49:22,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 213 [2022-03-18 22:49:22,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133007207] [2022-03-18 22:49:22,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:49:22,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-03-18 22:49:22,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:49:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-03-18 22:49:22,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7373, Invalid=37783, Unknown=0, NotChecked=0, Total=45156 [2022-03-18 22:49:22,421 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:49:25,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:49:25,325 INFO L93 Difference]: Finished difference Result 190 states and 197 transitions. [2022-03-18 22:49:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-18 22:49:25,326 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 157 [2022-03-18 22:49:25,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:49:25,326 INFO L225 Difference]: With dead ends: 190 [2022-03-18 22:49:25,326 INFO L226 Difference]: Without dead ends: 179 [2022-03-18 22:49:25,330 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39875 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=12533, Invalid=69549, Unknown=0, NotChecked=0, Total=82082 [2022-03-18 22:49:25,331 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 346 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:49:25,331 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 77 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:49:25,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-18 22:49:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 169. [2022-03-18 22:49:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 159 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:49:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2022-03-18 22:49:25,360 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 157 [2022-03-18 22:49:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:49:25,360 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2022-03-18 22:49:25,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:49:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2022-03-18 22:49:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-18 22:49:25,361 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:49:25,361 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:49:25,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-18 22:49:25,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:49:25,563 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:49:25,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:49:25,564 INFO L85 PathProgramCache]: Analyzing trace with hash -647539535, now seen corresponding path program 61 times [2022-03-18 22:49:25,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:49:25,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755650413] [2022-03-18 22:49:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:49:25,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:49:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:25,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:49:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:25,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:49:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:26,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-18 22:49:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:27,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:49:27,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755650413] [2022-03-18 22:49:27,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755650413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:49:27,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766478795] [2022-03-18 22:49:27,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:49:27,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:49:27,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:49:27,148 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:49:27,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-18 22:49:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:27,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 22:49:27,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:49:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:29,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:49:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:33,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766478795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:49:33,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:49:33,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 213 [2022-03-18 22:49:33,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189453020] [2022-03-18 22:49:33,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:49:33,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-03-18 22:49:33,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:49:33,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-03-18 22:49:33,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7373, Invalid=37783, Unknown=0, NotChecked=0, Total=45156 [2022-03-18 22:49:33,197 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:49:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:49:36,289 INFO L93 Difference]: Finished difference Result 185 states and 190 transitions. [2022-03-18 22:49:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-18 22:49:36,289 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 157 [2022-03-18 22:49:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:49:36,290 INFO L225 Difference]: With dead ends: 185 [2022-03-18 22:49:36,290 INFO L226 Difference]: Without dead ends: 176 [2022-03-18 22:49:36,293 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39908 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=12533, Invalid=69549, Unknown=0, NotChecked=0, Total=82082 [2022-03-18 22:49:36,293 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 212 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 22:49:36,294 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 95 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 22:49:36,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-18 22:49:36,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2022-03-18 22:49:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 160 states have (on average 1.0375) internal successors, (166), 162 states have internal predecessors, (166), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:49:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 177 transitions. [2022-03-18 22:49:36,321 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 177 transitions. Word has length 157 [2022-03-18 22:49:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:49:36,321 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 177 transitions. [2022-03-18 22:49:36,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:49:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 177 transitions. [2022-03-18 22:49:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-18 22:49:36,322 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:49:36,322 INFO L500 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:49:36,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-18 22:49:36,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-18 22:49:36,523 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:49:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:49:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1755796585, now seen corresponding path program 62 times [2022-03-18 22:49:36,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:49:36,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307681426] [2022-03-18 22:49:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:49:36,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:49:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:36,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:49:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:36,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:49:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:37,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-18 22:49:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:37,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:49:37,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307681426] [2022-03-18 22:49:37,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307681426] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:49:37,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547789549] [2022-03-18 22:49:37,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:49:37,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:49:37,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:49:37,741 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:49:37,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-18 22:49:38,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:49:38,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:49:38,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-18 22:49:38,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:49:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:40,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:49:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:44,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547789549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:49:44,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:49:44,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 73, 73] total 212 [2022-03-18 22:49:44,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098994915] [2022-03-18 22:49:44,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:49:44,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2022-03-18 22:49:44,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:49:44,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2022-03-18 22:49:44,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7433, Invalid=37299, Unknown=0, NotChecked=0, Total=44732 [2022-03-18 22:49:44,255 INFO L87 Difference]: Start difference. First operand 172 states and 177 transitions. Second operand has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:49:47,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:49:47,099 INFO L93 Difference]: Finished difference Result 187 states and 192 transitions. [2022-03-18 22:49:47,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-18 22:49:47,099 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 159 [2022-03-18 22:49:47,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:49:47,100 INFO L225 Difference]: With dead ends: 187 [2022-03-18 22:49:47,100 INFO L226 Difference]: Without dead ends: 175 [2022-03-18 22:49:47,105 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 181 SyntacticMatches, 5 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39544 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=12561, Invalid=67811, Unknown=0, NotChecked=0, Total=80372 [2022-03-18 22:49:47,105 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 156 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:49:47,105 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 112 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:49:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-18 22:49:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2022-03-18 22:49:47,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 161 states have internal predecessors, (164), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:49:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2022-03-18 22:49:47,152 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 159 [2022-03-18 22:49:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:49:47,152 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2022-03-18 22:49:47,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:49:47,152 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2022-03-18 22:49:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-18 22:49:47,153 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:49:47,153 INFO L500 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:49:47,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-18 22:49:47,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-18 22:49:47,353 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:49:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:49:47,354 INFO L85 PathProgramCache]: Analyzing trace with hash 37040140, now seen corresponding path program 62 times [2022-03-18 22:49:47,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:49:47,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192110210] [2022-03-18 22:49:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:49:47,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:49:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:47,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:49:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:47,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:49:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:47,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-18 22:49:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:48,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:49:48,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192110210] [2022-03-18 22:49:48,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192110210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:49:48,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964446778] [2022-03-18 22:49:48,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:49:48,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:49:48,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:49:48,944 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:49:48,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-18 22:49:49,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:49:49,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:49:49,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-18 22:49:49,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:49:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:51,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:49:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:54,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964446778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:49:54,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:49:54,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 73, 73] total 212 [2022-03-18 22:49:54,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073560258] [2022-03-18 22:49:54,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:49:54,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2022-03-18 22:49:54,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:49:54,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2022-03-18 22:49:54,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7433, Invalid=37299, Unknown=0, NotChecked=0, Total=44732 [2022-03-18 22:49:54,947 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:49:58,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:49:58,103 INFO L93 Difference]: Finished difference Result 181 states and 184 transitions. [2022-03-18 22:49:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-18 22:49:58,104 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 159 [2022-03-18 22:49:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:49:58,104 INFO L225 Difference]: With dead ends: 181 [2022-03-18 22:49:58,104 INFO L226 Difference]: Without dead ends: 171 [2022-03-18 22:49:58,107 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 181 SyntacticMatches, 5 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39347 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=12561, Invalid=67811, Unknown=0, NotChecked=0, Total=80372 [2022-03-18 22:49:58,107 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 224 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 22:49:58,107 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 145 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2414 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 22:49:58,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-18 22:49:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-03-18 22:49:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 160 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 22:49:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2022-03-18 22:49:58,147 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 159 [2022-03-18 22:49:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:49:58,147 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2022-03-18 22:49:58,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:49:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2022-03-18 22:49:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-18 22:49:58,148 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:49:58,148 INFO L500 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:49:58,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-18 22:49:58,374 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:49:58,374 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:49:58,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:49:58,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1015228302, now seen corresponding path program 63 times [2022-03-18 22:49:58,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:49:58,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603637764] [2022-03-18 22:49:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:49:58,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:49:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:58,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:49:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:58,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:49:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:59,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-18 22:49:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:49:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:49:59,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:49:59,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603637764] [2022-03-18 22:49:59,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603637764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:49:59,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844311833] [2022-03-18 22:49:59,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:49:59,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:49:59,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:49:59,661 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:49:59,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-18 22:50:00,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-03-18 22:50:00,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:50:00,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 22:50:00,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:50:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:50:02,558 INFO L328 TraceCheckSpWp]: Computing backward predicates...