/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/pnr5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 22:28:05,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 22:28:05,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 22:28:05,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-30 22:28:05,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-30 22:28:05,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-30 22:28:05,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-30 22:28:05,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-30 22:28:05,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-30 22:28:05,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-30 22:28:05,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-30 22:28:05,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-30 22:28:05,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-30 22:28:05,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-30 22:28:05,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-30 22:28:05,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-30 22:28:05,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-30 22:28:05,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-30 22:28:05,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-30 22:28:05,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-30 22:28:05,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-30 22:28:05,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-30 22:28:05,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-30 22:28:05,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-30 22:28:05,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-30 22:28:05,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-30 22:28:05,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-30 22:28:05,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-30 22:28:05,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-30 22:28:05,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-30 22:28:05,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-30 22:28:05,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-30 22:28:05,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-30 22:28:05,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-30 22:28:05,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-30 22:28:05,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-30 22:28:05,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-30 22:28:05,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-30 22:28:05,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-30 22:28:05,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-30 22:28:05,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-30 22:28:05,270 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 22:28:05,292 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 22:28:05,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 22:28:05,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 22:28:05,293 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 22:28:05,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 22:28:05,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 22:28:05,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 22:28:05,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 22:28:05,294 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 22:28:05,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 22:28:05,294 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 22:28:05,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 22:28:05,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 22:28:05,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 22:28:05,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 22:28:05,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 22:28:05,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 22:28:05,295 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 22:28:05,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 22:28:05,296 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 22:28:05,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 22:28:05,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 22:28:05,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 22:28:05,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 22:28:05,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:28:05,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 22:28:05,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 22:28:05,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 22:28:05,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 22:28:05,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 22:28:05,297 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 22:28:05,297 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 22:28:05,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 22:28:05,297 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 22:28:05,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 22:28:05,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 22:28:05,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 22:28:05,534 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 22:28:05,536 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 22:28:05,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pnr5.c [2022-01-30 22:28:05,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3658db5b9/a02ae5da8ceb40bdb56868556c7ca680/FLAG2ef2cd202 [2022-01-30 22:28:05,905 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 22:28:05,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr5.c [2022-01-30 22:28:05,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3658db5b9/a02ae5da8ceb40bdb56868556c7ca680/FLAG2ef2cd202 [2022-01-30 22:28:06,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3658db5b9/a02ae5da8ceb40bdb56868556c7ca680 [2022-01-30 22:28:06,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 22:28:06,338 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 22:28:06,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 22:28:06,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 22:28:06,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 22:28:06,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:28:06" (1/1) ... [2022-01-30 22:28:06,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6135702b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:06, skipping insertion in model container [2022-01-30 22:28:06,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:28:06" (1/1) ... [2022-01-30 22:28:06,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 22:28:06,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 22:28:06,476 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr5.c[395,408] [2022-01-30 22:28:06,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:28:06,527 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 22:28:06,542 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr5.c[395,408] [2022-01-30 22:28:06,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:28:06,562 INFO L208 MainTranslator]: Completed translation [2022-01-30 22:28:06,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:06 WrapperNode [2022-01-30 22:28:06,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 22:28:06,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 22:28:06,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 22:28:06,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 22:28:06,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:06" (1/1) ... [2022-01-30 22:28:06,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:06" (1/1) ... [2022-01-30 22:28:06,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:06" (1/1) ... [2022-01-30 22:28:06,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:06" (1/1) ... [2022-01-30 22:28:06,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:06" (1/1) ... [2022-01-30 22:28:06,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:06" (1/1) ... [2022-01-30 22:28:06,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:06" (1/1) ... [2022-01-30 22:28:06,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 22:28:06,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 22:28:06,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 22:28:06,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 22:28:06,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:06" (1/1) ... [2022-01-30 22:28:06,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:28:06,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:06,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-30 22:28:06,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-30 22:28:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 22:28:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 22:28:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 22:28:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-30 22:28:06,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 22:28:06,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-01-30 22:28:06,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 22:28:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 22:28:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 22:28:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 22:28:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 22:28:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-30 22:28:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 22:28:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 22:28:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-30 22:28:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-01-30 22:28:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 22:28:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-30 22:28:06,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 22:28:06,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 22:28:06,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 22:28:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 22:28:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 22:28:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 22:28:06,748 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 22:28:06,749 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 22:28:06,895 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 22:28:06,901 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 22:28:06,901 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-30 22:28:06,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:28:06 BoogieIcfgContainer [2022-01-30 22:28:06,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 22:28:06,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 22:28:06,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 22:28:06,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 22:28:06,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 10:28:06" (1/3) ... [2022-01-30 22:28:06,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@375c4b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:28:06, skipping insertion in model container [2022-01-30 22:28:06,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:06" (2/3) ... [2022-01-30 22:28:06,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@375c4b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:28:06, skipping insertion in model container [2022-01-30 22:28:06,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:28:06" (3/3) ... [2022-01-30 22:28:06,918 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr5.c [2022-01-30 22:28:06,922 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 22:28:06,922 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 22:28:07,005 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 22:28:07,011 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 22:28:07,011 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 22:28:07,037 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 34 states have (on average 1.411764705882353) internal successors, (48), 35 states have internal predecessors, (48), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-30 22:28:07,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-30 22:28:07,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:07,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:07,045 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:07,055 INFO L85 PathProgramCache]: Analyzing trace with hash -24338033, now seen corresponding path program 1 times [2022-01-30 22:28:07,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:07,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144228918] [2022-01-30 22:28:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:07,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:07,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:07,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:28:07,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:07,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144228918] [2022-01-30 22:28:07,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144228918] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:28:07,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:28:07,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 22:28:07,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848535824] [2022-01-30 22:28:07,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:28:07,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:28:07,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:07,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:28:07,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:28:07,354 INFO L87 Difference]: Start difference. First operand has 50 states, 34 states have (on average 1.411764705882353) internal successors, (48), 35 states have internal predecessors, (48), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:28:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:07,464 INFO L93 Difference]: Finished difference Result 89 states and 119 transitions. [2022-01-30 22:28:07,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:28:07,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-01-30 22:28:07,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:07,473 INFO L225 Difference]: With dead ends: 89 [2022-01-30 22:28:07,473 INFO L226 Difference]: Without dead ends: 45 [2022-01-30 22:28:07,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:28:07,480 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:07,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 66 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:28:07,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-30 22:28:07,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-01-30 22:28:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-30 22:28:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-01-30 22:28:07,515 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 21 [2022-01-30 22:28:07,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:07,516 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-01-30 22:28:07,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:28:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-01-30 22:28:07,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-30 22:28:07,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:07,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:07,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 22:28:07,518 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:07,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:07,519 INFO L85 PathProgramCache]: Analyzing trace with hash -606233436, now seen corresponding path program 1 times [2022-01-30 22:28:07,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:07,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059348531] [2022-01-30 22:28:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:07,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:07,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:07,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:28:07,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:07,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059348531] [2022-01-30 22:28:07,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059348531] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:28:07,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:28:07,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-30 22:28:07,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854522921] [2022-01-30 22:28:07,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:28:07,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-30 22:28:07,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:07,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-30 22:28:07,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:28:07,705 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:28:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:07,923 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2022-01-30 22:28:07,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:28:07,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-01-30 22:28:07,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:07,927 INFO L225 Difference]: With dead ends: 73 [2022-01-30 22:28:07,927 INFO L226 Difference]: Without dead ends: 62 [2022-01-30 22:28:07,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-30 22:28:07,936 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 100 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:07,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 49 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:28:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-30 22:28:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-01-30 22:28:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-30 22:28:07,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-01-30 22:28:07,960 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 21 [2022-01-30 22:28:07,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:07,961 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-01-30 22:28:07,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:28:07,961 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-01-30 22:28:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-30 22:28:07,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:07,965 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:07,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 22:28:07,966 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash 660988682, now seen corresponding path program 1 times [2022-01-30 22:28:07,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:07,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634404303] [2022-01-30 22:28:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:07,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:08,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:08,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:08,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:08,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:08,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:08,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:08,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:28:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:28:08,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:08,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634404303] [2022-01-30 22:28:08,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634404303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:08,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867344838] [2022-01-30 22:28:08,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:08,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:08,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:08,467 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) [2022-01-30 22:28:08,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 22:28:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:08,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 22:28:08,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:08,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:28:08,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:08,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:28:08,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:08,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:28:08,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:08,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:28:08,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:08,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-01-30 22:28:08,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-30 22:28:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:28:09,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:09,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-01-30 22:28:09,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-01-30 22:28:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:28:09,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867344838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:09,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:28:09,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 16 [2022-01-30 22:28:09,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812220268] [2022-01-30 22:28:09,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:09,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 22:28:09,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:09,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 22:28:09,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:28:09,308 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 13 states have internal predecessors, (52), 7 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-01-30 22:28:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:09,840 INFO L93 Difference]: Finished difference Result 131 states and 184 transitions. [2022-01-30 22:28:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-30 22:28:09,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 13 states have internal predecessors, (52), 7 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 53 [2022-01-30 22:28:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:09,843 INFO L225 Difference]: With dead ends: 131 [2022-01-30 22:28:09,843 INFO L226 Difference]: Without dead ends: 129 [2022-01-30 22:28:09,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-30 22:28:09,844 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 136 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:09,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 259 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 22:28:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-30 22:28:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 70. [2022-01-30 22:28:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-30 22:28:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2022-01-30 22:28:09,861 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 53 [2022-01-30 22:28:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:09,861 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2022-01-30 22:28:09,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 13 states have internal predecessors, (52), 7 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-01-30 22:28:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2022-01-30 22:28:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-30 22:28:09,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:09,863 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:09,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:10,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:10,089 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:10,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:10,090 INFO L85 PathProgramCache]: Analyzing trace with hash 588602124, now seen corresponding path program 1 times [2022-01-30 22:28:10,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:10,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188869283] [2022-01-30 22:28:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:10,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:10,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:10,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:10,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:10,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:10,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:10,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:10,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:28:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:28:10,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:10,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188869283] [2022-01-30 22:28:10,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188869283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:10,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970362655] [2022-01-30 22:28:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:10,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:10,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:10,329 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) [2022-01-30 22:28:10,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 22:28:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:10,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-30 22:28:10,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:10,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:28:10,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:10,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:10,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:10,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:10,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:10,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:10,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:10,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-30 22:28:10,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 22:28:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-30 22:28:11,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:11,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-30 22:28:11,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-01-30 22:28:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:28:11,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970362655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:11,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:28:11,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2022-01-30 22:28:11,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148959598] [2022-01-30 22:28:11,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:11,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-30 22:28:11,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:11,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-30 22:28:11,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-30 22:28:11,372 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 12 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-30 22:28:12,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:12,420 INFO L93 Difference]: Finished difference Result 188 states and 264 transitions. [2022-01-30 22:28:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 22:28:12,421 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 12 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) Word has length 53 [2022-01-30 22:28:12,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:12,424 INFO L225 Difference]: With dead ends: 188 [2022-01-30 22:28:12,424 INFO L226 Difference]: Without dead ends: 186 [2022-01-30 22:28:12,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=1333, Unknown=0, NotChecked=0, Total=1560 [2022-01-30 22:28:12,426 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 126 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:12,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 609 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1224 Invalid, 0 Unknown, 124 Unchecked, 0.7s Time] [2022-01-30 22:28:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-30 22:28:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 103. [2022-01-30 22:28:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 71 states have (on average 1.323943661971831) internal successors, (94), 73 states have internal predecessors, (94), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-30 22:28:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 143 transitions. [2022-01-30 22:28:12,460 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 143 transitions. Word has length 53 [2022-01-30 22:28:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:12,460 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 143 transitions. [2022-01-30 22:28:12,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 12 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-30 22:28:12,461 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 143 transitions. [2022-01-30 22:28:12,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-30 22:28:12,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:12,463 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:12,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:12,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-30 22:28:12,677 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:12,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:12,678 INFO L85 PathProgramCache]: Analyzing trace with hash -317904153, now seen corresponding path program 1 times [2022-01-30 22:28:12,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:12,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347522479] [2022-01-30 22:28:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:12,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:12,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:12,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:12,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:12,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:12,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:12,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:12,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:28:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:12,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-30 22:28:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:28:12,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:12,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347522479] [2022-01-30 22:28:12,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347522479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:12,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552837801] [2022-01-30 22:28:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:12,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:12,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:12,895 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) [2022-01-30 22:28:12,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 22:28:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:12,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 22:28:12,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:13,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:28:13,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:13,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:28:13,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:13,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:28:13,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:13,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-01-30 22:28:13,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-30 22:28:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:28:13,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:13,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-30 22:28:13,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-30 22:28:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:28:13,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552837801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:13,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:28:13,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 17 [2022-01-30 22:28:13,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162937302] [2022-01-30 22:28:13,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:13,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-30 22:28:13,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:13,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-30 22:28:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-30 22:28:13,473 INFO L87 Difference]: Start difference. First operand 103 states and 143 transitions. Second operand has 17 states, 16 states have (on average 3.8125) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-01-30 22:28:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:14,160 INFO L93 Difference]: Finished difference Result 336 states and 509 transitions. [2022-01-30 22:28:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-30 22:28:14,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.8125) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 61 [2022-01-30 22:28:14,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:14,164 INFO L225 Difference]: With dead ends: 336 [2022-01-30 22:28:14,164 INFO L226 Difference]: Without dead ends: 334 [2022-01-30 22:28:14,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-30 22:28:14,165 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 133 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:14,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 398 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-30 22:28:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-30 22:28:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 175. [2022-01-30 22:28:14,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 121 states have (on average 1.3553719008264462) internal successors, (164), 126 states have internal predecessors, (164), 46 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 40 states have call predecessors, (45), 45 states have call successors, (45) [2022-01-30 22:28:14,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 255 transitions. [2022-01-30 22:28:14,226 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 255 transitions. Word has length 61 [2022-01-30 22:28:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:14,229 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 255 transitions. [2022-01-30 22:28:14,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.8125) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-01-30 22:28:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 255 transitions. [2022-01-30 22:28:14,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-30 22:28:14,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:14,238 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:14,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:14,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:14,439 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:14,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:14,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1161909655, now seen corresponding path program 1 times [2022-01-30 22:28:14,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:14,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524843488] [2022-01-30 22:28:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:14,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:14,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:14,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:14,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:14,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:14,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:14,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:14,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:28:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:14,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-30 22:28:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:28:14,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:14,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524843488] [2022-01-30 22:28:14,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524843488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:14,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858909187] [2022-01-30 22:28:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:14,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:14,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:14,667 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) [2022-01-30 22:28:14,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 22:28:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:14,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-30 22:28:14,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:14,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:28:15,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:15,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:15,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:15,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:15,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:15,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:28:15,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 22:28:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-30 22:28:15,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:15,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:28:15,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:28:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:28:15,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858909187] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:15,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:28:15,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-01-30 22:28:15,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845176986] [2022-01-30 22:28:15,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:15,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-30 22:28:15,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:15,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-30 22:28:15,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-30 22:28:15,697 INFO L87 Difference]: Start difference. First operand 175 states and 255 transitions. Second operand has 25 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 22 states have internal predecessors, (85), 15 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2022-01-30 22:28:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:16,748 INFO L93 Difference]: Finished difference Result 446 states and 665 transitions. [2022-01-30 22:28:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-30 22:28:16,748 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 22 states have internal predecessors, (85), 15 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) Word has length 61 [2022-01-30 22:28:16,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:16,751 INFO L225 Difference]: With dead ends: 446 [2022-01-30 22:28:16,751 INFO L226 Difference]: Without dead ends: 444 [2022-01-30 22:28:16,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2022-01-30 22:28:16,755 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 172 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:16,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 616 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 1374 Invalid, 0 Unknown, 196 Unchecked, 0.8s Time] [2022-01-30 22:28:16,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-30 22:28:16,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 257. [2022-01-30 22:28:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 180 states have (on average 1.3777777777777778) internal successors, (248), 185 states have internal predecessors, (248), 66 states have call successors, (66), 11 states have call predecessors, (66), 10 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-01-30 22:28:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 379 transitions. [2022-01-30 22:28:16,808 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 379 transitions. Word has length 61 [2022-01-30 22:28:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:16,809 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 379 transitions. [2022-01-30 22:28:16,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 22 states have internal predecessors, (85), 15 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2022-01-30 22:28:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 379 transitions. [2022-01-30 22:28:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-30 22:28:16,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:16,811 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:16,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:17,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:17,028 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:17,029 INFO L85 PathProgramCache]: Analyzing trace with hash 361842116, now seen corresponding path program 2 times [2022-01-30 22:28:17,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:17,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135429648] [2022-01-30 22:28:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:17,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:17,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:17,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:17,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:17,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:17,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:17,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:17,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:28:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:17,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-30 22:28:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:17,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:28:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:28:17,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135429648] [2022-01-30 22:28:17,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135429648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:17,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666798714] [2022-01-30 22:28:17,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:28:17,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:17,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:17,211 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) [2022-01-30 22:28:17,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 22:28:17,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:28:17,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:28:17,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-30 22:28:17,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:17,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:28:17,365 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:28:17,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:28:17,394 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:28:17,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:17,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-01-30 22:28:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:28:17,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:17,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-30 22:28:17,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-30 22:28:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:28:17,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666798714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:17,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:28:17,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 16 [2022-01-30 22:28:17,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487241183] [2022-01-30 22:28:17,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:17,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 22:28:17,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:17,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 22:28:17,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:28:17,665 INFO L87 Difference]: Start difference. First operand 257 states and 379 transitions. Second operand has 16 states, 15 states have (on average 3.8) internal successors, (57), 13 states have internal predecessors, (57), 8 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-01-30 22:28:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:18,693 INFO L93 Difference]: Finished difference Result 1213 states and 1913 transitions. [2022-01-30 22:28:18,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-30 22:28:18,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 13 states have internal predecessors, (57), 8 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 69 [2022-01-30 22:28:18,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:18,700 INFO L225 Difference]: With dead ends: 1213 [2022-01-30 22:28:18,700 INFO L226 Difference]: Without dead ends: 1211 [2022-01-30 22:28:18,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 144 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-01-30 22:28:18,702 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 96 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:18,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 463 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-30 22:28:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-01-30 22:28:18,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 533. [2022-01-30 22:28:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 374 states have (on average 1.411764705882353) internal successors, (528), 384 states have internal predecessors, (528), 147 states have call successors, (147), 12 states have call predecessors, (147), 11 states have return successors, (146), 136 states have call predecessors, (146), 146 states have call successors, (146) [2022-01-30 22:28:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 821 transitions. [2022-01-30 22:28:18,779 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 821 transitions. Word has length 69 [2022-01-30 22:28:18,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:18,779 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 821 transitions. [2022-01-30 22:28:18,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 13 states have internal predecessors, (57), 8 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-01-30 22:28:18,780 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 821 transitions. [2022-01-30 22:28:18,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-30 22:28:18,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:18,781 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:18,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:19,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:19,002 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:19,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:19,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1021373638, now seen corresponding path program 1 times [2022-01-30 22:28:19,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:19,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206310811] [2022-01-30 22:28:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:19,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:19,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:19,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:19,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:19,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:19,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:19,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:19,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:28:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:19,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-30 22:28:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:19,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:28:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:28:19,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:19,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206310811] [2022-01-30 22:28:19,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206310811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:19,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717581904] [2022-01-30 22:28:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:19,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:19,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:19,156 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) [2022-01-30 22:28:19,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 22:28:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:19,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-30 22:28:19,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:19,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:28:19,451 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:28:19,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:19,513 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:28:19,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:28:19,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:28:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-30 22:28:19,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:20,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:28:20,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:28:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:28:20,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717581904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:20,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:28:20,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 29 [2022-01-30 22:28:20,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832882048] [2022-01-30 22:28:20,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:20,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-30 22:28:20,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-30 22:28:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-01-30 22:28:20,173 INFO L87 Difference]: Start difference. First operand 533 states and 821 transitions. Second operand has 29 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 26 states have internal predecessors, (94), 17 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2022-01-30 22:28:22,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:22,378 INFO L93 Difference]: Finished difference Result 1782 states and 2789 transitions. [2022-01-30 22:28:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-30 22:28:22,378 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 26 states have internal predecessors, (94), 17 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) Word has length 69 [2022-01-30 22:28:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:22,389 INFO L225 Difference]: With dead ends: 1782 [2022-01-30 22:28:22,389 INFO L226 Difference]: Without dead ends: 1780 [2022-01-30 22:28:22,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 133 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=419, Invalid=2443, Unknown=0, NotChecked=0, Total=2862 [2022-01-30 22:28:22,392 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 298 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 3201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:22,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 899 Invalid, 3201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 2330 Invalid, 0 Unknown, 324 Unchecked, 1.4s Time] [2022-01-30 22:28:22,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-01-30 22:28:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 806. [2022-01-30 22:28:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 570 states have (on average 1.4140350877192982) internal successors, (806), 584 states have internal predecessors, (806), 216 states have call successors, (216), 20 states have call predecessors, (216), 19 states have return successors, (215), 201 states have call predecessors, (215), 215 states have call successors, (215) [2022-01-30 22:28:22,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1237 transitions. [2022-01-30 22:28:22,530 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1237 transitions. Word has length 69 [2022-01-30 22:28:22,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:22,531 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1237 transitions. [2022-01-30 22:28:22,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 26 states have internal predecessors, (94), 17 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2022-01-30 22:28:22,531 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1237 transitions. [2022-01-30 22:28:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-30 22:28:22,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:22,534 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:22,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:22,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:22,748 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:22,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:22,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1819227041, now seen corresponding path program 3 times [2022-01-30 22:28:22,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:22,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387891651] [2022-01-30 22:28:22,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:22,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:22,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:22,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:22,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:22,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:22,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:22,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:22,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:28:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:22,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-30 22:28:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:22,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:28:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:22,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:28:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-30 22:28:22,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:22,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387891651] [2022-01-30 22:28:22,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387891651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:22,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52047177] [2022-01-30 22:28:22,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:28:22,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:22,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:22,964 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) [2022-01-30 22:28:22,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 22:28:23,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-30 22:28:23,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:28:23,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 22:28:23,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:23,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:28:23,236 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:28:23,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:23,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-01-30 22:28:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:28:23,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:32,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:28:32,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:28:32,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52047177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:32,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:28:32,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-30 22:28:32,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749198645] [2022-01-30 22:28:32,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:32,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-30 22:28:32,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-30 22:28:32,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=756, Unknown=4, NotChecked=0, Total=870 [2022-01-30 22:28:32,325 INFO L87 Difference]: Start difference. First operand 806 states and 1237 transitions. Second operand has 24 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 13 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-01-30 22:28:33,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:33,590 INFO L93 Difference]: Finished difference Result 2082 states and 3228 transitions. [2022-01-30 22:28:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-30 22:28:33,591 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 13 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 77 [2022-01-30 22:28:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:33,603 INFO L225 Difference]: With dead ends: 2082 [2022-01-30 22:28:33,604 INFO L226 Difference]: Without dead ends: 2080 [2022-01-30 22:28:33,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 117 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=225, Invalid=1493, Unknown=4, NotChecked=0, Total=1722 [2022-01-30 22:28:33,608 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 226 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:33,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 606 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1325 Invalid, 0 Unknown, 123 Unchecked, 0.8s Time] [2022-01-30 22:28:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2022-01-30 22:28:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1929. [2022-01-30 22:28:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1359 states have (on average 1.4341427520235468) internal successors, (1949), 1386 states have internal predecessors, (1949), 535 states have call successors, (535), 35 states have call predecessors, (535), 34 states have return successors, (534), 507 states have call predecessors, (534), 534 states have call successors, (534) [2022-01-30 22:28:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3018 transitions. [2022-01-30 22:28:33,817 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3018 transitions. Word has length 77 [2022-01-30 22:28:33,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:33,818 INFO L470 AbstractCegarLoop]: Abstraction has 1929 states and 3018 transitions. [2022-01-30 22:28:33,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 13 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-01-30 22:28:33,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3018 transitions. [2022-01-30 22:28:33,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-30 22:28:33,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:33,821 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:33,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:34,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:34,046 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:34,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:34,046 INFO L85 PathProgramCache]: Analyzing trace with hash -26140125, now seen corresponding path program 1 times [2022-01-30 22:28:34,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:34,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778059464] [2022-01-30 22:28:34,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:34,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:34,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:34,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:34,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:34,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:34,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:34,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:34,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:28:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:34,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-30 22:28:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:34,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:28:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:34,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:28:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-30 22:28:34,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:34,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778059464] [2022-01-30 22:28:34,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778059464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:34,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104103655] [2022-01-30 22:28:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:34,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:34,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:34,300 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) [2022-01-30 22:28:34,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 22:28:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:34,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-30 22:28:34,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:34,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:28:34,605 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:28:34,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:28:34,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:28:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:28:34,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:35,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:28:35,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:28:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-30 22:28:35,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104103655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:35,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:28:35,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 31 [2022-01-30 22:28:35,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991551308] [2022-01-30 22:28:35,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:35,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-30 22:28:35,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:35,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-30 22:28:35,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-01-30 22:28:35,357 INFO L87 Difference]: Start difference. First operand 1929 states and 3018 transitions. Second operand has 31 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 19 states have call successors, (33), 5 states have call predecessors, (33), 2 states have return successors, (28), 17 states have call predecessors, (28), 17 states have call successors, (28) [2022-01-30 22:28:44,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:44,387 INFO L93 Difference]: Finished difference Result 6533 states and 10376 transitions. [2022-01-30 22:28:44,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-30 22:28:44,388 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 19 states have call successors, (33), 5 states have call predecessors, (33), 2 states have return successors, (28), 17 states have call predecessors, (28), 17 states have call successors, (28) Word has length 77 [2022-01-30 22:28:44,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:44,416 INFO L225 Difference]: With dead ends: 6533 [2022-01-30 22:28:44,416 INFO L226 Difference]: Without dead ends: 6531 [2022-01-30 22:28:44,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 157 SyntacticMatches, 11 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=895, Invalid=6075, Unknown=2, NotChecked=0, Total=6972 [2022-01-30 22:28:44,421 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 635 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 4329 mSolverCounterSat, 1553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 6365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1553 IncrementalHoareTripleChecker+Valid, 4329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:44,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 1272 Invalid, 6365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1553 Valid, 4329 Invalid, 0 Unknown, 483 Unchecked, 2.7s Time] [2022-01-30 22:28:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6531 states. [2022-01-30 22:28:44,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6531 to 3411. [2022-01-30 22:28:44,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 2410 states have (on average 1.4556016597510373) internal successors, (3508), 2439 states have internal predecessors, (3508), 960 states have call successors, (960), 41 states have call predecessors, (960), 40 states have return successors, (959), 930 states have call predecessors, (959), 959 states have call successors, (959) [2022-01-30 22:28:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 5427 transitions. [2022-01-30 22:28:44,948 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 5427 transitions. Word has length 77 [2022-01-30 22:28:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:44,948 INFO L470 AbstractCegarLoop]: Abstraction has 3411 states and 5427 transitions. [2022-01-30 22:28:44,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 19 states have call successors, (33), 5 states have call predecessors, (33), 2 states have return successors, (28), 17 states have call predecessors, (28), 17 states have call successors, (28) [2022-01-30 22:28:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 5427 transitions. [2022-01-30 22:28:44,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-30 22:28:44,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:44,953 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-30 22:28:44,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:45,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-30 22:28:45,178 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:45,179 INFO L85 PathProgramCache]: Analyzing trace with hash 192510324, now seen corresponding path program 2 times [2022-01-30 22:28:45,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:45,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351401840] [2022-01-30 22:28:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:45,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:45,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:45,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:45,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:45,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:45,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:45,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:45,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:28:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:45,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:28:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:45,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:28:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:45,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:28:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:45,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:28:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:45,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-30 22:28:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-01-30 22:28:45,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:45,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351401840] [2022-01-30 22:28:45,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351401840] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:45,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210106269] [2022-01-30 22:28:45,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:28:45,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:45,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:45,516 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) [2022-01-30 22:28:45,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 22:28:45,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:28:45,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:28:45,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-30 22:28:45,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:45,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:28:45,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:45,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:45,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:45,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:45,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:45,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:45,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:46,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:46,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:46,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:46,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:46,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:46,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:46,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:46,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:46,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:46,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:46,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 22:28:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-30 22:28:46,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:46,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210106269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:46,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:28:46,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-01-30 22:28:46,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666230052] [2022-01-30 22:28:46,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:46,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-30 22:28:46,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-30 22:28:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-01-30 22:28:46,686 INFO L87 Difference]: Start difference. First operand 3411 states and 5427 transitions. Second operand has 22 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 12 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2022-01-30 22:28:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:47,959 INFO L93 Difference]: Finished difference Result 3594 states and 5653 transitions. [2022-01-30 22:28:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 22:28:47,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 12 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 85 [2022-01-30 22:28:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:47,972 INFO L225 Difference]: With dead ends: 3594 [2022-01-30 22:28:47,972 INFO L226 Difference]: Without dead ends: 3592 [2022-01-30 22:28:47,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 121 SyntacticMatches, 22 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2022-01-30 22:28:47,974 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 177 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:47,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 572 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1100 Invalid, 0 Unknown, 119 Unchecked, 0.6s Time] [2022-01-30 22:28:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2022-01-30 22:28:48,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 2399. [2022-01-30 22:28:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 1697 states have (on average 1.4443134944018856) internal successors, (2451), 1713 states have internal predecessors, (2451), 660 states have call successors, (660), 42 states have call predecessors, (660), 41 states have return successors, (659), 643 states have call predecessors, (659), 659 states have call successors, (659) [2022-01-30 22:28:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3770 transitions. [2022-01-30 22:28:48,329 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3770 transitions. Word has length 85 [2022-01-30 22:28:48,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:48,330 INFO L470 AbstractCegarLoop]: Abstraction has 2399 states and 3770 transitions. [2022-01-30 22:28:48,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 12 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2022-01-30 22:28:48,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3770 transitions. [2022-01-30 22:28:48,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-30 22:28:48,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:48,333 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:48,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-30 22:28:48,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:48,546 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash -266079106, now seen corresponding path program 4 times [2022-01-30 22:28:48,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:48,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647935932] [2022-01-30 22:28:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:48,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:48,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:48,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:48,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:48,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:48,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:48,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:48,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:28:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:48,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-30 22:28:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:48,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:28:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:48,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:28:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:48,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-30 22:28:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-30 22:28:48,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:48,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647935932] [2022-01-30 22:28:48,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647935932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:48,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638757085] [2022-01-30 22:28:48,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:28:48,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:48,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:48,707 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) [2022-01-30 22:28:48,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 22:28:48,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:28:48,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:28:48,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-30 22:28:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:48,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-30 22:28:49,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-01-30 22:28:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-30 22:28:49,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:49,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-30 22:28:49,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-30 22:28:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-30 22:28:49,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638757085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:49,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:28:49,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 20 [2022-01-30 22:28:49,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198472993] [2022-01-30 22:28:49,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:49,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-30 22:28:49,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:49,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-30 22:28:49,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-30 22:28:49,204 INFO L87 Difference]: Start difference. First operand 2399 states and 3770 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 11 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2022-01-30 22:28:53,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:53,990 INFO L93 Difference]: Finished difference Result 14159 states and 22761 transitions. [2022-01-30 22:28:53,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-30 22:28:53,990 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 11 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 85 [2022-01-30 22:28:53,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:54,043 INFO L225 Difference]: With dead ends: 14159 [2022-01-30 22:28:54,044 INFO L226 Difference]: Without dead ends: 14157 [2022-01-30 22:28:54,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=588, Invalid=4668, Unknown=0, NotChecked=0, Total=5256 [2022-01-30 22:28:54,050 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 314 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 5056 mSolverCounterSat, 1063 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 6119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1063 IncrementalHoareTripleChecker+Valid, 5056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:54,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1566 Invalid, 6119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1063 Valid, 5056 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-30 22:28:54,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14157 states. [2022-01-30 22:28:54,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14157 to 5383. [2022-01-30 22:28:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5383 states, 3797 states have (on average 1.4545693968922835) internal successors, (5523), 3837 states have internal predecessors, (5523), 1541 states have call successors, (1541), 45 states have call predecessors, (1541), 44 states have return successors, (1540), 1500 states have call predecessors, (1540), 1540 states have call successors, (1540) [2022-01-30 22:28:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5383 states to 5383 states and 8604 transitions. [2022-01-30 22:28:54,983 INFO L78 Accepts]: Start accepts. Automaton has 5383 states and 8604 transitions. Word has length 85 [2022-01-30 22:28:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:54,983 INFO L470 AbstractCegarLoop]: Abstraction has 5383 states and 8604 transitions. [2022-01-30 22:28:54,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 11 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2022-01-30 22:28:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5383 states and 8604 transitions. [2022-01-30 22:28:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-30 22:28:54,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:54,988 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:55,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-30 22:28:55,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-30 22:28:55,204 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:55,204 INFO L85 PathProgramCache]: Analyzing trace with hash 157567616, now seen corresponding path program 1 times [2022-01-30 22:28:55,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:55,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166617422] [2022-01-30 22:28:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:55,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:55,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:55,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:55,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:55,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:55,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:55,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:55,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:28:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:55,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-30 22:28:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:55,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:28:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:55,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:28:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:55,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-30 22:28:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-30 22:28:55,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:55,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166617422] [2022-01-30 22:28:55,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166617422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:55,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904168140] [2022-01-30 22:28:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:55,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:55,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:55,395 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) [2022-01-30 22:28:55,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-30 22:28:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:55,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-30 22:28:55,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:55,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-30 22:28:56,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:28:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-30 22:28:56,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:58,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:28:58,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:28:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-30 22:28:58,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904168140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:58,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:28:58,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 35 [2022-01-30 22:28:58,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596545198] [2022-01-30 22:28:58,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:58,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-30 22:28:58,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:58,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-30 22:28:58,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1071, Unknown=1, NotChecked=0, Total=1190 [2022-01-30 22:28:58,492 INFO L87 Difference]: Start difference. First operand 5383 states and 8604 transitions. Second operand has 35 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 21 states have call successors, (36), 5 states have call predecessors, (36), 2 states have return successors, (31), 19 states have call predecessors, (31), 19 states have call successors, (31) [2022-01-30 22:29:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:21,951 INFO L93 Difference]: Finished difference Result 9891 states and 15731 transitions. [2022-01-30 22:29:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-30 22:29:21,952 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 21 states have call successors, (36), 5 states have call predecessors, (36), 2 states have return successors, (31), 19 states have call predecessors, (31), 19 states have call successors, (31) Word has length 85 [2022-01-30 22:29:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:21,977 INFO L225 Difference]: With dead ends: 9891 [2022-01-30 22:29:21,977 INFO L226 Difference]: Without dead ends: 9889 [2022-01-30 22:29:21,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 173 SyntacticMatches, 8 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=1460, Invalid=7459, Unknown=11, NotChecked=0, Total=8930 [2022-01-30 22:29:21,983 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 494 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 4201 mSolverCounterSat, 1326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 5870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1326 IncrementalHoareTripleChecker+Valid, 4201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:21,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 1325 Invalid, 5870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1326 Valid, 4201 Invalid, 0 Unknown, 343 Unchecked, 2.3s Time] [2022-01-30 22:29:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9889 states. [2022-01-30 22:29:22,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9889 to 4541. [2022-01-30 22:29:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4541 states, 3219 states have (on average 1.4582168375271825) internal successors, (4694), 3243 states have internal predecessors, (4694), 1275 states have call successors, (1275), 47 states have call predecessors, (1275), 46 states have return successors, (1274), 1250 states have call predecessors, (1274), 1274 states have call successors, (1274) [2022-01-30 22:29:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4541 states to 4541 states and 7243 transitions. [2022-01-30 22:29:22,814 INFO L78 Accepts]: Start accepts. Automaton has 4541 states and 7243 transitions. Word has length 85 [2022-01-30 22:29:22,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:22,814 INFO L470 AbstractCegarLoop]: Abstraction has 4541 states and 7243 transitions. [2022-01-30 22:29:22,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 21 states have call successors, (36), 5 states have call predecessors, (36), 2 states have return successors, (31), 19 states have call predecessors, (31), 19 states have call successors, (31) [2022-01-30 22:29:22,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4541 states and 7243 transitions. [2022-01-30 22:29:22,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-30 22:29:22,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:22,819 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-30 22:29:22,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:23,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-30 22:29:23,036 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:23,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1767705169, now seen corresponding path program 2 times [2022-01-30 22:29:23,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:23,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995675164] [2022-01-30 22:29:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:23,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:29:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:29:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:29:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:29:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:29:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:29:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:29:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:29:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:29:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:29:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:29:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-30 22:29:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:29:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-01-30 22:29:23,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:23,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995675164] [2022-01-30 22:29:23,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995675164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:23,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120165394] [2022-01-30 22:29:23,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:29:23,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:23,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:23,282 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) [2022-01-30 22:29:23,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-30 22:29:23,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:29:23,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:29:23,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-30 22:29:23,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:23,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:29:23,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:23,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:23,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:23,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:23,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:23,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:23,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:23,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:23,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:23,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:23,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:23,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:23,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:23,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:24,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:24,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:24,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 22:29:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 48 proven. 23 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-01-30 22:29:24,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:24,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120165394] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:24,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:29:24,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-01-30 22:29:24,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011966971] [2022-01-30 22:29:24,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:24,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-30 22:29:24,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:24,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-30 22:29:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-30 22:29:24,404 INFO L87 Difference]: Start difference. First operand 4541 states and 7243 transitions. Second operand has 22 states, 20 states have (on average 4.4) internal successors, (88), 19 states have internal predecessors, (88), 14 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-01-30 22:29:25,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:25,709 INFO L93 Difference]: Finished difference Result 4993 states and 7874 transitions. [2022-01-30 22:29:25,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 22:29:25,710 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 4.4) internal successors, (88), 19 states have internal predecessors, (88), 14 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 93 [2022-01-30 22:29:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:25,723 INFO L225 Difference]: With dead ends: 4993 [2022-01-30 22:29:25,723 INFO L226 Difference]: Without dead ends: 4991 [2022-01-30 22:29:25,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 127 SyntacticMatches, 24 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=1366, Unknown=0, NotChecked=0, Total=1560 [2022-01-30 22:29:25,725 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 112 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:25,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 689 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1184 Invalid, 0 Unknown, 186 Unchecked, 0.6s Time] [2022-01-30 22:29:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2022-01-30 22:29:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 4642. [2022-01-30 22:29:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 3291 states have (on average 1.455788514129444) internal successors, (4791), 3319 states have internal predecessors, (4791), 1300 states have call successors, (1300), 51 states have call predecessors, (1300), 50 states have return successors, (1299), 1271 states have call predecessors, (1299), 1299 states have call successors, (1299) [2022-01-30 22:29:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 7390 transitions. [2022-01-30 22:29:26,477 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 7390 transitions. Word has length 93 [2022-01-30 22:29:26,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:26,478 INFO L470 AbstractCegarLoop]: Abstraction has 4642 states and 7390 transitions. [2022-01-30 22:29:26,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 4.4) internal successors, (88), 19 states have internal predecessors, (88), 14 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-01-30 22:29:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 7390 transitions. [2022-01-30 22:29:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-30 22:29:26,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:26,482 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-30 22:29:26,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:26,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-30 22:29:26,684 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1752186451, now seen corresponding path program 1 times [2022-01-30 22:29:26,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:26,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228371047] [2022-01-30 22:29:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:26,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:29:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:29:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:29:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:29:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:29:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:29:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:29:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:29:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:29:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:29:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:29:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-30 22:29:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:29:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-01-30 22:29:26,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:26,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228371047] [2022-01-30 22:29:26,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228371047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:26,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450394304] [2022-01-30 22:29:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:26,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:26,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:26,952 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) [2022-01-30 22:29:26,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-30 22:29:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:27,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-30 22:29:27,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:27,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:29:27,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:27,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:27,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:27,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:27,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:27,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:27,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:27,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:27,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:27,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:27,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:27,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:27,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:27,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:27,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:27,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 22:29:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 48 proven. 23 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-01-30 22:29:27,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:28,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450394304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:28,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:29:28,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2022-01-30 22:29:28,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744928421] [2022-01-30 22:29:28,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:28,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-30 22:29:28,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:28,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-30 22:29:28,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-01-30 22:29:28,123 INFO L87 Difference]: Start difference. First operand 4642 states and 7390 transitions. Second operand has 23 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 14 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-01-30 22:29:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:29,809 INFO L93 Difference]: Finished difference Result 7551 states and 12007 transitions. [2022-01-30 22:29:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-30 22:29:29,811 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 14 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 93 [2022-01-30 22:29:29,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:29,826 INFO L225 Difference]: With dead ends: 7551 [2022-01-30 22:29:29,826 INFO L226 Difference]: Without dead ends: 7549 [2022-01-30 22:29:29,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 130 SyntacticMatches, 22 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2022-01-30 22:29:29,831 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 98 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:29,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 740 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1479 Invalid, 0 Unknown, 196 Unchecked, 0.6s Time] [2022-01-30 22:29:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7549 states. [2022-01-30 22:29:30,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7549 to 4712. [2022-01-30 22:29:30,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4712 states, 3339 states have (on average 1.4558250973345312) internal successors, (4861), 3367 states have internal predecessors, (4861), 1320 states have call successors, (1320), 53 states have call predecessors, (1320), 52 states have return successors, (1319), 1291 states have call predecessors, (1319), 1319 states have call successors, (1319) [2022-01-30 22:29:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4712 states to 4712 states and 7500 transitions. [2022-01-30 22:29:30,631 INFO L78 Accepts]: Start accepts. Automaton has 4712 states and 7500 transitions. Word has length 93 [2022-01-30 22:29:30,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:30,631 INFO L470 AbstractCegarLoop]: Abstraction has 4712 states and 7500 transitions. [2022-01-30 22:29:30,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 14 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-01-30 22:29:30,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4712 states and 7500 transitions. [2022-01-30 22:29:30,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-30 22:29:30,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:30,637 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-30 22:29:30,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:30,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-30 22:29:30,851 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:30,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:30,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2119134123, now seen corresponding path program 1 times [2022-01-30 22:29:30,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:30,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244600584] [2022-01-30 22:29:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:30,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:29:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:29:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:29:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:29:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:29:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:29:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:29:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:29:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:29:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:29:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:29:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-30 22:29:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:29:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-01-30 22:29:31,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:31,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244600584] [2022-01-30 22:29:31,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244600584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:31,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322833666] [2022-01-30 22:29:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:31,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:31,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:31,136 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) [2022-01-30 22:29:31,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-30 22:29:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:31,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-30 22:29:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:31,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:29:31,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:31,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:31,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:31,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:31,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:31,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:31,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:31,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:31,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:31,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:31,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:31,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:31,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:31,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:31,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:31,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:32,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 22:29:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 48 proven. 23 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-01-30 22:29:32,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:32,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322833666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:32,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:29:32,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2022-01-30 22:29:32,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340228533] [2022-01-30 22:29:32,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:32,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-30 22:29:32,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:32,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-30 22:29:32,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-30 22:29:32,294 INFO L87 Difference]: Start difference. First operand 4712 states and 7500 transitions. Second operand has 23 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 14 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-01-30 22:29:33,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:33,690 INFO L93 Difference]: Finished difference Result 4927 states and 7764 transitions. [2022-01-30 22:29:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-30 22:29:33,691 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 14 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 93 [2022-01-30 22:29:33,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:33,698 INFO L225 Difference]: With dead ends: 4927 [2022-01-30 22:29:33,699 INFO L226 Difference]: Without dead ends: 4925 [2022-01-30 22:29:33,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 132 SyntacticMatches, 22 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2022-01-30 22:29:33,701 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 157 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:33,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 842 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1199 Invalid, 0 Unknown, 185 Unchecked, 0.5s Time] [2022-01-30 22:29:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4925 states. [2022-01-30 22:29:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4925 to 4736. [2022-01-30 22:29:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4736 states, 3356 states have (on average 1.4553039332538737) internal successors, (4884), 3384 states have internal predecessors, (4884), 1324 states have call successors, (1324), 56 states have call predecessors, (1324), 55 states have return successors, (1323), 1295 states have call predecessors, (1323), 1323 states have call successors, (1323) [2022-01-30 22:29:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4736 states to 4736 states and 7531 transitions. [2022-01-30 22:29:34,408 INFO L78 Accepts]: Start accepts. Automaton has 4736 states and 7531 transitions. Word has length 93 [2022-01-30 22:29:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:34,409 INFO L470 AbstractCegarLoop]: Abstraction has 4736 states and 7531 transitions. [2022-01-30 22:29:34,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 14 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-01-30 22:29:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4736 states and 7531 transitions. [2022-01-30 22:29:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-30 22:29:34,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:34,415 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-30 22:29:34,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:34,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:34,635 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:34,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:34,636 INFO L85 PathProgramCache]: Analyzing trace with hash -716829995, now seen corresponding path program 1 times [2022-01-30 22:29:34,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:34,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197668824] [2022-01-30 22:29:34,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:34,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:29:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:29:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:29:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:29:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:29:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:29:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:29:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:29:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:29:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:29:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:29:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-30 22:29:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:29:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-01-30 22:29:34,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:34,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197668824] [2022-01-30 22:29:34,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197668824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:34,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361299724] [2022-01-30 22:29:34,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:34,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:34,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:34,887 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) [2022-01-30 22:29:34,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-30 22:29:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:34,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-30 22:29:34,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:35,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:29:35,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:35,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:35,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:35,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:35,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:35,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:35,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:35,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:35,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:35,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:35,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:35,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:35,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:35,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:35,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:29:35,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 22:29:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 48 proven. 23 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-01-30 22:29:35,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:36,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361299724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:36,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:29:36,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-01-30 22:29:36,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048330950] [2022-01-30 22:29:36,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:36,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-30 22:29:36,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-30 22:29:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-30 22:29:36,103 INFO L87 Difference]: Start difference. First operand 4736 states and 7531 transitions. Second operand has 22 states, 20 states have (on average 4.4) internal successors, (88), 19 states have internal predecessors, (88), 14 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-01-30 22:29:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:37,411 INFO L93 Difference]: Finished difference Result 4911 states and 7736 transitions. [2022-01-30 22:29:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-30 22:29:37,411 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 4.4) internal successors, (88), 19 states have internal predecessors, (88), 14 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 93 [2022-01-30 22:29:37,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:37,418 INFO L225 Difference]: With dead ends: 4911 [2022-01-30 22:29:37,418 INFO L226 Difference]: Without dead ends: 4909 [2022-01-30 22:29:37,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 128 SyntacticMatches, 23 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2022-01-30 22:29:37,420 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 147 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:37,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 520 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 978 Invalid, 0 Unknown, 148 Unchecked, 0.5s Time] [2022-01-30 22:29:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4909 states. [2022-01-30 22:29:37,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4909 to 2610. [2022-01-30 22:29:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 1852 states have (on average 1.4384449244060475) internal successors, (2664), 1870 states have internal predecessors, (2664), 712 states have call successors, (712), 46 states have call predecessors, (712), 45 states have return successors, (711), 693 states have call predecessors, (711), 711 states have call successors, (711) [2022-01-30 22:29:37,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 4087 transitions. [2022-01-30 22:29:37,930 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 4087 transitions. Word has length 93 [2022-01-30 22:29:37,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:37,931 INFO L470 AbstractCegarLoop]: Abstraction has 2610 states and 4087 transitions. [2022-01-30 22:29:37,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 4.4) internal successors, (88), 19 states have internal predecessors, (88), 14 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-01-30 22:29:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 4087 transitions. [2022-01-30 22:29:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-30 22:29:37,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:37,935 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:29:37,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:38,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-30 22:29:38,147 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:38,148 INFO L85 PathProgramCache]: Analyzing trace with hash -768833445, now seen corresponding path program 5 times [2022-01-30 22:29:38,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:38,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989332808] [2022-01-30 22:29:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:38,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:38,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:29:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:38,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:29:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:38,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:29:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:38,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:29:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:38,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:29:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:38,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:29:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:38,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:29:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:38,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-30 22:29:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:38,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:29:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:38,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:29:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:38,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-30 22:29:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:38,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:29:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 43 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-30 22:29:38,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:38,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989332808] [2022-01-30 22:29:38,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989332808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:38,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182790048] [2022-01-30 22:29:38,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:29:38,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:38,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:38,476 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) [2022-01-30 22:29:38,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-30 22:29:38,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-30 22:29:38,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:29:38,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 22:29:38,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-30 22:29:39,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-30 22:29:39,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182790048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:29:39,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:29:39,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 34 [2022-01-30 22:29:39,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411399797] [2022-01-30 22:29:39,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:39,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-30 22:29:39,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:39,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-30 22:29:39,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-01-30 22:29:39,648 INFO L87 Difference]: Start difference. First operand 2610 states and 4087 transitions. Second operand has 34 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 33 states have internal predecessors, (121), 23 states have call successors, (37), 5 states have call predecessors, (37), 3 states have return successors, (34), 22 states have call predecessors, (34), 22 states have call successors, (34) [2022-01-30 22:29:40,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:40,711 INFO L93 Difference]: Finished difference Result 2677 states and 4154 transitions. [2022-01-30 22:29:40,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-30 22:29:40,711 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 33 states have internal predecessors, (121), 23 states have call successors, (37), 5 states have call predecessors, (37), 3 states have return successors, (34), 22 states have call predecessors, (34), 22 states have call successors, (34) Word has length 93 [2022-01-30 22:29:40,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:40,716 INFO L225 Difference]: With dead ends: 2677 [2022-01-30 22:29:40,716 INFO L226 Difference]: Without dead ends: 2610 [2022-01-30 22:29:40,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1324, Unknown=0, NotChecked=0, Total=1722 [2022-01-30 22:29:40,718 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 174 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:40,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 160 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 22:29:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2022-01-30 22:29:41,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 2610. [2022-01-30 22:29:41,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 1852 states have (on average 1.42548596112311) internal successors, (2640), 1870 states have internal predecessors, (2640), 712 states have call successors, (712), 46 states have call predecessors, (712), 45 states have return successors, (711), 693 states have call predecessors, (711), 711 states have call successors, (711) [2022-01-30 22:29:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 4063 transitions. [2022-01-30 22:29:41,390 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 4063 transitions. Word has length 93 [2022-01-30 22:29:41,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:41,390 INFO L470 AbstractCegarLoop]: Abstraction has 2610 states and 4063 transitions. [2022-01-30 22:29:41,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 33 states have internal predecessors, (121), 23 states have call successors, (37), 5 states have call predecessors, (37), 3 states have return successors, (34), 22 states have call predecessors, (34), 22 states have call successors, (34) [2022-01-30 22:29:41,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 4063 transitions. [2022-01-30 22:29:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-30 22:29:41,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:41,397 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:29:41,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:41,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-30 22:29:41,621 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:41,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1704777921, now seen corresponding path program 6 times [2022-01-30 22:29:41,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:41,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992537724] [2022-01-30 22:29:41,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:41,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:29:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:29:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:29:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:29:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:29:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:29:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:29:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:29:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:29:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:29:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:29:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-30 22:29:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:29:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-30 22:29:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-30 22:29:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-30 22:29:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-30 22:29:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 10 proven. 69 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-01-30 22:29:41,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:41,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992537724] [2022-01-30 22:29:41,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992537724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:41,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565025478] [2022-01-30 22:29:41,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 22:29:41,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:41,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:41,858 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) [2022-01-30 22:29:41,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-30 22:29:41,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-30 22:29:41,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:29:41,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-30 22:29:42,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:42,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:29:50,238 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:29:50,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:29:58,323 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:29:58,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:30:06,425 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:30:06,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:30:14,507 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:30:14,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:30:55,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-01-30 22:30:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 72 proven. 79 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-01-30 22:30:55,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:30:55,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:30:55,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:30:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 10 proven. 69 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-01-30 22:30:55,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565025478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:30:55,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:30:55,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 31 [2022-01-30 22:30:55,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460501058] [2022-01-30 22:30:55,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:30:55,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-30 22:30:55,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:30:55,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-30 22:30:55,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=815, Unknown=4, NotChecked=0, Total=930 [2022-01-30 22:30:55,439 INFO L87 Difference]: Start difference. First operand 2610 states and 4063 transitions. Second operand has 31 states, 29 states have (on average 4.344827586206897) internal successors, (126), 28 states have internal predecessors, (126), 21 states have call successors, (43), 5 states have call predecessors, (43), 2 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2022-01-30 22:33:00,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:33:00,324 INFO L93 Difference]: Finished difference Result 15213 states and 24471 transitions. [2022-01-30 22:33:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-30 22:33:00,325 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.344827586206897) internal successors, (126), 28 states have internal predecessors, (126), 21 states have call successors, (43), 5 states have call predecessors, (43), 2 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) Word has length 125 [2022-01-30 22:33:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:33:00,350 INFO L225 Difference]: With dead ends: 15213 [2022-01-30 22:33:00,350 INFO L226 Difference]: Without dead ends: 15211 [2022-01-30 22:33:00,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 249 SyntacticMatches, 33 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5073 ImplicationChecksByTransitivity, 190.6s TimeCoverageRelationStatistics Valid=1247, Invalid=10681, Unknown=62, NotChecked=0, Total=11990 [2022-01-30 22:33:00,355 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 456 mSDsluCounter, 2202 mSDsCounter, 0 mSdLazyCounter, 8165 mSolverCounterSat, 1358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 10486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1358 IncrementalHoareTripleChecker+Valid, 8165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 963 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:33:00,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 2660 Invalid, 10486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1358 Valid, 8165 Invalid, 0 Unknown, 963 Unchecked, 4.0s Time] [2022-01-30 22:33:00,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15211 states. [2022-01-30 22:33:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15211 to 6023. [2022-01-30 22:33:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6023 states, 4281 states have (on average 1.454800280308339) internal successors, (6228), 4312 states have internal predecessors, (6228), 1679 states have call successors, (1679), 63 states have call predecessors, (1679), 62 states have return successors, (1678), 1647 states have call predecessors, (1678), 1678 states have call successors, (1678) [2022-01-30 22:33:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 9585 transitions. [2022-01-30 22:33:01,743 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 9585 transitions. Word has length 125 [2022-01-30 22:33:01,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:33:01,743 INFO L470 AbstractCegarLoop]: Abstraction has 6023 states and 9585 transitions. [2022-01-30 22:33:01,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.344827586206897) internal successors, (126), 28 states have internal predecessors, (126), 21 states have call successors, (43), 5 states have call predecessors, (43), 2 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2022-01-30 22:33:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 9585 transitions. [2022-01-30 22:33:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-30 22:33:01,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:33:01,754 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:33:01,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-30 22:33:01,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:33:01,979 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:33:01,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:33:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash -206264637, now seen corresponding path program 1 times [2022-01-30 22:33:01,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:33:01,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141927566] [2022-01-30 22:33:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:33:01,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:33:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:33:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:33:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:33:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:33:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:33:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:33:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:33:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:33:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:33:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:33:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:33:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-30 22:33:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:33:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-30 22:33:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-30 22:33:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-30 22:33:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-30 22:33:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 10 proven. 69 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-01-30 22:33:02,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:33:02,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141927566] [2022-01-30 22:33:02,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141927566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:33:02,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075827976] [2022-01-30 22:33:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:33:02,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:33:02,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:33:02,252 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) [2022-01-30 22:33:02,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-30 22:33:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:02,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-30 22:33:02,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:33:02,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:33:02,659 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:33:02,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:33:02,724 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:33:02,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:33:02,788 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:33:02,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:33:02,850 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:33:02,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:33:03,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:33:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 72 proven. 79 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-01-30 22:33:03,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:33:03,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:33:03,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:33:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 10 proven. 69 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-01-30 22:33:03,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075827976] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:33:03,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:33:03,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 41 [2022-01-30 22:33:03,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498646516] [2022-01-30 22:33:03,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:33:03,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-30 22:33:03,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:33:03,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-30 22:33:03,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1488, Unknown=0, NotChecked=0, Total=1640 [2022-01-30 22:33:03,941 INFO L87 Difference]: Start difference. First operand 6023 states and 9585 transitions. Second operand has 41 states, 39 states have (on average 4.0256410256410255) internal successors, (157), 38 states have internal predecessors, (157), 29 states have call successors, (54), 5 states have call predecessors, (54), 2 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2022-01-30 22:35:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:35:22,531 INFO L93 Difference]: Finished difference Result 36444 states and 58975 transitions. [2022-01-30 22:35:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-01-30 22:35:22,532 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 4.0256410256410255) internal successors, (157), 38 states have internal predecessors, (157), 29 states have call successors, (54), 5 states have call predecessors, (54), 2 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) Word has length 125 [2022-01-30 22:35:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:35:22,628 INFO L225 Difference]: With dead ends: 36444 [2022-01-30 22:35:22,628 INFO L226 Difference]: Without dead ends: 36442 [2022-01-30 22:35:22,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 242 SyntacticMatches, 24 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13609 ImplicationChecksByTransitivity, 125.1s TimeCoverageRelationStatistics Valid=4383, Invalid=29219, Unknown=70, NotChecked=0, Total=33672 [2022-01-30 22:35:22,645 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 1274 mSDsluCounter, 2249 mSDsCounter, 0 mSdLazyCounter, 11647 mSolverCounterSat, 5121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 2788 SdHoareTripleChecker+Invalid, 17855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5121 IncrementalHoareTripleChecker+Valid, 11647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1087 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-01-30 22:35:22,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1295 Valid, 2788 Invalid, 17855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5121 Valid, 11647 Invalid, 0 Unknown, 1087 Unchecked, 6.9s Time] [2022-01-30 22:35:22,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36442 states. [2022-01-30 22:35:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36442 to 9166. [2022-01-30 22:35:25,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9166 states, 6501 states have (on average 1.458852484233195) internal successors, (9484), 6545 states have internal predecessors, (9484), 2593 states have call successors, (2593), 72 states have call predecessors, (2593), 71 states have return successors, (2592), 2548 states have call predecessors, (2592), 2592 states have call successors, (2592) [2022-01-30 22:35:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9166 states to 9166 states and 14669 transitions. [2022-01-30 22:35:25,381 INFO L78 Accepts]: Start accepts. Automaton has 9166 states and 14669 transitions. Word has length 125 [2022-01-30 22:35:25,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:35:25,381 INFO L470 AbstractCegarLoop]: Abstraction has 9166 states and 14669 transitions. [2022-01-30 22:35:25,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 4.0256410256410255) internal successors, (157), 38 states have internal predecessors, (157), 29 states have call successors, (54), 5 states have call predecessors, (54), 2 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2022-01-30 22:35:25,381 INFO L276 IsEmpty]: Start isEmpty. Operand 9166 states and 14669 transitions. [2022-01-30 22:35:25,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-30 22:35:25,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:35:25,395 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:35:25,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-30 22:35:25,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:35:25,619 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:35:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:35:25,619 INFO L85 PathProgramCache]: Analyzing trace with hash 349417620, now seen corresponding path program 1 times [2022-01-30 22:35:25,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:35:25,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917444321] [2022-01-30 22:35:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:35:25,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:35:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:35:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:35:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:35:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:35:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:35:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:35:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:35:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:35:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:35:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:35:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:35:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-30 22:35:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-30 22:35:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:35:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-01-30 22:35:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-30 22:35:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-30 22:35:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-30 22:35:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-30 22:35:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 4 proven. 62 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-01-30 22:35:25,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:35:25,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917444321] [2022-01-30 22:35:25,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917444321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:35:25,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327003594] [2022-01-30 22:35:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:35:25,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:35:25,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:35:25,926 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) [2022-01-30 22:35:25,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-30 22:35:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:26,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-30 22:35:26,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:35:26,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:35:26,262 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:35:26,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:35:26,324 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:35:26,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:35:26,412 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:35:26,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:35:26,476 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:35:26,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:35:26,537 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:35:26,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:35:26,599 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:35:26,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:35:26,662 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:35:26,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:35:26,763 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:35:26,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:35:26,840 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:35:26,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:35:26,919 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:35:26,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:35:26,997 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:35:26,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:35:27,071 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:35:27,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:35:27,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:35:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 124 proven. 50 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-01-30 22:35:27,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:35:29,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327003594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:35:29,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:35:29,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2022-01-30 22:35:29,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115394695] [2022-01-30 22:35:29,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:35:29,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-30 22:35:29,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:35:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-30 22:35:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=879, Unknown=1, NotChecked=0, Total=992 [2022-01-30 22:35:29,613 INFO L87 Difference]: Start difference. First operand 9166 states and 14669 transitions. Second operand has 27 states, 25 states have (on average 4.72) internal successors, (118), 24 states have internal predecessors, (118), 17 states have call successors, (41), 5 states have call predecessors, (41), 2 states have return successors, (37), 15 states have call predecessors, (37), 15 states have call successors, (37) [2022-01-30 22:35:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:35:32,876 INFO L93 Difference]: Finished difference Result 9852 states and 15648 transitions. [2022-01-30 22:35:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-30 22:35:32,877 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.72) internal successors, (118), 24 states have internal predecessors, (118), 17 states have call successors, (41), 5 states have call predecessors, (41), 2 states have return successors, (37), 15 states have call predecessors, (37), 15 states have call successors, (37) Word has length 133 [2022-01-30 22:35:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:35:32,892 INFO L225 Difference]: With dead ends: 9852 [2022-01-30 22:35:32,892 INFO L226 Difference]: Without dead ends: 9850 [2022-01-30 22:35:32,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 187 SyntacticMatches, 32 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=267, Invalid=2182, Unknown=1, NotChecked=0, Total=2450 [2022-01-30 22:35:32,895 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 134 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:35:32,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 863 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1339 Invalid, 0 Unknown, 190 Unchecked, 0.6s Time] [2022-01-30 22:35:32,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9850 states. [2022-01-30 22:35:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9850 to 4128. [2022-01-30 22:35:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 2924 states have (on average 1.4353625170998632) internal successors, (4197), 2946 states have internal predecessors, (4197), 1135 states have call successors, (1135), 69 states have call predecessors, (1135), 68 states have return successors, (1134), 1112 states have call predecessors, (1134), 1134 states have call successors, (1134) [2022-01-30 22:35:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 6466 transitions. [2022-01-30 22:35:34,543 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 6466 transitions. Word has length 133 [2022-01-30 22:35:34,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:35:34,543 INFO L470 AbstractCegarLoop]: Abstraction has 4128 states and 6466 transitions. [2022-01-30 22:35:34,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.72) internal successors, (118), 24 states have internal predecessors, (118), 17 states have call successors, (41), 5 states have call predecessors, (41), 2 states have return successors, (37), 15 states have call predecessors, (37), 15 states have call successors, (37) [2022-01-30 22:35:34,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 6466 transitions. [2022-01-30 22:35:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-30 22:35:34,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:35:34,551 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:35:34,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-30 22:35:34,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:35:34,771 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:35:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:35:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash 275413406, now seen corresponding path program 7 times [2022-01-30 22:35:34,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:35:34,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348856950] [2022-01-30 22:35:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:35:34,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:35:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:34,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:35:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:34,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:35:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:34,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:35:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:34,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:35:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:34,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:35:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:34,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:35:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:34,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:35:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:34,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:35:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:35,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:35:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:35,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:35:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:35,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:35:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:35,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-30 22:35:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:35,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:35:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:35,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-30 22:35:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:35,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-30 22:35:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:35,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-30 22:35:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:35,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-30 22:35:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:35,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-30 22:35:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 12 proven. 91 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-01-30 22:35:35,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:35:35,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348856950] [2022-01-30 22:35:35,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348856950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:35:35,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689274190] [2022-01-30 22:35:35,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 22:35:35,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:35:35,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:35:35,032 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) [2022-01-30 22:35:35,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-30 22:35:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:35:35,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-30 22:35:35,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:35:35,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:35:35,326 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:35:35,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:35:35,364 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:35:35,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:35:35,404 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:35:35,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:35:35,649 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-30 22:35:35,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2022-01-30 22:35:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 12 proven. 91 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-01-30 22:35:35,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:35:35,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-30 22:35:35,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-30 22:35:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 12 proven. 91 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-01-30 22:35:35,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689274190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:35:35,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:35:35,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 25 [2022-01-30 22:35:35,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950566053] [2022-01-30 22:35:35,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:35:35,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-30 22:35:35,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:35:35,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-30 22:35:35,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-30 22:35:35,954 INFO L87 Difference]: Start difference. First operand 4128 states and 6466 transitions. Second operand has 25 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 17 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 16 states have call predecessors, (27), 16 states have call successors, (27) [2022-01-30 22:36:13,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:36:13,699 INFO L93 Difference]: Finished difference Result 54328 states and 87961 transitions. [2022-01-30 22:36:13,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 279 states. [2022-01-30 22:36:13,701 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 17 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 16 states have call predecessors, (27), 16 states have call successors, (27) Word has length 133 [2022-01-30 22:36:13,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:36:13,821 INFO L225 Difference]: With dead ends: 54328 [2022-01-30 22:36:13,822 INFO L226 Difference]: Without dead ends: 54326 [2022-01-30 22:36:13,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 288 SyntacticMatches, 10 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35547 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5535, Invalid=75405, Unknown=0, NotChecked=0, Total=80940 [2022-01-30 22:36:13,842 INFO L933 BasicCegarLoop]: 1214 mSDtfsCounter, 758 mSDsluCounter, 4005 mSDsCounter, 0 mSdLazyCounter, 22227 mSolverCounterSat, 4218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 5219 SdHoareTripleChecker+Invalid, 26445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4218 IncrementalHoareTripleChecker+Valid, 22227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:36:13,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 5219 Invalid, 26445 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4218 Valid, 22227 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2022-01-30 22:36:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54326 states. [2022-01-30 22:36:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54326 to 10522. [2022-01-30 22:36:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10522 states, 7463 states have (on average 1.4519630175532627) internal successors, (10836), 7515 states have internal predecessors, (10836), 2983 states have call successors, (2983), 76 states have call predecessors, (2983), 75 states have return successors, (2982), 2930 states have call predecessors, (2982), 2982 states have call successors, (2982) [2022-01-30 22:36:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10522 states to 10522 states and 16801 transitions. [2022-01-30 22:36:18,860 INFO L78 Accepts]: Start accepts. Automaton has 10522 states and 16801 transitions. Word has length 133 [2022-01-30 22:36:18,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:36:18,861 INFO L470 AbstractCegarLoop]: Abstraction has 10522 states and 16801 transitions. [2022-01-30 22:36:18,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 17 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 16 states have call predecessors, (27), 16 states have call successors, (27) [2022-01-30 22:36:18,861 INFO L276 IsEmpty]: Start isEmpty. Operand 10522 states and 16801 transitions. [2022-01-30 22:36:18,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-30 22:36:18,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:36:18,871 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:36:18,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-30 22:36:19,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-30 22:36:19,083 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:36:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:36:19,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2009517856, now seen corresponding path program 1 times [2022-01-30 22:36:19,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:36:19,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720736574] [2022-01-30 22:36:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:36:19,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:36:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:36:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:36:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:36:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:36:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:36:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:36:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:36:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:36:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:36:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:36:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:36:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-30 22:36:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:36:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-30 22:36:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-30 22:36:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-30 22:36:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-30 22:36:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-30 22:36:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 12 proven. 91 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-01-30 22:36:19,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:36:19,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720736574] [2022-01-30 22:36:19,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720736574] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:36:19,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827905497] [2022-01-30 22:36:19,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:36:19,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:36:19,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:36:19,343 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) [2022-01-30 22:36:19,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-30 22:36:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:19,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-30 22:36:19,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:36:19,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:36:19,834 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:36:19,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:36:19,899 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:36:19,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:36:19,988 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:36:19,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:36:20,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:36:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 63 proven. 103 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-30 22:36:20,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:36:21,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:36:21,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:36:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 12 proven. 91 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-01-30 22:36:21,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827905497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:36:21,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:36:21,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 44 [2022-01-30 22:36:21,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018662744] [2022-01-30 22:36:21,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:36:21,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-30 22:36:21,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:36:21,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-30 22:36:21,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1727, Unknown=0, NotChecked=0, Total=1892 [2022-01-30 22:36:21,328 INFO L87 Difference]: Start difference. First operand 10522 states and 16801 transitions. Second operand has 44 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 41 states have internal predecessors, (166), 32 states have call successors, (57), 5 states have call predecessors, (57), 2 states have return successors, (52), 30 states have call predecessors, (52), 30 states have call successors, (52) [2022-01-30 22:38:38,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:38:38,244 INFO L93 Difference]: Finished difference Result 20226 states and 32238 transitions. [2022-01-30 22:38:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-30 22:38:38,245 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 41 states have internal predecessors, (166), 32 states have call successors, (57), 5 states have call predecessors, (57), 2 states have return successors, (52), 30 states have call predecessors, (52), 30 states have call successors, (52) Word has length 133 [2022-01-30 22:38:38,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:38:38,278 INFO L225 Difference]: With dead ends: 20226 [2022-01-30 22:38:38,279 INFO L226 Difference]: Without dead ends: 20224 [2022-01-30 22:38:38,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 289 SyntacticMatches, 22 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13471 ImplicationChecksByTransitivity, 124.5s TimeCoverageRelationStatistics Valid=4846, Invalid=29122, Unknown=72, NotChecked=0, Total=34040 [2022-01-30 22:38:38,285 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 746 mSDsluCounter, 2073 mSDsCounter, 0 mSdLazyCounter, 8600 mSolverCounterSat, 2464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 2449 SdHoareTripleChecker+Invalid, 11676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2464 IncrementalHoareTripleChecker+Valid, 8600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 612 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:38:38,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 2449 Invalid, 11676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2464 Valid, 8600 Invalid, 0 Unknown, 612 Unchecked, 4.6s Time] [2022-01-30 22:38:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20224 states. [2022-01-30 22:38:42,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20224 to 10507. [2022-01-30 22:38:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10507 states, 7450 states have (on average 1.452751677852349) internal successors, (10823), 7499 states have internal predecessors, (10823), 2969 states have call successors, (2969), 88 states have call predecessors, (2969), 87 states have return successors, (2968), 2919 states have call predecessors, (2968), 2968 states have call successors, (2968) [2022-01-30 22:38:42,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10507 states to 10507 states and 16760 transitions. [2022-01-30 22:38:42,903 INFO L78 Accepts]: Start accepts. Automaton has 10507 states and 16760 transitions. Word has length 133 [2022-01-30 22:38:42,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:38:42,904 INFO L470 AbstractCegarLoop]: Abstraction has 10507 states and 16760 transitions. [2022-01-30 22:38:42,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 41 states have internal predecessors, (166), 32 states have call successors, (57), 5 states have call predecessors, (57), 2 states have return successors, (52), 30 states have call predecessors, (52), 30 states have call successors, (52) [2022-01-30 22:38:42,904 INFO L276 IsEmpty]: Start isEmpty. Operand 10507 states and 16760 transitions. [2022-01-30 22:38:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-30 22:38:42,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:38:42,915 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:38:42,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-30 22:38:43,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-30 22:38:43,131 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:38:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:38:43,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1655434619, now seen corresponding path program 8 times [2022-01-30 22:38:43,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:38:43,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814855151] [2022-01-30 22:38:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:38:43,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:38:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:38:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:38:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:38:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:38:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:38:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:38:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:38:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:38:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:38:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:38:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:38:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-30 22:38:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:38:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-30 22:38:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-30 22:38:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-30 22:38:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-30 22:38:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-30 22:38:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-01-30 22:38:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-01-30 22:38:43,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:38:43,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814855151] [2022-01-30 22:38:43,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814855151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:38:43,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711348500] [2022-01-30 22:38:43,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:38:43,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:38:43,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:38:43,376 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) [2022-01-30 22:38:43,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-30 22:38:43,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:38:43,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:38:43,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-30 22:38:43,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:38:43,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:38:43,688 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:38:43,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:38:43,728 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:38:43,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:38:44,070 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-30 22:38:44,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2022-01-30 22:38:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-01-30 22:38:44,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:38:44,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-30 22:38:44,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-30 22:38:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-01-30 22:38:44,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711348500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:38:44,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:38:44,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 27 [2022-01-30 22:38:44,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341432073] [2022-01-30 22:38:44,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:38:44,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-30 22:38:44,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:38:44,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-30 22:38:44,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-01-30 22:38:44,388 INFO L87 Difference]: Start difference. First operand 10507 states and 16760 transitions. Second operand has 27 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 24 states have internal predecessors, (99), 19 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 18 states have call predecessors, (28), 18 states have call successors, (28) [2022-01-30 22:40:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:40:45,360 INFO L93 Difference]: Finished difference Result 162866 states and 264353 transitions. [2022-01-30 22:40:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 665 states. [2022-01-30 22:40:45,361 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 24 states have internal predecessors, (99), 19 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 18 states have call predecessors, (28), 18 states have call successors, (28) Word has length 141 [2022-01-30 22:40:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:40:45,860 INFO L225 Difference]: With dead ends: 162866 [2022-01-30 22:40:45,860 INFO L226 Difference]: Without dead ends: 162864 [2022-01-30 22:40:45,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 305 SyntacticMatches, 9 SemanticMatches, 669 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211308 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=21173, Invalid=428397, Unknown=0, NotChecked=0, Total=449570 [2022-01-30 22:40:45,936 INFO L933 BasicCegarLoop]: 2848 mSDtfsCounter, 803 mSDsluCounter, 10416 mSDsCounter, 0 mSdLazyCounter, 66003 mSolverCounterSat, 8733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 13264 SdHoareTripleChecker+Invalid, 74736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 8733 IncrementalHoareTripleChecker+Valid, 66003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:40:45,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 13264 Invalid, 74736 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [8733 Valid, 66003 Invalid, 0 Unknown, 0 Unchecked, 33.4s Time] [2022-01-30 22:40:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162864 states. [2022-01-30 22:41:01,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162864 to 27799. [2022-01-30 22:41:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27799 states, 19694 states have (on average 1.4597847060018279) internal successors, (28749), 19826 states have internal predecessors, (28749), 8005 states have call successors, (8005), 100 states have call predecessors, (8005), 99 states have return successors, (8004), 7872 states have call predecessors, (8004), 8004 states have call successors, (8004) [2022-01-30 22:41:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27799 states to 27799 states and 44758 transitions. [2022-01-30 22:41:02,038 INFO L78 Accepts]: Start accepts. Automaton has 27799 states and 44758 transitions. Word has length 141 [2022-01-30 22:41:02,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:41:02,038 INFO L470 AbstractCegarLoop]: Abstraction has 27799 states and 44758 transitions. [2022-01-30 22:41:02,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 24 states have internal predecessors, (99), 19 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 18 states have call predecessors, (28), 18 states have call successors, (28) [2022-01-30 22:41:02,038 INFO L276 IsEmpty]: Start isEmpty. Operand 27799 states and 44758 transitions. [2022-01-30 22:41:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-30 22:41:02,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:41:02,060 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:41:02,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-30 22:41:02,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:41:02,261 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:41:02,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:41:02,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1682500221, now seen corresponding path program 2 times [2022-01-30 22:41:02,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:41:02,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728286890] [2022-01-30 22:41:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:41:02,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:41:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:41:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:41:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:41:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:41:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:41:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:41:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:41:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:41:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:41:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:41:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:41:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-30 22:41:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:41:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-30 22:41:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-30 22:41:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-30 22:41:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-30 22:41:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-30 22:41:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-01-30 22:41:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:41:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-01-30 22:41:02,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:41:02,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728286890] [2022-01-30 22:41:02,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728286890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:41:02,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638895645] [2022-01-30 22:41:02,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:41:02,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:41:02,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:41:02,560 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) [2022-01-30 22:41:02,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-30 22:41:02,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:41:02,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:41:02,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-30 22:41:02,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:41:02,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:41:03,064 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:41:03,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:41:03,138 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:41:03,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:41:03,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:41:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 48 proven. 131 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-01-30 22:41:03,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:41:04,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:41:04,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:41:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-01-30 22:41:04,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638895645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:41:04,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:41:04,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 47 [2022-01-30 22:41:04,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118025911] [2022-01-30 22:41:04,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:41:04,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-30 22:41:04,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:41:04,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-30 22:41:04,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2022-01-30 22:41:04,536 INFO L87 Difference]: Start difference. First operand 27799 states and 44758 transitions. Second operand has 47 states, 45 states have (on average 3.888888888888889) internal successors, (175), 44 states have internal predecessors, (175), 35 states have call successors, (60), 5 states have call predecessors, (60), 2 states have return successors, (55), 33 states have call predecessors, (55), 33 states have call successors, (55)