/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/loop-new/count_by_nondet.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 22:35:08,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 22:35:08,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 22:35:08,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 22:35:08,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 22:35:08,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 22:35:08,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 22:35:08,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 22:35:08,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 22:35:08,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 22:35:08,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 22:35:08,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 22:35:08,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 22:35:08,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 22:35:08,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 22:35:08,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 22:35:08,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 22:35:08,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 22:35:08,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 22:35:08,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 22:35:08,368 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 22:35:08,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 22:35:08,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 22:35:08,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 22:35:08,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 22:35:08,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 22:35:08,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 22:35:08,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 22:35:08,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 22:35:08,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 22:35:08,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 22:35:08,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 22:35:08,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 22:35:08,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 22:35:08,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 22:35:08,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 22:35:08,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 22:35:08,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 22:35:08,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 22:35:08,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 22:35:08,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 22:35:08,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 22:35:08,396 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 [2022-03-19 22:35:08,429 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 22:35:08,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 22:35:08,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 22:35:08,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 22:35:08,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 22:35:08,431 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 22:35:08,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 22:35:08,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 22:35:08,432 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 22:35:08,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 22:35:08,433 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 22:35:08,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 22:35:08,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 22:35:08,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 22:35:08,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 22:35:08,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 22:35:08,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 22:35:08,433 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 22:35:08,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 22:35:08,435 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 22:35:08,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 22:35:08,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 22:35:08,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 22:35:08,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 22:35:08,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:35:08,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 22:35:08,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 22:35:08,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 22:35:08,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 22:35:08,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 22:35:08,437 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 22:35:08,437 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 22:35:08,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 22:35:08,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 22:35:08,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 22:35:08,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 22:35:08,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 22:35:08,660 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 22:35:08,667 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 22:35:08,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_nondet.i [2022-03-19 22:35:08,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deba4d8b6/906b3dbf45c84ebca46cd347c21b48e1/FLAG01d54b23e [2022-03-19 22:35:09,082 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 22:35:09,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet.i [2022-03-19 22:35:09,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deba4d8b6/906b3dbf45c84ebca46cd347c21b48e1/FLAG01d54b23e [2022-03-19 22:35:09,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deba4d8b6/906b3dbf45c84ebca46cd347c21b48e1 [2022-03-19 22:35:09,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 22:35:09,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 22:35:09,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 22:35:09,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 22:35:09,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 22:35:09,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:35:09" (1/1) ... [2022-03-19 22:35:09,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f3e8bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:35:09, skipping insertion in model container [2022-03-19 22:35:09,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:35:09" (1/1) ... [2022-03-19 22:35:09,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 22:35:09,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 22:35:09,678 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet.i[891,904] [2022-03-19 22:35:09,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:35:09,703 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 22:35:09,715 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet.i[891,904] [2022-03-19 22:35:09,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:35:09,736 INFO L208 MainTranslator]: Completed translation [2022-03-19 22:35:09,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:35:09 WrapperNode [2022-03-19 22:35:09,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 22:35:09,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 22:35:09,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 22:35:09,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 22:35:09,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:35:09" (1/1) ... [2022-03-19 22:35:09,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:35:09" (1/1) ... [2022-03-19 22:35:09,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:35:09" (1/1) ... [2022-03-19 22:35:09,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:35:09" (1/1) ... [2022-03-19 22:35:09,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:35:09" (1/1) ... [2022-03-19 22:35:09,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:35:09" (1/1) ... [2022-03-19 22:35:09,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:35:09" (1/1) ... [2022-03-19 22:35:09,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 22:35:09,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 22:35:09,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 22:35:09,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 22:35:09,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:35:09" (1/1) ... [2022-03-19 22:35:09,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:35:09,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:09,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 22:35:09,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 22:35:09,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 22:35:09,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 22:35:09,849 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 22:35:09,850 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 22:35:09,850 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 22:35:09,851 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 22:35:09,851 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 22:35:09,851 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 22:35:09,851 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 22:35:09,851 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 22:35:09,851 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 22:35:09,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 22:35:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 22:35:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 22:35:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 22:35:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 22:35:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 22:35:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 22:35:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 22:35:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 22:35:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 22:35:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 22:35:09,916 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 22:35:09,917 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 22:35:10,045 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 22:35:10,066 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 22:35:10,067 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 22:35:10,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:35:10 BoogieIcfgContainer [2022-03-19 22:35:10,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 22:35:10,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 22:35:10,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 22:35:10,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 22:35:10,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:35:09" (1/3) ... [2022-03-19 22:35:10,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55382e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:35:10, skipping insertion in model container [2022-03-19 22:35:10,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:35:09" (2/3) ... [2022-03-19 22:35:10,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55382e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:35:10, skipping insertion in model container [2022-03-19 22:35:10,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:35:10" (3/3) ... [2022-03-19 22:35:10,092 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2022-03-19 22:35:10,096 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 22:35:10,097 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 22:35:10,165 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 22:35:10,172 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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 [2022-03-19 22:35:10,173 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 22:35:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:35:10,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 22:35:10,203 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:10,204 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:10,204 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:10,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:10,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2089905556, now seen corresponding path program 1 times [2022-03-19 22:35:10,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:10,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643714165] [2022-03-19 22:35:10,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:10,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:10,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:10,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:10,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643714165] [2022-03-19 22:35:10,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643714165] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:35:10,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:35:10,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 22:35:10,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060058391] [2022-03-19 22:35:10,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:35:10,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 22:35:10,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:10,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 22:35:10,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 22:35:10,444 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:35:10,519 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-03-19 22:35:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 22:35:10,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 22:35:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:35:10,525 INFO L225 Difference]: With dead ends: 36 [2022-03-19 22:35:10,526 INFO L226 Difference]: Without dead ends: 15 [2022-03-19 22:35:10,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 22:35:10,531 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:35:10,531 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:35:10,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-19 22:35:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-03-19 22:35:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:10,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-19 22:35:10,554 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-03-19 22:35:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:35:10,555 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-19 22:35:10,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:10,555 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-19 22:35:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 22:35:10,556 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:10,556 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:10,556 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 22:35:10,556 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:10,557 INFO L85 PathProgramCache]: Analyzing trace with hash -545306800, now seen corresponding path program 1 times [2022-03-19 22:35:10,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:10,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606985703] [2022-03-19 22:35:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:10,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:10,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:10,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:10,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606985703] [2022-03-19 22:35:10,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606985703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:10,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955993828] [2022-03-19 22:35:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:10,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:10,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:10,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:35:10,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 22:35:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:10,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 22:35:10,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:10,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:35:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:10,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955993828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:35:10,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:35:10,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-03-19 22:35:10,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619174838] [2022-03-19 22:35:10,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:35:10,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 22:35:10,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:10,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 22:35:10,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 22:35:10,865 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:35:10,946 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-03-19 22:35:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 22:35:10,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-19 22:35:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:35:10,947 INFO L225 Difference]: With dead ends: 21 [2022-03-19 22:35:10,947 INFO L226 Difference]: Without dead ends: 16 [2022-03-19 22:35:10,948 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-19 22:35:10,949 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:35:10,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:35:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-19 22:35:10,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-19 22:35:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-03-19 22:35:10,962 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2022-03-19 22:35:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:35:10,962 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-03-19 22:35:10,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-03-19 22:35:10,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 22:35:10,963 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:10,963 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:10,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 22:35:11,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:11,169 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:11,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1046323724, now seen corresponding path program 2 times [2022-03-19 22:35:11,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:11,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097500944] [2022-03-19 22:35:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:11,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:11,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:11,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:11,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097500944] [2022-03-19 22:35:11,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097500944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:11,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465172620] [2022-03-19 22:35:11,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:35:11,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:11,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:11,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:35:11,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 22:35:11,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:35:11,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:35:11,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 22:35:11,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:11,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:35:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:11,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465172620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:35:11,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:35:11,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-19 22:35:11,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561514838] [2022-03-19 22:35:11,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:35:11,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 22:35:11,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 22:35:11,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-19 22:35:11,550 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:11,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:35:11,702 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-03-19 22:35:11,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 22:35:11,702 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-19 22:35:11,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:35:11,704 INFO L225 Difference]: With dead ends: 33 [2022-03-19 22:35:11,704 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 22:35:11,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-03-19 22:35:11,707 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:35:11,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 43 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:35:11,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 22:35:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-19 22:35:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-03-19 22:35:11,717 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 15 [2022-03-19 22:35:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:35:11,718 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-03-19 22:35:11,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-03-19 22:35:11,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 22:35:11,720 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:11,720 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:11,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 22:35:11,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 22:35:11,940 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:11,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1174989060, now seen corresponding path program 3 times [2022-03-19 22:35:11,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:11,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40162024] [2022-03-19 22:35:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:11,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:12,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:12,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:12,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40162024] [2022-03-19 22:35:12,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40162024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:12,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240697660] [2022-03-19 22:35:12,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:35:12,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:12,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:12,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:35:12,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 22:35:12,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-19 22:35:12,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:35:12,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 22:35:12,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:12,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:35:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:12,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240697660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:35:12,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:35:12,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-19 22:35:12,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794263576] [2022-03-19 22:35:12,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:35:12,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 22:35:12,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:12,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 22:35:12,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-03-19 22:35:12,378 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:35:12,644 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-03-19 22:35:12,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 22:35:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 22:35:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:35:12,645 INFO L225 Difference]: With dead ends: 53 [2022-03-19 22:35:12,645 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 22:35:12,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=400, Invalid=1006, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 22:35:12,647 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:35:12,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 48 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:35:12,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 22:35:12,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-03-19 22:35:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-03-19 22:35:12,653 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 23 [2022-03-19 22:35:12,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:35:12,653 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-03-19 22:35:12,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-03-19 22:35:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 22:35:12,655 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:12,655 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:12,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 22:35:12,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:12,872 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:12,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1349923036, now seen corresponding path program 4 times [2022-03-19 22:35:12,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:12,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463262895] [2022-03-19 22:35:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:12,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:13,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:13,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:13,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463262895] [2022-03-19 22:35:13,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463262895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:13,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856059018] [2022-03-19 22:35:13,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:35:13,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:13,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:13,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:35:13,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 22:35:13,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:35:13,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:35:13,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 22:35:13,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:13,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:35:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:13,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856059018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:35:13,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:35:13,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-19 22:35:13,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124239455] [2022-03-19 22:35:13,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:35:13,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 22:35:13,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:13,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 22:35:13,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=866, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 22:35:13,756 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 35 states have internal predecessors, (71), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:14,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:35:14,429 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2022-03-19 22:35:14,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 22:35:14,430 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 35 states have internal predecessors, (71), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-19 22:35:14,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:35:14,431 INFO L225 Difference]: With dead ends: 93 [2022-03-19 22:35:14,431 INFO L226 Difference]: Without dead ends: 73 [2022-03-19 22:35:14,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1544, Invalid=3286, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 22:35:14,434 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:35:14,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 48 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:35:14,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-19 22:35:14,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-03-19 22:35:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-03-19 22:35:14,443 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 39 [2022-03-19 22:35:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:35:14,443 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-03-19 22:35:14,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 35 states have internal predecessors, (71), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-03-19 22:35:14,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 22:35:14,445 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:14,445 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:14,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 22:35:14,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:14,668 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:14,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:14,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1021650076, now seen corresponding path program 5 times [2022-03-19 22:35:14,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:14,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734504748] [2022-03-19 22:35:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:14,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:15,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:15,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:15,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734504748] [2022-03-19 22:35:15,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734504748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:15,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314569056] [2022-03-19 22:35:15,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:35:15,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:15,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:15,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:35:15,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 22:35:15,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-03-19 22:35:15,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:35:15,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 22:35:15,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:15,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:35:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:16,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314569056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:35:16,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:35:16,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-19 22:35:16,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621324074] [2022-03-19 22:35:16,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:35:16,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-19 22:35:16,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:16,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-19 22:35:16,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2092, Invalid=2738, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 22:35:16,867 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 67 states have internal predecessors, (135), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:35:18,776 INFO L93 Difference]: Finished difference Result 173 states and 204 transitions. [2022-03-19 22:35:18,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 22:35:18,777 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 67 states have internal predecessors, (135), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-19 22:35:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:35:18,778 INFO L225 Difference]: With dead ends: 173 [2022-03-19 22:35:18,778 INFO L226 Difference]: Without dead ends: 137 [2022-03-19 22:35:18,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3067 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6136, Invalid=11686, Unknown=0, NotChecked=0, Total=17822 [2022-03-19 22:35:18,783 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 278 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 22:35:18,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 63 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 22:35:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-19 22:35:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-03-19 22:35:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 131 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2022-03-19 22:35:18,802 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 71 [2022-03-19 22:35:18,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:35:18,803 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2022-03-19 22:35:18,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 67 states have internal predecessors, (135), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:18,803 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2022-03-19 22:35:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 22:35:18,805 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:18,805 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:18,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 22:35:19,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:19,016 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:19,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1517941732, now seen corresponding path program 6 times [2022-03-19 22:35:19,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:19,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064524648] [2022-03-19 22:35:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:19,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:20,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:20,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:20,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064524648] [2022-03-19 22:35:20,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064524648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:20,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080066116] [2022-03-19 22:35:20,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:35:20,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:20,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:20,592 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:35:20,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 22:35:20,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2022-03-19 22:35:20,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:35:20,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-19 22:35:20,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:21,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:35:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:25,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080066116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:35:25,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:35:25,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-19 22:35:25,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816061225] [2022-03-19 22:35:25,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:35:25,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-03-19 22:35:25,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:25,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-03-19 22:35:25,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8268, Invalid=9554, Unknown=0, NotChecked=0, Total=17822 [2022-03-19 22:35:25,093 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand has 134 states, 134 states have (on average 1.962686567164179) internal successors, (263), 131 states have internal predecessors, (263), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:30,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:35:30,857 INFO L93 Difference]: Finished difference Result 333 states and 396 transitions. [2022-03-19 22:35:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-19 22:35:30,857 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.962686567164179) internal successors, (263), 131 states have internal predecessors, (263), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-03-19 22:35:30,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:35:30,861 INFO L225 Difference]: With dead ends: 333 [2022-03-19 22:35:30,861 INFO L226 Difference]: Without dead ends: 265 [2022-03-19 22:35:30,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11275 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=24536, Invalid=43846, Unknown=0, NotChecked=0, Total=68382 [2022-03-19 22:35:30,870 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 518 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:35:30,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 78 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 22:35:30,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-19 22:35:30,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2022-03-19 22:35:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.0038610038610039) internal successors, (260), 259 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:30,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 264 transitions. [2022-03-19 22:35:30,892 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 264 transitions. Word has length 135 [2022-03-19 22:35:30,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:35:30,892 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 264 transitions. [2022-03-19 22:35:30,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.962686567164179) internal successors, (263), 131 states have internal predecessors, (263), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 264 transitions. [2022-03-19 22:35:30,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-03-19 22:35:30,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:30,895 INFO L499 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:30,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-19 22:35:31,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:31,112 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:31,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:31,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1171512092, now seen corresponding path program 7 times [2022-03-19 22:35:31,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:31,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805853506] [2022-03-19 22:35:31,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:31,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:36,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:36,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:36,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805853506] [2022-03-19 22:35:36,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805853506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:36,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422222486] [2022-03-19 22:35:36,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:35:36,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:36,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:36,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:35:36,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 22:35:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:36,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 130 conjunts are in the unsatisfiable core [2022-03-19 22:35:36,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:37,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:35:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:52,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422222486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:35:52,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:35:52,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 131, 131] total 262 [2022-03-19 22:35:52,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307549926] [2022-03-19 22:35:52,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:35:52,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 262 states [2022-03-19 22:35:52,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:52,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 262 interpolants. [2022-03-19 22:35:52,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32908, Invalid=35474, Unknown=0, NotChecked=0, Total=68382 [2022-03-19 22:35:52,439 INFO L87 Difference]: Start difference. First operand 264 states and 264 transitions. Second operand has 262 states, 262 states have (on average 1.9809160305343512) internal successors, (519), 259 states have internal predecessors, (519), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:36:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:36:14,215 INFO L93 Difference]: Finished difference Result 653 states and 780 transitions. [2022-03-19 22:36:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2022-03-19 22:36:14,216 INFO L78 Accepts]: Start accepts. Automaton has has 262 states, 262 states have (on average 1.9809160305343512) internal successors, (519), 259 states have internal predecessors, (519), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-03-19 22:36:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:36:14,220 INFO L225 Difference]: With dead ends: 653 [2022-03-19 22:36:14,220 INFO L226 Difference]: Without dead ends: 521 [2022-03-19 22:36:14,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 397 SyntacticMatches, 1 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43051 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=98200, Invalid=169606, Unknown=0, NotChecked=0, Total=267806 [2022-03-19 22:36:14,236 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 1341 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 22:36:14,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 68 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 22:36:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-19 22:36:14,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 520. [2022-03-19 22:36:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 515 states have (on average 1.0019417475728156) internal successors, (516), 515 states have internal predecessors, (516), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:36:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 520 transitions. [2022-03-19 22:36:14,279 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 520 transitions. Word has length 263 [2022-03-19 22:36:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:36:14,280 INFO L478 AbstractCegarLoop]: Abstraction has 520 states and 520 transitions. [2022-03-19 22:36:14,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 262 states, 262 states have (on average 1.9809160305343512) internal successors, (519), 259 states have internal predecessors, (519), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:36:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 520 transitions. [2022-03-19 22:36:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-03-19 22:36:14,297 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:36:14,297 INFO L499 BasicCegarLoop]: trace histogram [254, 254, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:36:14,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 22:36:14,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:36:14,498 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:36:14,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:36:14,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1117747484, now seen corresponding path program 8 times [2022-03-19 22:36:14,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:36:14,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075300647] [2022-03-19 22:36:14,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:36:14,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:36:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:35,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:36:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:36:35,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:36:35,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075300647] [2022-03-19 22:36:35,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075300647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:36:35,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400329264] [2022-03-19 22:36:35,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:36:35,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:36:35,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:36:35,432 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:36:35,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 22:36:35,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:36:35,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:36:35,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 2843 conjuncts, 258 conjunts are in the unsatisfiable core [2022-03-19 22:36:35,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:36:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:36:36,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:37:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:37:34,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400329264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:37:34,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:37:34,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [260, 259, 259] total 518 [2022-03-19 22:37:34,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23232626] [2022-03-19 22:37:34,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:37:34,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 518 states [2022-03-19 22:37:34,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:37:34,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 518 interpolants. [2022-03-19 22:37:34,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131340, Invalid=136466, Unknown=0, NotChecked=0, Total=267806 [2022-03-19 22:37:34,948 INFO L87 Difference]: Start difference. First operand 520 states and 520 transitions. Second operand has 518 states, 518 states have (on average 1.9903474903474903) internal successors, (1031), 515 states have internal predecessors, (1031), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:39:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:39:09,710 INFO L93 Difference]: Finished difference Result 1293 states and 1548 transitions. [2022-03-19 22:39:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 515 states. [2022-03-19 22:39:09,712 INFO L78 Accepts]: Start accepts. Automaton has has 518 states, 518 states have (on average 1.9903474903474903) internal successors, (1031), 515 states have internal predecessors, (1031), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 519 [2022-03-19 22:39:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:39:09,717 INFO L225 Difference]: With dead ends: 1293 [2022-03-19 22:39:09,717 INFO L226 Difference]: Without dead ends: 1033 [2022-03-19 22:39:09,791 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1810 GetRequests, 781 SyntacticMatches, 1 SemanticMatches, 1028 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168043 ImplicationChecksByTransitivity, 154.7s TimeCoverageRelationStatistics Valid=392984, Invalid=666886, Unknown=0, NotChecked=0, Total=1059870 [2022-03-19 22:39:09,794 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 2337 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 1286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2337 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1286 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:39:09,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2337 Valid, 58 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1286 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 22:39:09,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-03-19 22:39:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1032. [2022-03-19 22:39:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1027 states have (on average 1.0009737098344693) internal successors, (1028), 1027 states have internal predecessors, (1028), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:39:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1032 transitions. [2022-03-19 22:39:09,827 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1032 transitions. Word has length 519 [2022-03-19 22:39:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:39:09,827 INFO L478 AbstractCegarLoop]: Abstraction has 1032 states and 1032 transitions. [2022-03-19 22:39:09,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 518 states, 518 states have (on average 1.9903474903474903) internal successors, (1031), 515 states have internal predecessors, (1031), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:39:09,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1032 transitions. [2022-03-19 22:39:09,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1032 [2022-03-19 22:39:09,855 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:39:09,855 INFO L499 BasicCegarLoop]: trace histogram [510, 510, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:39:09,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 22:39:10,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 22:39:10,071 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:39:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:39:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash 754365724, now seen corresponding path program 9 times [2022-03-19 22:39:10,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:39:10,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091704243] [2022-03-19 22:39:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:39:10,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:39:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:32,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:40:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:40:32,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:40:32,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091704243] [2022-03-19 22:40:32,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091704243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:40:32,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318885731] [2022-03-19 22:40:32,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:40:32,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:40:32,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:40:32,223 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:40:32,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 22:40:36,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 511 check-sat command(s) [2022-03-19 22:40:36,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:40:36,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 5659 conjuncts, 514 conjunts are in the unsatisfiable core [2022-03-19 22:40:36,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:40:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:40:38,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:44:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:44:36,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318885731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:44:36,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:44:36,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [516, 515, 515] total 1030 [2022-03-19 22:44:36,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964838100] [2022-03-19 22:44:36,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:44:36,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 1030 states [2022-03-19 22:44:36,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:44:36,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1030 interpolants. [2022-03-19 22:44:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524812, Invalid=535058, Unknown=0, NotChecked=0, Total=1059870 [2022-03-19 22:44:36,567 INFO L87 Difference]: Start difference. First operand 1032 states and 1032 transitions. Second operand has 1030 states, 1030 states have (on average 1.9951456310679612) internal successors, (2055), 1027 states have internal predecessors, (2055), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)