/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-04 21:40:12,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-04 21:40:12,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-04 21:40:12,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-04 21:40:12,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-04 21:40:12,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-04 21:40:12,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-04 21:40:12,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-04 21:40:12,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-04 21:40:12,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-04 21:40:12,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-04 21:40:12,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-04 21:40:12,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-04 21:40:12,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-04 21:40:12,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-04 21:40:12,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-04 21:40:12,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-04 21:40:12,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-04 21:40:12,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-04 21:40:12,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-04 21:40:12,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-04 21:40:12,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-04 21:40:12,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-04 21:40:12,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-04 21:40:12,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-04 21:40:12,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-04 21:40:12,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-04 21:40:12,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-04 21:40:12,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-04 21:40:12,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-04 21:40:12,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-04 21:40:12,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-04 21:40:12,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-04 21:40:12,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-04 21:40:12,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-04 21:40:12,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-04 21:40:12,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-04 21:40:12,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-04 21:40:12,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-04 21:40:12,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-04 21:40:12,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-04 21:40:12,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-04 21:40:13,026 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-04 21:40:13,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-04 21:40:13,027 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-04 21:40:13,027 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-04 21:40:13,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-04 21:40:13,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-04 21:40:13,029 INFO L138 SettingsManager]: * Use SBE=true [2021-06-04 21:40:13,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-04 21:40:13,029 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-04 21:40:13,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-04 21:40:13,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-04 21:40:13,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-04 21:40:13,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-04 21:40:13,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-04 21:40:13,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-04 21:40:13,030 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-04 21:40:13,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-04 21:40:13,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-04 21:40:13,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-04 21:40:13,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-04 21:40:13,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-04 21:40:13,031 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-04 21:40:13,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-04 21:40:13,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-04 21:40:13,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-04 21:40:13,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-04 21:40:13,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-04 21:40:13,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-04 21:40:13,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-04 21:40:13,033 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-04 21:40:13,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-04 21:40:13,033 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-04 21:40:13,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-04 21:40:13,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-04 21:40:13,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-04 21:40:13,352 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-04 21:40:13,355 INFO L275 PluginConnector]: CDTParser initialized [2021-06-04 21:40:13,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-06-04 21:40:13,409 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9cac235d/ff8071a40dc34a56bdb79473ba7e6b60/FLAG1c39142e2 [2021-06-04 21:40:13,873 INFO L306 CDTParser]: Found 1 translation units. [2021-06-04 21:40:13,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-06-04 21:40:13,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9cac235d/ff8071a40dc34a56bdb79473ba7e6b60/FLAG1c39142e2 [2021-06-04 21:40:13,906 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9cac235d/ff8071a40dc34a56bdb79473ba7e6b60 [2021-06-04 21:40:13,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-04 21:40:13,911 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-04 21:40:13,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-04 21:40:13,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-04 21:40:13,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-04 21:40:13,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 09:40:13" (1/1) ... [2021-06-04 21:40:13,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6e94a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13, skipping insertion in model container [2021-06-04 21:40:13,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 09:40:13" (1/1) ... [2021-06-04 21:40:13,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-04 21:40:13,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-04 21:40:14,323 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2021-06-04 21:40:14,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-04 21:40:14,337 INFO L203 MainTranslator]: Completed pre-run [2021-06-04 21:40:14,363 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2021-06-04 21:40:14,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-04 21:40:14,419 INFO L208 MainTranslator]: Completed translation [2021-06-04 21:40:14,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:14 WrapperNode [2021-06-04 21:40:14,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-04 21:40:14,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-04 21:40:14,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-04 21:40:14,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-04 21:40:14,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:14" (1/1) ... [2021-06-04 21:40:14,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:14" (1/1) ... [2021-06-04 21:40:14,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-04 21:40:14,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-04 21:40:14,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-04 21:40:14,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-04 21:40:14,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:14" (1/1) ... [2021-06-04 21:40:14,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:14" (1/1) ... [2021-06-04 21:40:14,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:14" (1/1) ... [2021-06-04 21:40:14,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:14" (1/1) ... [2021-06-04 21:40:14,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:14" (1/1) ... [2021-06-04 21:40:14,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:14" (1/1) ... [2021-06-04 21:40:14,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:14" (1/1) ... [2021-06-04 21:40:14,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-04 21:40:14,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-04 21:40:14,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-04 21:40:14,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-04 21:40:14,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-04 21:40:14,570 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-04 21:40:14,570 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-04 21:40:14,571 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-04 21:40:14,571 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-04 21:40:14,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-04 21:40:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-04 21:40:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-04 21:40:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-04 21:40:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-04 21:40:14,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-04 21:40:14,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-04 21:40:14,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-04 21:40:14,575 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-04 21:40:14,897 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-04 21:40:14,897 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-04 21:40:14,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 09:40:14 BoogieIcfgContainer [2021-06-04 21:40:14,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-04 21:40:14,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-04 21:40:14,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-04 21:40:14,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-04 21:40:14,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 09:40:13" (1/3) ... [2021-06-04 21:40:14,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db7ba7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 09:40:14, skipping insertion in model container [2021-06-04 21:40:14,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:14" (2/3) ... [2021-06-04 21:40:14,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db7ba7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 09:40:14, skipping insertion in model container [2021-06-04 21:40:14,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 09:40:14" (3/3) ... [2021-06-04 21:40:14,907 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2021-06-04 21:40:14,912 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-04 21:40:14,913 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-04 21:40:14,913 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-04 21:40:14,913 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-04 21:40:14,947 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,947 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,947 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,948 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,948 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,948 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,949 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,949 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,949 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,950 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,950 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,950 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,950 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,950 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,951 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,951 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,951 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,951 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,951 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,952 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,952 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,956 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,957 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,957 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,958 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,958 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,958 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,958 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,958 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,958 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,959 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,959 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,960 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,960 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,960 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,960 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,960 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,960 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,961 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,961 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,961 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,961 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,961 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,961 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,962 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,962 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,962 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,962 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,962 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,962 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,963 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,963 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,964 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,964 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,966 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,966 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,976 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,976 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,976 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,976 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,976 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,976 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,979 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-04 21:40:14,997 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-04 21:40:15,023 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-04 21:40:15,023 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-04 21:40:15,023 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-04 21:40:15,023 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-04 21:40:15,024 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-04 21:40:15,024 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-04 21:40:15,024 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-04 21:40:15,024 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-04 21:40:15,035 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-04 21:40:15,124 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-04 21:40:15,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:15,145 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:15,145 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:15,151 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-04 21:40:15,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:15,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511594344] [2021-06-04 21:40:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:15,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:15,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511594344] [2021-06-04 21:40:15,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511594344] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:40:15,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:40:15,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-04 21:40:15,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945050786] [2021-06-04 21:40:15,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-04 21:40:15,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:15,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-04 21:40:15,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-04 21:40:15,493 INFO L87 Difference]: Start difference. First operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:15,723 INFO L93 Difference]: Finished difference Result 3294 states and 9568 transitions. [2021-06-04 21:40:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-04 21:40:15,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-04 21:40:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:15,743 INFO L225 Difference]: With dead ends: 3294 [2021-06-04 21:40:15,743 INFO L226 Difference]: Without dead ends: 1248 [2021-06-04 21:40:15,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:40:15,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-04 21:40:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-06-04 21:40:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-04 21:40:15,825 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-06-04 21:40:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:15,826 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-04 21:40:15,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-04 21:40:15,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-04 21:40:15,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:15,829 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:15,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-04 21:40:15,829 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:15,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:15,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-04 21:40:15,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:15,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134274422] [2021-06-04 21:40:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:15,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:15,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134274422] [2021-06-04 21:40:15,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134274422] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:40:15,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:40:15,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-04 21:40:15,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519856661] [2021-06-04 21:40:15,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-04 21:40:15,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:15,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-04 21:40:15,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-04 21:40:15,954 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:16,129 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-04 21:40:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-04 21:40:16,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-04 21:40:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:16,136 INFO L225 Difference]: With dead ends: 1302 [2021-06-04 21:40:16,136 INFO L226 Difference]: Without dead ends: 920 [2021-06-04 21:40:16,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:40:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-04 21:40:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-04 21:40:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-04 21:40:16,172 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-04 21:40:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:16,173 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-04 21:40:16,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-04 21:40:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:40:16,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:16,176 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:16,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-04 21:40:16,176 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:16,183 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-06-04 21:40:16,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:16,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451999174] [2021-06-04 21:40:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:16,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:16,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451999174] [2021-06-04 21:40:16,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451999174] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:40:16,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:40:16,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:40:16,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820026584] [2021-06-04 21:40:16,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:40:16,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:16,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:40:16,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:40:16,333 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:16,582 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-06-04 21:40:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-04 21:40:16,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-04 21:40:16,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:16,587 INFO L225 Difference]: With dead ends: 1304 [2021-06-04 21:40:16,587 INFO L226 Difference]: Without dead ends: 1044 [2021-06-04 21:40:16,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-04 21:40:16,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-06-04 21:40:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-04 21:40:16,609 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-04 21:40:16,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:16,610 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-04 21:40:16,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-04 21:40:16,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:40:16,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:16,613 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:16,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-04 21:40:16,614 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:16,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:16,615 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-06-04 21:40:16,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:16,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634671600] [2021-06-04 21:40:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:16,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:16,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634671600] [2021-06-04 21:40:16,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634671600] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:40:16,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:40:16,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-04 21:40:16,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845854875] [2021-06-04 21:40:16,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-04 21:40:16,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:16,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-04 21:40:16,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-04 21:40:16,788 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:16,941 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-04 21:40:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-04 21:40:16,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-04 21:40:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:16,952 INFO L225 Difference]: With dead ends: 1772 [2021-06-04 21:40:16,953 INFO L226 Difference]: Without dead ends: 1505 [2021-06-04 21:40:16,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:16,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-04 21:40:16,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-04 21:40:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.6981519507186857) internal successors, (2628), 974 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-04 21:40:16,980 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-04 21:40:16,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:16,982 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-04 21:40:16,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-04 21:40:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:40:16,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:16,984 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:16,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-04 21:40:16,984 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:16,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:16,984 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-06-04 21:40:16,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:16,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278062008] [2021-06-04 21:40:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:17,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:17,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278062008] [2021-06-04 21:40:17,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278062008] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:40:17,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:40:17,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:40:17,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616847277] [2021-06-04 21:40:17,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:40:17,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:17,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:40:17,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:40:17,069 INFO L87 Difference]: Start difference. First operand 975 states and 2628 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:17,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:17,223 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-04 21:40:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-04 21:40:17,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-04 21:40:17,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:17,232 INFO L225 Difference]: With dead ends: 2211 [2021-06-04 21:40:17,232 INFO L226 Difference]: Without dead ends: 1944 [2021-06-04 21:40:17,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:17,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-04 21:40:17,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-04 21:40:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.769982238010657) internal successors, (3119), 1126 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-04 21:40:17,315 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-04 21:40:17,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:17,315 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-04 21:40:17,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:17,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-04 21:40:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:40:17,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:17,317 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:17,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-04 21:40:17,317 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:17,318 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-06-04 21:40:17,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:17,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584936371] [2021-06-04 21:40:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:17,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:17,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584936371] [2021-06-04 21:40:17,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584936371] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:40:17,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:40:17,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:40:17,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458840469] [2021-06-04 21:40:17,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:40:17,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:17,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:40:17,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:40:17,445 INFO L87 Difference]: Start difference. First operand 1127 states and 3119 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:17,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:17,674 INFO L93 Difference]: Finished difference Result 1671 states and 4527 transitions. [2021-06-04 21:40:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-04 21:40:17,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-04 21:40:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:17,681 INFO L225 Difference]: With dead ends: 1671 [2021-06-04 21:40:17,681 INFO L226 Difference]: Without dead ends: 1173 [2021-06-04 21:40:17,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-04 21:40:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 922. [2021-06-04 21:40:17,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.732899022801303) internal successors, (2517), 921 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-06-04 21:40:17,706 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-06-04 21:40:17,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:17,706 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-06-04 21:40:17,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-06-04 21:40:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-04 21:40:17,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:17,708 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:17,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-04 21:40:17,709 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:17,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:17,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-06-04 21:40:17,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:17,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184023739] [2021-06-04 21:40:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:17,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:17,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184023739] [2021-06-04 21:40:17,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184023739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:17,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812525115] [2021-06-04 21:40:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:17,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-04 21:40:17,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:18,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812525115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:18,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:18,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-04 21:40:18,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117944649] [2021-06-04 21:40:18,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:40:18,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:18,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:40:18,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:40:18,175 INFO L87 Difference]: Start difference. First operand 922 states and 2517 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:18,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:18,381 INFO L93 Difference]: Finished difference Result 1526 states and 4027 transitions. [2021-06-04 21:40:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-04 21:40:18,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-04 21:40:18,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:18,390 INFO L225 Difference]: With dead ends: 1526 [2021-06-04 21:40:18,390 INFO L226 Difference]: Without dead ends: 1256 [2021-06-04 21:40:18,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:40:18,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-04 21:40:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1113. [2021-06-04 21:40:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.741007194244604) internal successors, (3048), 1112 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3048 transitions. [2021-06-04 21:40:18,420 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3048 transitions. Word has length 45 [2021-06-04 21:40:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:18,420 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3048 transitions. [2021-06-04 21:40:18,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3048 transitions. [2021-06-04 21:40:18,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-04 21:40:18,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:18,422 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:18,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-04 21:40:18,646 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:18,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:18,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-06-04 21:40:18,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:18,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597683073] [2021-06-04 21:40:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:18,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:18,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597683073] [2021-06-04 21:40:18,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597683073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:18,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702619723] [2021-06-04 21:40:18,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:18,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:18,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:18,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-04 21:40:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:19,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702619723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:19,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:19,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-04 21:40:19,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025534961] [2021-06-04 21:40:19,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-04 21:40:19,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-04 21:40:19,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:40:19,033 INFO L87 Difference]: Start difference. First operand 1113 states and 3048 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:19,223 INFO L93 Difference]: Finished difference Result 2408 states and 6431 transitions. [2021-06-04 21:40:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-04 21:40:19,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-04 21:40:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:19,232 INFO L225 Difference]: With dead ends: 2408 [2021-06-04 21:40:19,233 INFO L226 Difference]: Without dead ends: 2138 [2021-06-04 21:40:19,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:40:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-04 21:40:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1293. [2021-06-04 21:40:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 2.791795665634675) internal successors, (3607), 1292 states have internal predecessors, (3607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3607 transitions. [2021-06-04 21:40:19,293 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3607 transitions. Word has length 45 [2021-06-04 21:40:19,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:19,293 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 3607 transitions. [2021-06-04 21:40:19,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3607 transitions. [2021-06-04 21:40:19,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-04 21:40:19,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:19,295 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:19,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:19,519 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:19,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:19,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-06-04 21:40:19,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:19,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984097800] [2021-06-04 21:40:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:19,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:19,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984097800] [2021-06-04 21:40:19,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984097800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:19,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398155034] [2021-06-04 21:40:19,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:19,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-04 21:40:19,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:19,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-04 21:40:19,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:19,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398155034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:19,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:19,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-04 21:40:19,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045949155] [2021-06-04 21:40:19,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:40:19,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:19,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:40:19,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:40:19,850 INFO L87 Difference]: Start difference. First operand 1293 states and 3607 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:20,220 INFO L93 Difference]: Finished difference Result 2196 states and 5861 transitions. [2021-06-04 21:40:20,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:40:20,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-04 21:40:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:20,227 INFO L225 Difference]: With dead ends: 2196 [2021-06-04 21:40:20,227 INFO L226 Difference]: Without dead ends: 1621 [2021-06-04 21:40:20,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:40:20,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-04 21:40:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1328. [2021-06-04 21:40:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 2.7754333082140166) internal successors, (3683), 1327 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-06-04 21:40:20,257 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-06-04 21:40:20,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:20,257 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-06-04 21:40:20,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:20,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-06-04 21:40:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:40:20,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:20,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:20,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:20,481 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:20,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1229914011, now seen corresponding path program 1 times [2021-06-04 21:40:20,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:20,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751575967] [2021-06-04 21:40:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:20,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:20,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751575967] [2021-06-04 21:40:20,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751575967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:20,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998805869] [2021-06-04 21:40:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:40:20,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:20,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998805869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:20,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:20,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-04 21:40:20,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174547022] [2021-06-04 21:40:20,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:40:20,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:20,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:40:20,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:20,879 INFO L87 Difference]: Start difference. First operand 1328 states and 3683 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:21,160 INFO L93 Difference]: Finished difference Result 2068 states and 5483 transitions. [2021-06-04 21:40:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:40:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-04 21:40:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:21,168 INFO L225 Difference]: With dead ends: 2068 [2021-06-04 21:40:21,168 INFO L226 Difference]: Without dead ends: 1734 [2021-06-04 21:40:21,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:40:21,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-04 21:40:21,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1413. [2021-06-04 21:40:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.7287535410764874) internal successors, (3853), 1412 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:21,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3853 transitions. [2021-06-04 21:40:21,199 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3853 transitions. Word has length 50 [2021-06-04 21:40:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:21,199 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3853 transitions. [2021-06-04 21:40:21,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:21,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3853 transitions. [2021-06-04 21:40:21,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:40:21,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:21,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:21,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:21,417 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:21,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1568318167, now seen corresponding path program 2 times [2021-06-04 21:40:21,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:21,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344716893] [2021-06-04 21:40:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:21,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:21,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344716893] [2021-06-04 21:40:21,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344716893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:21,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398694510] [2021-06-04 21:40:21,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:21,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:21,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:21,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:40:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:21,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398694510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:21,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:21,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-04 21:40:21,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801347941] [2021-06-04 21:40:21,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-04 21:40:21,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:21,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-04 21:40:21,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:40:21,777 INFO L87 Difference]: Start difference. First operand 1413 states and 3853 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:21,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:21,955 INFO L93 Difference]: Finished difference Result 2061 states and 5277 transitions. [2021-06-04 21:40:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-04 21:40:21,956 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-04 21:40:21,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:21,962 INFO L225 Difference]: With dead ends: 2061 [2021-06-04 21:40:21,963 INFO L226 Difference]: Without dead ends: 1791 [2021-06-04 21:40:21,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:40:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-04 21:40:21,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1428. [2021-06-04 21:40:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.721093202522775) internal successors, (3883), 1427 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3883 transitions. [2021-06-04 21:40:21,994 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3883 transitions. Word has length 50 [2021-06-04 21:40:21,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:21,994 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3883 transitions. [2021-06-04 21:40:21,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:21,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3883 transitions. [2021-06-04 21:40:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:40:21,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:21,996 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:22,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-04 21:40:22,213 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1011406841, now seen corresponding path program 3 times [2021-06-04 21:40:22,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:22,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450659006] [2021-06-04 21:40:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:22,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:22,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450659006] [2021-06-04 21:40:22,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450659006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:22,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566392420] [2021-06-04 21:40:22,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:22,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:40:22,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:22,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:40:22,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:22,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566392420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:22,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:22,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-04 21:40:22,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986393344] [2021-06-04 21:40:22,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:40:22,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:40:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:40:22,570 INFO L87 Difference]: Start difference. First operand 1428 states and 3883 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:22,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:22,842 INFO L93 Difference]: Finished difference Result 2006 states and 5197 transitions. [2021-06-04 21:40:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:40:22,843 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-04 21:40:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:22,847 INFO L225 Difference]: With dead ends: 2006 [2021-06-04 21:40:22,847 INFO L226 Difference]: Without dead ends: 1736 [2021-06-04 21:40:22,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:40:22,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-04 21:40:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1428. [2021-06-04 21:40:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.7245970567624385) internal successors, (3888), 1427 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3888 transitions. [2021-06-04 21:40:22,877 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3888 transitions. Word has length 50 [2021-06-04 21:40:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:22,878 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3888 transitions. [2021-06-04 21:40:22,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3888 transitions. [2021-06-04 21:40:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:40:22,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:22,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:23,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:23,103 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:23,104 INFO L82 PathProgramCache]: Analyzing trace with hash -21240761, now seen corresponding path program 4 times [2021-06-04 21:40:23,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:23,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369425598] [2021-06-04 21:40:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:23,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:23,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369425598] [2021-06-04 21:40:23,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369425598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:23,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788226834] [2021-06-04 21:40:23,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:23,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:23,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:23,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:40:23,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:23,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788226834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:23,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:23,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-04 21:40:23,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610823087] [2021-06-04 21:40:23,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-04 21:40:23,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:23,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-04 21:40:23,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:40:23,411 INFO L87 Difference]: Start difference. First operand 1428 states and 3888 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:23,662 INFO L93 Difference]: Finished difference Result 2798 states and 7421 transitions. [2021-06-04 21:40:23,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-04 21:40:23,662 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-04 21:40:23,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:23,680 INFO L225 Difference]: With dead ends: 2798 [2021-06-04 21:40:23,680 INFO L226 Difference]: Without dead ends: 2528 [2021-06-04 21:40:23,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 192.1ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:40:23,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-04 21:40:23,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1608. [2021-06-04 21:40:23,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.7672682016179215) internal successors, (4447), 1607 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:23,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4447 transitions. [2021-06-04 21:40:23,738 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4447 transitions. Word has length 50 [2021-06-04 21:40:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:23,739 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4447 transitions. [2021-06-04 21:40:23,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4447 transitions. [2021-06-04 21:40:23,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:40:23,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:23,741 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:23,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:23,964 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:23,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1102489, now seen corresponding path program 5 times [2021-06-04 21:40:23,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:23,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657875402] [2021-06-04 21:40:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:24,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:24,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657875402] [2021-06-04 21:40:24,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657875402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:24,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566236864] [2021-06-04 21:40:24,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:24,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-04 21:40:24,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:24,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:40:24,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:24,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566236864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:24,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:24,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-04 21:40:24,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482664263] [2021-06-04 21:40:24,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:40:24,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:40:24,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:40:24,273 INFO L87 Difference]: Start difference. First operand 1608 states and 4447 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:24,586 INFO L93 Difference]: Finished difference Result 2285 states and 6121 transitions. [2021-06-04 21:40:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:40:24,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-04 21:40:24,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:24,589 INFO L225 Difference]: With dead ends: 2285 [2021-06-04 21:40:24,589 INFO L226 Difference]: Without dead ends: 1706 [2021-06-04 21:40:24,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:40:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-06-04 21:40:24,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1313. [2021-06-04 21:40:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 2.7271341463414633) internal successors, (3578), 1312 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3578 transitions. [2021-06-04 21:40:24,617 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3578 transitions. Word has length 50 [2021-06-04 21:40:24,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:24,617 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 3578 transitions. [2021-06-04 21:40:24,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:24,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3578 transitions. [2021-06-04 21:40:24,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:40:24,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:24,620 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:24,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-04 21:40:24,844 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:24,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:24,844 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 6 times [2021-06-04 21:40:24,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:24,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558470878] [2021-06-04 21:40:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:24,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:24,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558470878] [2021-06-04 21:40:24,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558470878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:24,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757769019] [2021-06-04 21:40:24,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:25,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-04 21:40:25,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:25,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:40:25,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:25,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757769019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:25,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:25,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-04 21:40:25,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504935142] [2021-06-04 21:40:25,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-04 21:40:25,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:25,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-04 21:40:25,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:40:25,166 INFO L87 Difference]: Start difference. First operand 1313 states and 3578 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:25,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:25,382 INFO L93 Difference]: Finished difference Result 1931 states and 5017 transitions. [2021-06-04 21:40:25,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:40:25,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:40:25,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:25,384 INFO L225 Difference]: With dead ends: 1931 [2021-06-04 21:40:25,384 INFO L226 Difference]: Without dead ends: 1661 [2021-06-04 21:40:25,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 197.1ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:40:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-04 21:40:25,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1388. [2021-06-04 21:40:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.741888968997837) internal successors, (3803), 1387 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3803 transitions. [2021-06-04 21:40:25,439 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3803 transitions. Word has length 55 [2021-06-04 21:40:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:25,439 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3803 transitions. [2021-06-04 21:40:25,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3803 transitions. [2021-06-04 21:40:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:40:25,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:25,441 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:25,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-04 21:40:25,654 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:25,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:25,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 7 times [2021-06-04 21:40:25,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:25,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561270603] [2021-06-04 21:40:25,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:25,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:25,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561270603] [2021-06-04 21:40:25,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561270603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:25,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127185424] [2021-06-04 21:40:25,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:25,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:40:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:26,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127185424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:26,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:26,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-04 21:40:26,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537728123] [2021-06-04 21:40:26,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:40:26,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:26,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:40:26,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:26,047 INFO L87 Difference]: Start difference. First operand 1388 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:26,371 INFO L93 Difference]: Finished difference Result 2111 states and 5497 transitions. [2021-06-04 21:40:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:40:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:40:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:26,375 INFO L225 Difference]: With dead ends: 2111 [2021-06-04 21:40:26,375 INFO L226 Difference]: Without dead ends: 1841 [2021-06-04 21:40:26,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:40:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-06-04 21:40:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1463. [2021-06-04 21:40:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.7688098495212037) internal successors, (4048), 1462 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4048 transitions. [2021-06-04 21:40:26,411 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4048 transitions. Word has length 55 [2021-06-04 21:40:26,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:26,412 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4048 transitions. [2021-06-04 21:40:26,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4048 transitions. [2021-06-04 21:40:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:40:26,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:26,414 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:26,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-04 21:40:26,629 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 8 times [2021-06-04 21:40:26,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:26,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712207721] [2021-06-04 21:40:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:26,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:26,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712207721] [2021-06-04 21:40:26,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712207721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:26,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134225599] [2021-06-04 21:40:26,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:26,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:26,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:26,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:40:26,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:26,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134225599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:26,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:26,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-04 21:40:26,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784484422] [2021-06-04 21:40:26,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-04 21:40:26,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:26,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-04 21:40:26,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:40:26,945 INFO L87 Difference]: Start difference. First operand 1463 states and 4048 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:27,255 INFO L93 Difference]: Finished difference Result 2858 states and 7631 transitions. [2021-06-04 21:40:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:40:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:40:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:27,264 INFO L225 Difference]: With dead ends: 2858 [2021-06-04 21:40:27,264 INFO L226 Difference]: Without dead ends: 2588 [2021-06-04 21:40:27,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:40:27,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-04 21:40:27,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1643. [2021-06-04 21:40:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.805724725943971) internal successors, (4607), 1642 states have internal predecessors, (4607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4607 transitions. [2021-06-04 21:40:27,307 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4607 transitions. Word has length 55 [2021-06-04 21:40:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:27,307 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4607 transitions. [2021-06-04 21:40:27,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4607 transitions. [2021-06-04 21:40:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:40:27,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:27,309 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:27,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-04 21:40:27,525 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:27,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:27,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 9 times [2021-06-04 21:40:27,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:27,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601229331] [2021-06-04 21:40:27,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:27,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:27,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601229331] [2021-06-04 21:40:27,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601229331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:27,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772961772] [2021-06-04 21:40:27,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:27,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:40:27,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:27,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:40:27,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:27,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772961772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:27,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:27,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-04 21:40:27,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829422558] [2021-06-04 21:40:27,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-04 21:40:27,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:27,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-04 21:40:27,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:40:27,833 INFO L87 Difference]: Start difference. First operand 1643 states and 4607 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:28,199 INFO L93 Difference]: Finished difference Result 2320 states and 6281 transitions. [2021-06-04 21:40:28,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:40:28,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:40:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:28,203 INFO L225 Difference]: With dead ends: 2320 [2021-06-04 21:40:28,203 INFO L226 Difference]: Without dead ends: 1831 [2021-06-04 21:40:28,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:40:28,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-06-04 21:40:28,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1234. [2021-06-04 21:40:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.72992700729927) internal successors, (3366), 1233 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3366 transitions. [2021-06-04 21:40:28,228 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3366 transitions. Word has length 55 [2021-06-04 21:40:28,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:28,229 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 3366 transitions. [2021-06-04 21:40:28,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3366 transitions. [2021-06-04 21:40:28,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:40:28,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:28,230 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:28,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-04 21:40:28,453 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:28,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:28,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1642632502, now seen corresponding path program 10 times [2021-06-04 21:40:28,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:28,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060687663] [2021-06-04 21:40:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:28,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:28,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060687663] [2021-06-04 21:40:28,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060687663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:28,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682587507] [2021-06-04 21:40:28,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:28,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:28,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:28,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:28,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:28,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682587507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:28,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:28,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-04 21:40:28,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76536835] [2021-06-04 21:40:28,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:28,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:28,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:28,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:28,901 INFO L87 Difference]: Start difference. First operand 1234 states and 3366 transitions. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:29,229 INFO L93 Difference]: Finished difference Result 2024 states and 5266 transitions. [2021-06-04 21:40:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:40:29,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:40:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:29,232 INFO L225 Difference]: With dead ends: 2024 [2021-06-04 21:40:29,232 INFO L226 Difference]: Without dead ends: 1690 [2021-06-04 21:40:29,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:40:29,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-06-04 21:40:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1319. [2021-06-04 21:40:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 2.6828528072837634) internal successors, (3536), 1318 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 3536 transitions. [2021-06-04 21:40:29,262 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 3536 transitions. Word has length 60 [2021-06-04 21:40:29,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:29,262 INFO L482 AbstractCegarLoop]: Abstraction has 1319 states and 3536 transitions. [2021-06-04 21:40:29,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:29,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 3536 transitions. [2021-06-04 21:40:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:40:29,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:29,264 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:29,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:29,473 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1005400838, now seen corresponding path program 11 times [2021-06-04 21:40:29,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:29,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438023136] [2021-06-04 21:40:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:29,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:29,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438023136] [2021-06-04 21:40:29,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438023136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:29,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8057970] [2021-06-04 21:40:29,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:29,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-04 21:40:29,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:29,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:40:29,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:29,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8057970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:29,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:29,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-04 21:40:29,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415164421] [2021-06-04 21:40:29,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:40:29,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:29,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:40:29,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:29,854 INFO L87 Difference]: Start difference. First operand 1319 states and 3536 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:30,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:30,077 INFO L93 Difference]: Finished difference Result 2246 states and 5647 transitions. [2021-06-04 21:40:30,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-04 21:40:30,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:40:30,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:30,081 INFO L225 Difference]: With dead ends: 2246 [2021-06-04 21:40:30,081 INFO L226 Difference]: Without dead ends: 1976 [2021-06-04 21:40:30,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:40:30,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-06-04 21:40:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1463. [2021-06-04 21:40:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.7038303693570453) internal successors, (3953), 1462 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 3953 transitions. [2021-06-04 21:40:30,106 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 3953 transitions. Word has length 60 [2021-06-04 21:40:30,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:30,107 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 3953 transitions. [2021-06-04 21:40:30,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:30,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 3953 transitions. [2021-06-04 21:40:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:40:30,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:30,109 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:30,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:30,325 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:30,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1024918474, now seen corresponding path program 12 times [2021-06-04 21:40:30,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:30,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114356997] [2021-06-04 21:40:30,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:30,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:30,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114356997] [2021-06-04 21:40:30,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114356997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:30,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658618661] [2021-06-04 21:40:30,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:30,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:40:30,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:30,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:40:30,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:30,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658618661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:30,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:30,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-04 21:40:30,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193568155] [2021-06-04 21:40:30,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:40:30,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:30,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:40:30,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:30,767 INFO L87 Difference]: Start difference. First operand 1463 states and 3953 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:31,080 INFO L93 Difference]: Finished difference Result 2206 states and 5642 transitions. [2021-06-04 21:40:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:40:31,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:40:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:31,084 INFO L225 Difference]: With dead ends: 2206 [2021-06-04 21:40:31,084 INFO L226 Difference]: Without dead ends: 1936 [2021-06-04 21:40:31,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:40:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-06-04 21:40:31,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1538. [2021-06-04 21:40:31,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.718282368249837) internal successors, (4178), 1537 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 4178 transitions. [2021-06-04 21:40:31,110 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 4178 transitions. Word has length 60 [2021-06-04 21:40:31,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:31,110 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 4178 transitions. [2021-06-04 21:40:31,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 4178 transitions. [2021-06-04 21:40:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:40:31,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:31,112 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:31,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-04 21:40:31,335 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:31,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:31,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1639157944, now seen corresponding path program 13 times [2021-06-04 21:40:31,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:31,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315986140] [2021-06-04 21:40:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:31,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:31,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315986140] [2021-06-04 21:40:31,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315986140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:31,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53256187] [2021-06-04 21:40:31,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:31,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:40:31,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:31,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53256187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:31,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:31,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-04 21:40:31,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387043403] [2021-06-04 21:40:31,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:40:31,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:31,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:40:31,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:31,682 INFO L87 Difference]: Start difference. First operand 1538 states and 4178 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:31,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:31,954 INFO L93 Difference]: Finished difference Result 2256 states and 5817 transitions. [2021-06-04 21:40:31,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:40:31,954 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:40:31,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:31,957 INFO L225 Difference]: With dead ends: 2256 [2021-06-04 21:40:31,957 INFO L226 Difference]: Without dead ends: 1986 [2021-06-04 21:40:31,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:40:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-06-04 21:40:31,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1613. [2021-06-04 21:40:31,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.7313895781637716) internal successors, (4403), 1612 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4403 transitions. [2021-06-04 21:40:31,987 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4403 transitions. Word has length 60 [2021-06-04 21:40:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:31,987 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4403 transitions. [2021-06-04 21:40:31,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4403 transitions. [2021-06-04 21:40:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:40:31,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:31,990 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:32,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:32,205 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:32,205 INFO L82 PathProgramCache]: Analyzing trace with hash -76084344, now seen corresponding path program 14 times [2021-06-04 21:40:32,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:32,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437877295] [2021-06-04 21:40:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:32,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:32,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437877295] [2021-06-04 21:40:32,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437877295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:32,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128599593] [2021-06-04 21:40:32,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:32,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:32,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:40:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:32,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128599593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:32,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:32,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-04 21:40:32,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341723202] [2021-06-04 21:40:32,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:40:32,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:32,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:40:32,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:32,580 INFO L87 Difference]: Start difference. First operand 1613 states and 4403 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:32,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:32,957 INFO L93 Difference]: Finished difference Result 2341 states and 6107 transitions. [2021-06-04 21:40:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:40:32,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:40:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:32,960 INFO L225 Difference]: With dead ends: 2341 [2021-06-04 21:40:32,960 INFO L226 Difference]: Without dead ends: 2071 [2021-06-04 21:40:32,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:40:32,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-04 21:40:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1688. [2021-06-04 21:40:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 2.7551867219917012) internal successors, (4648), 1687 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 4648 transitions. [2021-06-04 21:40:33,019 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 4648 transitions. Word has length 60 [2021-06-04 21:40:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:33,019 INFO L482 AbstractCegarLoop]: Abstraction has 1688 states and 4648 transitions. [2021-06-04 21:40:33,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 4648 transitions. [2021-06-04 21:40:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:40:33,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:33,022 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:33,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-04 21:40:33,237 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:33,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:33,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1108731946, now seen corresponding path program 15 times [2021-06-04 21:40:33,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:33,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941272588] [2021-06-04 21:40:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:33,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:33,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941272588] [2021-06-04 21:40:33,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941272588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:33,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105823814] [2021-06-04 21:40:33,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:33,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-04 21:40:33,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:33,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:40:33,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:33,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105823814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:33,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:33,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-04 21:40:33,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643748807] [2021-06-04 21:40:33,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:40:33,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:33,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:40:33,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:33,551 INFO L87 Difference]: Start difference. First operand 1688 states and 4648 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:33,845 INFO L93 Difference]: Finished difference Result 3108 states and 8281 transitions. [2021-06-04 21:40:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:40:33,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:40:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:33,849 INFO L225 Difference]: With dead ends: 3108 [2021-06-04 21:40:33,849 INFO L226 Difference]: Without dead ends: 2838 [2021-06-04 21:40:33,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:40:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-06-04 21:40:33,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 1868. [2021-06-04 21:40:33,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 2.78896625602571) internal successors, (5207), 1867 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 5207 transitions. [2021-06-04 21:40:33,882 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 5207 transitions. Word has length 60 [2021-06-04 21:40:33,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:33,882 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 5207 transitions. [2021-06-04 21:40:33,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 5207 transitions. [2021-06-04 21:40:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:40:33,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:33,884 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:34,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-04 21:40:34,101 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1086388696, now seen corresponding path program 16 times [2021-06-04 21:40:34,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:34,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660083828] [2021-06-04 21:40:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:34,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:34,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660083828] [2021-06-04 21:40:34,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660083828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:34,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927604975] [2021-06-04 21:40:34,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:34,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:34,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:34,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:40:34,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:34,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927604975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:34,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:34,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-04 21:40:34,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839255079] [2021-06-04 21:40:34,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:40:34,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:34,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:40:34,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:34,411 INFO L87 Difference]: Start difference. First operand 1868 states and 5207 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:34,823 INFO L93 Difference]: Finished difference Result 2595 states and 6981 transitions. [2021-06-04 21:40:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:40:34,824 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:40:34,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:34,826 INFO L225 Difference]: With dead ends: 2595 [2021-06-04 21:40:34,826 INFO L226 Difference]: Without dead ends: 2106 [2021-06-04 21:40:34,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:40:34,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-04 21:40:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1513. [2021-06-04 21:40:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 2.7301587301587302) internal successors, (4128), 1512 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 4128 transitions. [2021-06-04 21:40:34,848 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 4128 transitions. Word has length 60 [2021-06-04 21:40:34,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:34,848 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 4128 transitions. [2021-06-04 21:40:34,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:34,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 4128 transitions. [2021-06-04 21:40:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:34,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:34,851 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:35,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-04 21:40:35,065 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:35,065 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 17 times [2021-06-04 21:40:35,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:35,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779621837] [2021-06-04 21:40:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:35,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:35,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779621837] [2021-06-04 21:40:35,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779621837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:35,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160488524] [2021-06-04 21:40:35,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:35,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-04 21:40:35,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:35,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:35,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:35,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160488524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:35,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:35,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:40:35,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974494733] [2021-06-04 21:40:35,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:40:35,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:35,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:40:35,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:35,477 INFO L87 Difference]: Start difference. First operand 1513 states and 4128 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:35,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:35,765 INFO L93 Difference]: Finished difference Result 2231 states and 5767 transitions. [2021-06-04 21:40:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:40:35,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:35,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:35,767 INFO L225 Difference]: With dead ends: 2231 [2021-06-04 21:40:35,767 INFO L226 Difference]: Without dead ends: 1961 [2021-06-04 21:40:35,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:40:35,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-04 21:40:35,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1588. [2021-06-04 21:40:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 2.742911153119093) internal successors, (4353), 1587 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 4353 transitions. [2021-06-04 21:40:35,797 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 4353 transitions. Word has length 65 [2021-06-04 21:40:35,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:35,797 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 4353 transitions. [2021-06-04 21:40:35,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:35,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 4353 transitions. [2021-06-04 21:40:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:35,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:35,799 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:36,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-04 21:40:36,000 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:36,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 18 times [2021-06-04 21:40:36,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:36,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38368225] [2021-06-04 21:40:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:36,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:36,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38368225] [2021-06-04 21:40:36,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38368225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:36,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655506462] [2021-06-04 21:40:36,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:36,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:40:36,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:36,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:36,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:36,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655506462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:36,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:36,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-04 21:40:36,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121191525] [2021-06-04 21:40:36,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:36,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:36,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:36,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:36,423 INFO L87 Difference]: Start difference. First operand 1588 states and 4353 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:36,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:36,777 INFO L93 Difference]: Finished difference Result 2401 states and 6182 transitions. [2021-06-04 21:40:36,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:40:36,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:36,780 INFO L225 Difference]: With dead ends: 2401 [2021-06-04 21:40:36,780 INFO L226 Difference]: Without dead ends: 2131 [2021-06-04 21:40:36,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:40:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-06-04 21:40:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1663. [2021-06-04 21:40:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 2.7545126353790614) internal successors, (4578), 1662 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 4578 transitions. [2021-06-04 21:40:36,806 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 4578 transitions. Word has length 65 [2021-06-04 21:40:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:36,806 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 4578 transitions. [2021-06-04 21:40:36,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:36,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 4578 transitions. [2021-06-04 21:40:36,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:36,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:36,808 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:37,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-04 21:40:37,032 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:37,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:37,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 19 times [2021-06-04 21:40:37,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:37,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556628337] [2021-06-04 21:40:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:37,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:37,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556628337] [2021-06-04 21:40:37,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556628337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:37,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244924396] [2021-06-04 21:40:37,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:37,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:37,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:37,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244924396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:37,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:37,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:40:37,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089717549] [2021-06-04 21:40:37,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:40:37,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:37,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:40:37,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:37,393 INFO L87 Difference]: Start difference. First operand 1663 states and 4578 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:37,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:37,691 INFO L93 Difference]: Finished difference Result 2431 states and 6317 transitions. [2021-06-04 21:40:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:40:37,705 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:37,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:37,708 INFO L225 Difference]: With dead ends: 2431 [2021-06-04 21:40:37,708 INFO L226 Difference]: Without dead ends: 2161 [2021-06-04 21:40:37,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:40:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-06-04 21:40:37,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1738. [2021-06-04 21:40:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.765112262521589) internal successors, (4803), 1737 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 4803 transitions. [2021-06-04 21:40:37,735 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 4803 transitions. Word has length 65 [2021-06-04 21:40:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:37,735 INFO L482 AbstractCegarLoop]: Abstraction has 1738 states and 4803 transitions. [2021-06-04 21:40:37,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 4803 transitions. [2021-06-04 21:40:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:37,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:37,737 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:37,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:37,959 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:37,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:37,960 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 20 times [2021-06-04 21:40:37,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:37,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768182142] [2021-06-04 21:40:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:38,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:38,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768182142] [2021-06-04 21:40:38,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768182142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:38,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355317172] [2021-06-04 21:40:38,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:38,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:38,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:38,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:38,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:38,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355317172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:38,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:38,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-04 21:40:38,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777944521] [2021-06-04 21:40:38,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:38,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:38,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:38,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:38,412 INFO L87 Difference]: Start difference. First operand 1738 states and 4803 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:38,846 INFO L93 Difference]: Finished difference Result 2516 states and 6607 transitions. [2021-06-04 21:40:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:40:38,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:38,848 INFO L225 Difference]: With dead ends: 2516 [2021-06-04 21:40:38,849 INFO L226 Difference]: Without dead ends: 2246 [2021-06-04 21:40:38,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 409.0ms TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:40:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-04 21:40:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1813. [2021-06-04 21:40:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.7858719646799117) internal successors, (5048), 1812 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5048 transitions. [2021-06-04 21:40:38,876 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5048 transitions. Word has length 65 [2021-06-04 21:40:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:38,876 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 5048 transitions. [2021-06-04 21:40:38,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5048 transitions. [2021-06-04 21:40:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:38,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:38,878 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:39,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-04 21:40:39,093 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:39,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:39,093 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 21 times [2021-06-04 21:40:39,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:39,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204695073] [2021-06-04 21:40:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:39,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:39,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204695073] [2021-06-04 21:40:39,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204695073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:39,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504643186] [2021-06-04 21:40:39,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:39,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-04 21:40:39,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:39,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:39,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:39,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504643186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:39,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:39,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:40:39,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182331526] [2021-06-04 21:40:39,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:40:39,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:39,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:40:39,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:39,459 INFO L87 Difference]: Start difference. First operand 1813 states and 5048 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:39,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:39,804 INFO L93 Difference]: Finished difference Result 3258 states and 8731 transitions. [2021-06-04 21:40:39,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:40:39,805 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:39,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:39,807 INFO L225 Difference]: With dead ends: 3258 [2021-06-04 21:40:39,807 INFO L226 Difference]: Without dead ends: 2988 [2021-06-04 21:40:39,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:40:39,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-06-04 21:40:39,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1993. [2021-06-04 21:40:39,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 2.8147590361445785) internal successors, (5607), 1992 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 5607 transitions. [2021-06-04 21:40:39,834 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 5607 transitions. Word has length 65 [2021-06-04 21:40:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:39,834 INFO L482 AbstractCegarLoop]: Abstraction has 1993 states and 5607 transitions. [2021-06-04 21:40:39,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 5607 transitions. [2021-06-04 21:40:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:39,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:39,837 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:40,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:40,053 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:40,053 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 22 times [2021-06-04 21:40:40,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:40,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501002651] [2021-06-04 21:40:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:40,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:40,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501002651] [2021-06-04 21:40:40,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501002651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:40,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608460570] [2021-06-04 21:40:40,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:40,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:40,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:40,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:40,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:40,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608460570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:40,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:40,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:40:40,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082779328] [2021-06-04 21:40:40,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:40:40,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:40,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:40:40,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:40,398 INFO L87 Difference]: Start difference. First operand 1993 states and 5607 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:40,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:40,836 INFO L93 Difference]: Finished difference Result 2720 states and 7381 transitions. [2021-06-04 21:40:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:40:40,836 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:40,838 INFO L225 Difference]: With dead ends: 2720 [2021-06-04 21:40:40,838 INFO L226 Difference]: Without dead ends: 2231 [2021-06-04 21:40:40,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:40:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-06-04 21:40:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1434. [2021-06-04 21:40:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 2.732728541521284) internal successors, (3916), 1433 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 3916 transitions. [2021-06-04 21:40:40,862 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 3916 transitions. Word has length 65 [2021-06-04 21:40:40,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:40,862 INFO L482 AbstractCegarLoop]: Abstraction has 1434 states and 3916 transitions. [2021-06-04 21:40:40,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:40,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 3916 transitions. [2021-06-04 21:40:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:40,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:40,864 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:41,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-04 21:40:41,077 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:41,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2053970119, now seen corresponding path program 23 times [2021-06-04 21:40:41,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:41,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383219560] [2021-06-04 21:40:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:41,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:41,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383219560] [2021-06-04 21:40:41,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383219560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:41,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241318566] [2021-06-04 21:40:41,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:41,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-04 21:40:41,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:41,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:41,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:41,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241318566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:41,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:41,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-04 21:40:41,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284234543] [2021-06-04 21:40:41,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:40:41,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:41,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:40:41,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:40:41,553 INFO L87 Difference]: Start difference. First operand 1434 states and 3916 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:41,884 INFO L93 Difference]: Finished difference Result 2274 states and 5916 transitions. [2021-06-04 21:40:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:40:41,884 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:41,886 INFO L225 Difference]: With dead ends: 2274 [2021-06-04 21:40:41,886 INFO L226 Difference]: Without dead ends: 1940 [2021-06-04 21:40:41,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 368.4ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:40:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-06-04 21:40:41,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1519. [2021-06-04 21:40:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.691699604743083) internal successors, (4086), 1518 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4086 transitions. [2021-06-04 21:40:41,902 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4086 transitions. Word has length 70 [2021-06-04 21:40:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:41,902 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4086 transitions. [2021-06-04 21:40:41,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4086 transitions. [2021-06-04 21:40:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:41,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:41,904 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:42,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:42,104 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:42,105 INFO L82 PathProgramCache]: Analyzing trace with hash -778605685, now seen corresponding path program 24 times [2021-06-04 21:40:42,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:42,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934972116] [2021-06-04 21:40:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:42,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:42,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934972116] [2021-06-04 21:40:42,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934972116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:42,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866210078] [2021-06-04 21:40:42,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:42,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-04 21:40:42,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:42,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:42,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:42,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866210078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:42,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:42,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:40:42,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770762968] [2021-06-04 21:40:42,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:42,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:42,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:42,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:42,512 INFO L87 Difference]: Start difference. First operand 1519 states and 4086 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:42,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:42,747 INFO L93 Difference]: Finished difference Result 2596 states and 6497 transitions. [2021-06-04 21:40:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:40:42,747 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:42,750 INFO L225 Difference]: With dead ends: 2596 [2021-06-04 21:40:42,750 INFO L226 Difference]: Without dead ends: 2326 [2021-06-04 21:40:42,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:40:42,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-06-04 21:40:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1663. [2021-06-04 21:40:42,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 2.7093862815884475) internal successors, (4503), 1662 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 4503 transitions. [2021-06-04 21:40:42,775 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 4503 transitions. Word has length 70 [2021-06-04 21:40:42,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:42,775 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 4503 transitions. [2021-06-04 21:40:42,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:42,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 4503 transitions. [2021-06-04 21:40:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:42,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:42,777 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:42,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-04 21:40:42,993 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash 220290651, now seen corresponding path program 25 times [2021-06-04 21:40:42,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:42,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554183435] [2021-06-04 21:40:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:43,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554183435] [2021-06-04 21:40:43,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554183435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798298445] [2021-06-04 21:40:43,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:43,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:43,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:43,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798298445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:43,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:43,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:40:43,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600909054] [2021-06-04 21:40:43,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:43,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:43,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:43,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:43,396 INFO L87 Difference]: Start difference. First operand 1663 states and 4503 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:43,746 INFO L93 Difference]: Finished difference Result 2556 states and 6492 transitions. [2021-06-04 21:40:43,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:40:43,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:43,749 INFO L225 Difference]: With dead ends: 2556 [2021-06-04 21:40:43,749 INFO L226 Difference]: Without dead ends: 2286 [2021-06-04 21:40:43,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 367.8ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:40:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-06-04 21:40:43,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1738. [2021-06-04 21:40:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.7219343696027636) internal successors, (4728), 1737 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 4728 transitions. [2021-06-04 21:40:43,774 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 4728 transitions. Word has length 70 [2021-06-04 21:40:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:43,774 INFO L482 AbstractCegarLoop]: Abstraction has 1738 states and 4728 transitions. [2021-06-04 21:40:43,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 4728 transitions. [2021-06-04 21:40:43,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:43,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:43,776 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:43,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:43,989 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:43,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:43,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1659037239, now seen corresponding path program 26 times [2021-06-04 21:40:43,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:43,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301319551] [2021-06-04 21:40:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:44,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:44,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301319551] [2021-06-04 21:40:44,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301319551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:44,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622447427] [2021-06-04 21:40:44,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:44,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:44,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:44,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:44,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:44,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622447427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:44,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:44,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:40:44,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915685859] [2021-06-04 21:40:44,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:44,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:44,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:44,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:44,337 INFO L87 Difference]: Start difference. First operand 1738 states and 4728 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:44,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:44,609 INFO L93 Difference]: Finished difference Result 2606 states and 6667 transitions. [2021-06-04 21:40:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:40:44,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:44,612 INFO L225 Difference]: With dead ends: 2606 [2021-06-04 21:40:44,612 INFO L226 Difference]: Without dead ends: 2336 [2021-06-04 21:40:44,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 270.5ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:40:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-04 21:40:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1813. [2021-06-04 21:40:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.7334437086092715) internal successors, (4953), 1812 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 4953 transitions. [2021-06-04 21:40:44,631 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 4953 transitions. Word has length 70 [2021-06-04 21:40:44,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:44,631 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 4953 transitions. [2021-06-04 21:40:44,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 4953 transitions. [2021-06-04 21:40:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:44,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:44,633 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:44,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-04 21:40:44,844 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:44,844 INFO L82 PathProgramCache]: Analyzing trace with hash 371282073, now seen corresponding path program 27 times [2021-06-04 21:40:44,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:44,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513444985] [2021-06-04 21:40:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:44,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:44,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513444985] [2021-06-04 21:40:44,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513444985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:44,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891076358] [2021-06-04 21:40:44,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:45,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-04 21:40:45,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:45,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:45,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:45,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891076358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:45,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:45,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:40:45,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886956552] [2021-06-04 21:40:45,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:45,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:45,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:45,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:45,234 INFO L87 Difference]: Start difference. First operand 1813 states and 4953 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:45,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:45,632 INFO L93 Difference]: Finished difference Result 2631 states and 6792 transitions. [2021-06-04 21:40:45,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:40:45,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:45,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:45,635 INFO L225 Difference]: With dead ends: 2631 [2021-06-04 21:40:45,635 INFO L226 Difference]: Without dead ends: 2361 [2021-06-04 21:40:45,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 395.0ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:40:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-04 21:40:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1888. [2021-06-04 21:40:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 2.7440381558028615) internal successors, (5178), 1887 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 5178 transitions. [2021-06-04 21:40:45,658 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 5178 transitions. Word has length 70 [2021-06-04 21:40:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:45,658 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 5178 transitions. [2021-06-04 21:40:45,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 5178 transitions. [2021-06-04 21:40:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:45,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:45,661 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:45,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:45,878 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:45,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:45,879 INFO L82 PathProgramCache]: Analyzing trace with hash 985521543, now seen corresponding path program 28 times [2021-06-04 21:40:45,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:45,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925823578] [2021-06-04 21:40:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:46,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:46,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925823578] [2021-06-04 21:40:46,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925823578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:46,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921826620] [2021-06-04 21:40:46,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:46,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:46,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:46,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:46,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:46,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921826620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:46,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:46,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:40:46,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617440810] [2021-06-04 21:40:46,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:46,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:46,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:46,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:46,261 INFO L87 Difference]: Start difference. First operand 1888 states and 5178 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:46,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:46,628 INFO L93 Difference]: Finished difference Result 2656 states and 6917 transitions. [2021-06-04 21:40:46,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:40:46,629 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:46,631 INFO L225 Difference]: With dead ends: 2656 [2021-06-04 21:40:46,631 INFO L226 Difference]: Without dead ends: 2386 [2021-06-04 21:40:46,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 314.3ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:40:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-06-04 21:40:46,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1963. [2021-06-04 21:40:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 2.753822629969419) internal successors, (5403), 1962 states have internal predecessors, (5403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:46,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5403 transitions. [2021-06-04 21:40:46,659 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5403 transitions. Word has length 70 [2021-06-04 21:40:46,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:46,659 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5403 transitions. [2021-06-04 21:40:46,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:46,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5403 transitions. [2021-06-04 21:40:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:46,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:46,661 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:46,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-04 21:40:46,862 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:46,862 INFO L82 PathProgramCache]: Analyzing trace with hash -729720745, now seen corresponding path program 29 times [2021-06-04 21:40:46,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:46,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030134581] [2021-06-04 21:40:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:46,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:46,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030134581] [2021-06-04 21:40:46,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030134581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:46,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687174537] [2021-06-04 21:40:46,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:47,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-04 21:40:47,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:47,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:47,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:47,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687174537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:47,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:47,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:40:47,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564473743] [2021-06-04 21:40:47,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:47,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:47,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:47,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:47,242 INFO L87 Difference]: Start difference. First operand 1963 states and 5403 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:47,708 INFO L93 Difference]: Finished difference Result 2741 states and 7207 transitions. [2021-06-04 21:40:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:40:47,708 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:47,711 INFO L225 Difference]: With dead ends: 2741 [2021-06-04 21:40:47,711 INFO L226 Difference]: Without dead ends: 2471 [2021-06-04 21:40:47,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:40:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-06-04 21:40:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2038. [2021-06-04 21:40:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2037 states have (on average 2.7727049582719685) internal successors, (5648), 2037 states have internal predecessors, (5648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5648 transitions. [2021-06-04 21:40:47,732 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5648 transitions. Word has length 70 [2021-06-04 21:40:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:47,733 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5648 transitions. [2021-06-04 21:40:47,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5648 transitions. [2021-06-04 21:40:47,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:47,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:47,735 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:47,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-04 21:40:47,936 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:47,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1762368347, now seen corresponding path program 30 times [2021-06-04 21:40:47,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:47,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944132765] [2021-06-04 21:40:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:48,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:48,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944132765] [2021-06-04 21:40:48,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944132765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:48,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659697447] [2021-06-04 21:40:48,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:48,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-04 21:40:48,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:48,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:48,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:48,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659697447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:48,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:48,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:40:48,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771175834] [2021-06-04 21:40:48,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:48,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:48,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:48,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:48,304 INFO L87 Difference]: Start difference. First operand 2038 states and 5648 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:48,798 INFO L93 Difference]: Finished difference Result 3508 states and 9381 transitions. [2021-06-04 21:40:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:40:48,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:48,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:48,802 INFO L225 Difference]: With dead ends: 3508 [2021-06-04 21:40:48,802 INFO L226 Difference]: Without dead ends: 3238 [2021-06-04 21:40:48,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:40:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3238 states. [2021-06-04 21:40:48,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3238 to 2218. [2021-06-04 21:40:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 2.7997293640054126) internal successors, (6207), 2217 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:48,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 6207 transitions. [2021-06-04 21:40:48,864 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 6207 transitions. Word has length 70 [2021-06-04 21:40:48,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:48,865 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 6207 transitions. [2021-06-04 21:40:48,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:48,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 6207 transitions. [2021-06-04 21:40:48,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:48,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:48,868 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:49,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-04 21:40:49,091 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:49,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1740025097, now seen corresponding path program 31 times [2021-06-04 21:40:49,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:49,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497712348] [2021-06-04 21:40:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:49,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:49,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497712348] [2021-06-04 21:40:49,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497712348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:49,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633775230] [2021-06-04 21:40:49,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:49,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:49,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:49,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633775230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:49,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:49,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:40:49,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126868484] [2021-06-04 21:40:49,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:49,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:49,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:49,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:49,485 INFO L87 Difference]: Start difference. First operand 2218 states and 6207 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:50,129 INFO L93 Difference]: Finished difference Result 3451 states and 9241 transitions. [2021-06-04 21:40:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:40:50,130 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:50,134 INFO L225 Difference]: With dead ends: 3451 [2021-06-04 21:40:50,134 INFO L226 Difference]: Without dead ends: 2876 [2021-06-04 21:40:50,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 582.6ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:40:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-04 21:40:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2253. [2021-06-04 21:40:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-04 21:40:50,158 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 70 [2021-06-04 21:40:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:50,158 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-04 21:40:50,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-04 21:40:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:50,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:50,161 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:50,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-04 21:40:50,383 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:50,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:50,384 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 32 times [2021-06-04 21:40:50,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:50,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325573096] [2021-06-04 21:40:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:50,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:50,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325573096] [2021-06-04 21:40:50,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325573096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:50,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191916964] [2021-06-04 21:40:50,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:50,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:50,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:50,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:50,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:50,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191916964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:50,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:50,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-04 21:40:50,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852695105] [2021-06-04 21:40:50,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:50,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:50,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:50,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:50,759 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:51,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:51,077 INFO L93 Difference]: Finished difference Result 2996 states and 7897 transitions. [2021-06-04 21:40:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:40:51,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:51,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:51,080 INFO L225 Difference]: With dead ends: 2996 [2021-06-04 21:40:51,080 INFO L226 Difference]: Without dead ends: 2726 [2021-06-04 21:40:51,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:40:51,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-04 21:40:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2253. [2021-06-04 21:40:51,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:51,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-04 21:40:51,101 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-04 21:40:51,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:51,101 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-04 21:40:51,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:51,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-04 21:40:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:51,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:51,103 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:51,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:51,304 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:51,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:51,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 33 times [2021-06-04 21:40:51,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:51,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34384469] [2021-06-04 21:40:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:51,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:51,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34384469] [2021-06-04 21:40:51,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34384469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:51,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897978798] [2021-06-04 21:40:51,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:51,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-04 21:40:51,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:51,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:51,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897978798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:51,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:51,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:40:51,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826927878] [2021-06-04 21:40:51,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:51,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:51,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:51,735 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:52,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:52,097 INFO L93 Difference]: Finished difference Result 3141 states and 8187 transitions. [2021-06-04 21:40:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:40:52,098 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:52,100 INFO L225 Difference]: With dead ends: 3141 [2021-06-04 21:40:52,100 INFO L226 Difference]: Without dead ends: 2871 [2021-06-04 21:40:52,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:40:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-06-04 21:40:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2253. [2021-06-04 21:40:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-04 21:40:52,129 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-04 21:40:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:52,130 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-04 21:40:52,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:52,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-04 21:40:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:52,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:52,132 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:52,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-04 21:40:52,346 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:52,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:52,346 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 34 times [2021-06-04 21:40:52,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:52,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085238121] [2021-06-04 21:40:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:52,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:52,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085238121] [2021-06-04 21:40:52,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085238121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:52,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755713206] [2021-06-04 21:40:52,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:52,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:52,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:52,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:52,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:52,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755713206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:52,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:52,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-04 21:40:52,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394814848] [2021-06-04 21:40:52,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:52,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:52,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:52,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:52,707 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:53,074 INFO L93 Difference]: Finished difference Result 3096 states and 8097 transitions. [2021-06-04 21:40:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:40:53,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:53,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:53,079 INFO L225 Difference]: With dead ends: 3096 [2021-06-04 21:40:53,079 INFO L226 Difference]: Without dead ends: 2826 [2021-06-04 21:40:53,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:40:53,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-04 21:40:53,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2253. [2021-06-04 21:40:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-04 21:40:53,104 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-04 21:40:53,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:53,104 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-04 21:40:53,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-04 21:40:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:53,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:53,107 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:53,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-04 21:40:53,308 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:53,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 35 times [2021-06-04 21:40:53,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:53,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414118703] [2021-06-04 21:40:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:53,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:53,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414118703] [2021-06-04 21:40:53,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414118703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:53,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788902998] [2021-06-04 21:40:53,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:53,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-04 21:40:53,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:53,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:53,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:53,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788902998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:53,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:53,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:40:53,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497978030] [2021-06-04 21:40:53,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:53,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:53,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:53,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:53,675 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:54,122 INFO L93 Difference]: Finished difference Result 3046 states and 7997 transitions. [2021-06-04 21:40:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:40:54,123 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:54,138 INFO L225 Difference]: With dead ends: 3046 [2021-06-04 21:40:54,139 INFO L226 Difference]: Without dead ends: 2776 [2021-06-04 21:40:54,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 419.7ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:40:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-04 21:40:54,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2253. [2021-06-04 21:40:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-04 21:40:54,175 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-04 21:40:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:54,175 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-04 21:40:54,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-04 21:40:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:54,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:54,179 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:54,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:54,397 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:54,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:54,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 36 times [2021-06-04 21:40:54,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:54,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510275206] [2021-06-04 21:40:54,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:54,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:54,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510275206] [2021-06-04 21:40:54,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510275206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:54,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405870778] [2021-06-04 21:40:54,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:54,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-04 21:40:54,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:54,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:54,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:54,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405870778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:54,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:54,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-04 21:40:54,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868593806] [2021-06-04 21:40:54,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:54,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:54,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:54,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:54,826 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:55,286 INFO L93 Difference]: Finished difference Result 2996 states and 7897 transitions. [2021-06-04 21:40:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:40:55,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:55,289 INFO L225 Difference]: With dead ends: 2996 [2021-06-04 21:40:55,290 INFO L226 Difference]: Without dead ends: 2726 [2021-06-04 21:40:55,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 419.0ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:40:55,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-04 21:40:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2253. [2021-06-04 21:40:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-04 21:40:55,319 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-04 21:40:55,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:55,319 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-04 21:40:55,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:55,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-04 21:40:55,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:55,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:55,322 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:55,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-04 21:40:55,537 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:55,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:55,537 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 37 times [2021-06-04 21:40:55,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:55,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152219097] [2021-06-04 21:40:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:55,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:55,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152219097] [2021-06-04 21:40:55,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152219097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:55,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966337167] [2021-06-04 21:40:55,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:55,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:55,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:55,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966337167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:55,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:55,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:40:55,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60005] [2021-06-04 21:40:55,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:55,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:55,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:55,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:55,932 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:56,438 INFO L93 Difference]: Finished difference Result 3006 states and 7947 transitions. [2021-06-04 21:40:56,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:40:56,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:56,442 INFO L225 Difference]: With dead ends: 3006 [2021-06-04 21:40:56,442 INFO L226 Difference]: Without dead ends: 2736 [2021-06-04 21:40:56,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 480.9ms TimeCoverageRelationStatistics Valid=301, Invalid=889, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:40:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-06-04 21:40:56,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2253. [2021-06-04 21:40:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-04 21:40:56,462 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-04 21:40:56,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:56,462 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-04 21:40:56,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-04 21:40:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:56,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:56,465 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:56,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:56,665 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:56,666 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 38 times [2021-06-04 21:40:56,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:56,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200127569] [2021-06-04 21:40:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:56,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:56,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200127569] [2021-06-04 21:40:56,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200127569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:56,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520995191] [2021-06-04 21:40:56,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:56,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:56,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:56,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:56,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:56,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520995191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:56,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:56,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-04 21:40:56,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778484738] [2021-06-04 21:40:56,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:56,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:56,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:56,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:56,992 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:57,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:57,432 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-04 21:40:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:40:57,433 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:57,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:57,437 INFO L225 Difference]: With dead ends: 3748 [2021-06-04 21:40:57,437 INFO L226 Difference]: Without dead ends: 3478 [2021-06-04 21:40:57,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 380.4ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:40:57,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-04 21:40:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-04 21:40:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-04 21:40:57,471 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-04 21:40:57,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:57,472 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-04 21:40:57,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:57,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-04 21:40:57,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:57,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:57,474 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:57,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-04 21:40:57,677 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:57,677 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 39 times [2021-06-04 21:40:57,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:57,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916390897] [2021-06-04 21:40:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:57,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:57,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916390897] [2021-06-04 21:40:57,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916390897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:57,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448506371] [2021-06-04 21:40:57,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:57,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-04 21:40:57,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:57,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:57,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:58,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448506371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:58,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:58,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:40:58,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975229271] [2021-06-04 21:40:58,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:58,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:58,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:58,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:58,082 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:58,657 INFO L93 Difference]: Finished difference Result 3210 states and 8721 transitions. [2021-06-04 21:40:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:40:58,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:58,660 INFO L225 Difference]: With dead ends: 3210 [2021-06-04 21:40:58,660 INFO L226 Difference]: Without dead ends: 2721 [2021-06-04 21:40:58,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 533.7ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:40:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-04 21:40:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2378. [2021-06-04 21:40:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.8115271350441735) internal successors, (6683), 2377 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-06-04 21:40:58,682 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-06-04 21:40:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:58,682 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-06-04 21:40:58,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-06-04 21:40:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:40:58,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:58,684 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:58,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:58,885 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:58,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:58,885 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-06-04 21:40:58,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:58,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049498718] [2021-06-04 21:40:58,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:59,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:59,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049498718] [2021-06-04 21:40:59,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049498718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:59,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069027154] [2021-06-04 21:40:59,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:59,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:59,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:59,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:40:59,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:59,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069027154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:59,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:59,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-06-04 21:40:59,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588649262] [2021-06-04 21:40:59,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:40:59,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:59,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:40:59,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:40:59,362 INFO L87 Difference]: Start difference. First operand 2378 states and 6683 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:59,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:59,736 INFO L93 Difference]: Finished difference Result 3268 states and 8783 transitions. [2021-06-04 21:40:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:40:59,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:40:59,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:59,740 INFO L225 Difference]: With dead ends: 3268 [2021-06-04 21:40:59,740 INFO L226 Difference]: Without dead ends: 2934 [2021-06-04 21:40:59,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 432.2ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:40:59,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-06-04 21:40:59,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2463. [2021-06-04 21:40:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.7835093419983754) internal successors, (6853), 2462 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6853 transitions. [2021-06-04 21:40:59,766 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6853 transitions. Word has length 80 [2021-06-04 21:40:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:59,766 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6853 transitions. [2021-06-04 21:40:59,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:59,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6853 transitions. [2021-06-04 21:40:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:40:59,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:59,769 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:59,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-04 21:40:59,969 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:59,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:59,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-06-04 21:40:59,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:59,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697189534] [2021-06-04 21:40:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:00,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:00,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697189534] [2021-06-04 21:41:00,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697189534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:00,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189873905] [2021-06-04 21:41:00,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:00,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:41:00,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:00,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:00,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:00,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189873905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:00,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:00,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:41:00,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811777751] [2021-06-04 21:41:00,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:00,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:00,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:00,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:00,435 INFO L87 Difference]: Start difference. First operand 2463 states and 6853 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:00,704 INFO L93 Difference]: Finished difference Result 3561 states and 9177 transitions. [2021-06-04 21:41:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:41:00,705 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:00,708 INFO L225 Difference]: With dead ends: 3561 [2021-06-04 21:41:00,708 INFO L226 Difference]: Without dead ends: 3291 [2021-06-04 21:41:00,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:41:00,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-06-04 21:41:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 2478. [2021-06-04 21:41:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:41:00,732 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:41:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:00,732 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:41:00,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:41:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:00,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:00,735 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:00,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-04 21:41:00,935 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:00,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-06-04 21:41:00,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:00,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226081941] [2021-06-04 21:41:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:01,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:01,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226081941] [2021-06-04 21:41:01,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226081941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:01,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402398883] [2021-06-04 21:41:01,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:01,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:41:01,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:01,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:01,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:01,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402398883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:01,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:01,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:41:01,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880970796] [2021-06-04 21:41:01,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:01,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:01,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:01,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:01,417 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:01,814 INFO L93 Difference]: Finished difference Result 3446 states and 8947 transitions. [2021-06-04 21:41:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:41:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:01,818 INFO L225 Difference]: With dead ends: 3446 [2021-06-04 21:41:01,818 INFO L226 Difference]: Without dead ends: 3176 [2021-06-04 21:41:01,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:41:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-04 21:41:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2478. [2021-06-04 21:41:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:41:01,841 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:41:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:01,841 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:41:01,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:41:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:01,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:01,844 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:02,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:02,044 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:02,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:02,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-06-04 21:41:02,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:02,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122643851] [2021-06-04 21:41:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:02,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:02,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122643851] [2021-06-04 21:41:02,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122643851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:02,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39176808] [2021-06-04 21:41:02,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:02,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:02,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:02,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39176808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:02,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:02,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:41:02,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192445299] [2021-06-04 21:41:02,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:02,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:02,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:02,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:02,490 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:02,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:02,816 INFO L93 Difference]: Finished difference Result 3421 states and 8897 transitions. [2021-06-04 21:41:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:41:02,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:02,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:02,820 INFO L225 Difference]: With dead ends: 3421 [2021-06-04 21:41:02,820 INFO L226 Difference]: Without dead ends: 3151 [2021-06-04 21:41:02,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 358.5ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:41:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-04 21:41:02,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2478. [2021-06-04 21:41:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:41:02,842 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:41:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:02,843 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:41:02,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:02,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:41:02,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:02,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:02,845 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:03,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-04 21:41:03,049 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-06-04 21:41:03,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:03,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722948153] [2021-06-04 21:41:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:03,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:03,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722948153] [2021-06-04 21:41:03,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722948153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:03,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988944790] [2021-06-04 21:41:03,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:03,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:03,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:03,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:03,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:03,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988944790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:03,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:03,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:41:03,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590770224] [2021-06-04 21:41:03,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:03,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:03,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:03,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:03,544 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:03,985 INFO L93 Difference]: Finished difference Result 3371 states and 8797 transitions. [2021-06-04 21:41:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:41:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:03,988 INFO L225 Difference]: With dead ends: 3371 [2021-06-04 21:41:03,988 INFO L226 Difference]: Without dead ends: 3101 [2021-06-04 21:41:03,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 471.7ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:41:03,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-06-04 21:41:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2478. [2021-06-04 21:41:04,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:04,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:41:04,010 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:41:04,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:04,010 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:41:04,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:04,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:41:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:04,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:04,012 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:04,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:04,217 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:04,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-06-04 21:41:04,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:04,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523369951] [2021-06-04 21:41:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:04,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:04,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523369951] [2021-06-04 21:41:04,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523369951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:04,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385987033] [2021-06-04 21:41:04,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:04,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-04 21:41:04,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:04,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:04,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:04,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385987033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:04,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:04,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:41:04,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677406687] [2021-06-04 21:41:04,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:04,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:04,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:04,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:04,610 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:04,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:04,983 INFO L93 Difference]: Finished difference Result 3321 states and 8697 transitions. [2021-06-04 21:41:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:41:04,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:04,986 INFO L225 Difference]: With dead ends: 3321 [2021-06-04 21:41:04,986 INFO L226 Difference]: Without dead ends: 3051 [2021-06-04 21:41:04,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 370.2ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:41:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-06-04 21:41:05,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2478. [2021-06-04 21:41:05,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:41:05,008 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:41:05,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:05,009 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:41:05,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:41:05,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:05,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:05,011 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:05,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:05,211 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:05,211 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-06-04 21:41:05,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:05,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963026159] [2021-06-04 21:41:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:05,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:05,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963026159] [2021-06-04 21:41:05,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963026159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:05,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768455438] [2021-06-04 21:41:05,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:05,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:05,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:05,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:05,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:05,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768455438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:05,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:05,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:41:05,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480539523] [2021-06-04 21:41:05,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:05,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:05,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:05,630 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:06,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:06,147 INFO L93 Difference]: Finished difference Result 3271 states and 8597 transitions. [2021-06-04 21:41:06,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:41:06,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:06,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:06,151 INFO L225 Difference]: With dead ends: 3271 [2021-06-04 21:41:06,151 INFO L226 Difference]: Without dead ends: 3001 [2021-06-04 21:41:06,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 527.2ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:41:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-04 21:41:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2478. [2021-06-04 21:41:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:41:06,175 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:41:06,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:06,175 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:41:06,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:06,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:41:06,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:06,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:06,177 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:06,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-04 21:41:06,378 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:06,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:06,378 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-06-04 21:41:06,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:06,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445196053] [2021-06-04 21:41:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:06,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:06,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445196053] [2021-06-04 21:41:06,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445196053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:06,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433078300] [2021-06-04 21:41:06,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:06,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:41:06,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:06,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:06,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:06,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433078300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:06,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:06,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:41:06,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918372736] [2021-06-04 21:41:06,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:06,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:06,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:06,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:06,793 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:07,208 INFO L93 Difference]: Finished difference Result 3221 states and 8497 transitions. [2021-06-04 21:41:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:41:07,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:07,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:07,212 INFO L225 Difference]: With dead ends: 3221 [2021-06-04 21:41:07,212 INFO L226 Difference]: Without dead ends: 2951 [2021-06-04 21:41:07,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:41:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-04 21:41:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2478. [2021-06-04 21:41:07,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:41:07,235 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:41:07,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:07,235 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:41:07,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:07,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:41:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:07,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:07,237 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:07,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:07,437 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:07,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-06-04 21:41:07,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:07,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105157887] [2021-06-04 21:41:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:07,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:07,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105157887] [2021-06-04 21:41:07,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105157887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:07,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622008611] [2021-06-04 21:41:07,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:07,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:41:07,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:07,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:07,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:07,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622008611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:07,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:07,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:41:07,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183615581] [2021-06-04 21:41:07,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:07,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:07,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:07,869 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:08,517 INFO L93 Difference]: Finished difference Result 3679 states and 9763 transitions. [2021-06-04 21:41:08,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:41:08,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:08,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:08,521 INFO L225 Difference]: With dead ends: 3679 [2021-06-04 21:41:08,521 INFO L226 Difference]: Without dead ends: 3056 [2021-06-04 21:41:08,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 614.9ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:41:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-06-04 21:41:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2388. [2021-06-04 21:41:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.785085881860075) internal successors, (6648), 2387 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-06-04 21:41:08,547 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-06-04 21:41:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:08,547 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-06-04 21:41:08,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-06-04 21:41:08,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:08,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:08,549 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:08,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-04 21:41:08,749 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:08,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:08,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-06-04 21:41:08,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:08,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809826996] [2021-06-04 21:41:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:08,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:08,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809826996] [2021-06-04 21:41:08,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809826996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:08,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295715614] [2021-06-04 21:41:08,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:08,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:08,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:09,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295715614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:09,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:09,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:41:09,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286214182] [2021-06-04 21:41:09,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:09,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:09,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:09,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:09,124 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:09,597 INFO L93 Difference]: Finished difference Result 3908 states and 10481 transitions. [2021-06-04 21:41:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:41:09,597 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:09,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:09,602 INFO L225 Difference]: With dead ends: 3908 [2021-06-04 21:41:09,602 INFO L226 Difference]: Without dead ends: 3638 [2021-06-04 21:41:09,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 449.9ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:41:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-06-04 21:41:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-06-04 21:41:09,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.8075574600701207) internal successors, (7207), 2567 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-06-04 21:41:09,638 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-06-04 21:41:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:09,638 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-06-04 21:41:09,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:09,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-06-04 21:41:09,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:09,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:09,640 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:09,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-04 21:41:09,845 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:09,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-06-04 21:41:09,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:09,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076086791] [2021-06-04 21:41:09,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:09,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:09,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076086791] [2021-06-04 21:41:09,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076086791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:09,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997241552] [2021-06-04 21:41:09,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:10,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:10,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:10,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:10,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:10,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997241552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:10,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:10,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:41:10,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842391380] [2021-06-04 21:41:10,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:10,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:10,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:10,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:10,247 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:10,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:10,939 INFO L93 Difference]: Finished difference Result 3851 states and 10341 transitions. [2021-06-04 21:41:10,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:41:10,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:10,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:10,943 INFO L225 Difference]: With dead ends: 3851 [2021-06-04 21:41:10,943 INFO L226 Difference]: Without dead ends: 3276 [2021-06-04 21:41:10,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 667.0ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:41:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-04 21:41:10,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-06-04 21:41:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-04 21:41:10,968 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 80 [2021-06-04 21:41:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:10,968 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-04 21:41:10,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-04 21:41:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:10,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:10,970 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:11,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-04 21:41:11,170 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:11,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:11,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-06-04 21:41:11,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:11,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807541957] [2021-06-04 21:41:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:11,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:11,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807541957] [2021-06-04 21:41:11,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807541957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:11,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320927077] [2021-06-04 21:41:11,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:11,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-04 21:41:11,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:11,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:11,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:11,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320927077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:11,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:11,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:41:11,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058763030] [2021-06-04 21:41:11,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:11,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:11,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:11,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:11,644 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:12,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:12,013 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-06-04 21:41:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:41:12,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:12,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:12,017 INFO L225 Difference]: With dead ends: 3446 [2021-06-04 21:41:12,017 INFO L226 Difference]: Without dead ends: 3176 [2021-06-04 21:41:12,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:41:12,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-04 21:41:12,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-06-04 21:41:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-04 21:41:12,039 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-04 21:41:12,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:12,039 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-04 21:41:12,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:12,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-04 21:41:12,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:12,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:12,042 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:12,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-04 21:41:12,245 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1817713047, now seen corresponding path program 52 times [2021-06-04 21:41:12,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:12,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887897277] [2021-06-04 21:41:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:12,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:12,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887897277] [2021-06-04 21:41:12,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887897277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:12,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983529129] [2021-06-04 21:41:12,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:12,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:12,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:12,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:12,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:12,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983529129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:12,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:12,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:41:12,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425476829] [2021-06-04 21:41:12,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:12,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:12,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:12,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:12,747 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:13,188 INFO L93 Difference]: Finished difference Result 3641 states and 9487 transitions. [2021-06-04 21:41:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:41:13,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:13,192 INFO L225 Difference]: With dead ends: 3641 [2021-06-04 21:41:13,192 INFO L226 Difference]: Without dead ends: 3371 [2021-06-04 21:41:13,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 504.0ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:41:13,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-06-04 21:41:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2603. [2021-06-04 21:41:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-04 21:41:13,222 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-04 21:41:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:13,222 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-04 21:41:13,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:13,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-04 21:41:13,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:13,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:13,225 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:13,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:13,425 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:13,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:13,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1363496873, now seen corresponding path program 53 times [2021-06-04 21:41:13,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:13,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824953519] [2021-06-04 21:41:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:13,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:13,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824953519] [2021-06-04 21:41:13,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824953519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:13,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306568909] [2021-06-04 21:41:13,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:13,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:41:13,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:13,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:13,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:13,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306568909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:13,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:13,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:41:13,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579317783] [2021-06-04 21:41:13,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:13,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:13,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:13,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:13,864 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:14,289 INFO L93 Difference]: Finished difference Result 3596 states and 9397 transitions. [2021-06-04 21:41:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:41:14,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:14,293 INFO L225 Difference]: With dead ends: 3596 [2021-06-04 21:41:14,293 INFO L226 Difference]: Without dead ends: 3326 [2021-06-04 21:41:14,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:41:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-06-04 21:41:14,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2603. [2021-06-04 21:41:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-04 21:41:14,317 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-04 21:41:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:14,317 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-04 21:41:14,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:14,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-04 21:41:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:14,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:14,319 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:14,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:14,520 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:14,520 INFO L82 PathProgramCache]: Analyzing trace with hash -364600537, now seen corresponding path program 54 times [2021-06-04 21:41:14,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:14,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37564274] [2021-06-04 21:41:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:14,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:14,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37564274] [2021-06-04 21:41:14,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37564274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:14,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248511404] [2021-06-04 21:41:14,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:14,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:41:14,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:14,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:14,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:15,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248511404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:15,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:15,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:41:15,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999059651] [2021-06-04 21:41:15,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:15,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:15,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:15,016 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:15,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:15,558 INFO L93 Difference]: Finished difference Result 3546 states and 9297 transitions. [2021-06-04 21:41:15,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:41:15,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:15,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:15,561 INFO L225 Difference]: With dead ends: 3546 [2021-06-04 21:41:15,561 INFO L226 Difference]: Without dead ends: 3276 [2021-06-04 21:41:15,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 547.6ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:41:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-04 21:41:15,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-06-04 21:41:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:15,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-04 21:41:15,585 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-04 21:41:15,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:15,585 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-04 21:41:15,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-04 21:41:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:15,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:15,588 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:15,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:15,788 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:15,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:15,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2051038869, now seen corresponding path program 55 times [2021-06-04 21:41:15,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:15,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776493818] [2021-06-04 21:41:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:15,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:15,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776493818] [2021-06-04 21:41:15,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776493818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:15,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091053847] [2021-06-04 21:41:15,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:16,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:16,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:16,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091053847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:16,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:16,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:41:16,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415234558] [2021-06-04 21:41:16,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:16,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:16,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:16,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:16,216 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:16,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:16,664 INFO L93 Difference]: Finished difference Result 3496 states and 9197 transitions. [2021-06-04 21:41:16,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:41:16,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:16,668 INFO L225 Difference]: With dead ends: 3496 [2021-06-04 21:41:16,668 INFO L226 Difference]: Without dead ends: 3226 [2021-06-04 21:41:16,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:41:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-04 21:41:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-04 21:41:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-04 21:41:16,696 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-04 21:41:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:16,696 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-04 21:41:16,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-04 21:41:16,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:16,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:16,698 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:16,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-04 21:41:16,899 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:16,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:16,899 INFO L82 PathProgramCache]: Analyzing trace with hash -213609115, now seen corresponding path program 56 times [2021-06-04 21:41:16,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:16,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450335959] [2021-06-04 21:41:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:17,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:17,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450335959] [2021-06-04 21:41:17,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450335959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:17,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43334415] [2021-06-04 21:41:17,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:17,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:17,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:17,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:17,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:17,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43334415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:17,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:17,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:41:17,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126335403] [2021-06-04 21:41:17,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:17,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:17,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:17,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:17,325 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:17,917 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-06-04 21:41:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:41:17,917 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:17,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:17,921 INFO L225 Difference]: With dead ends: 3446 [2021-06-04 21:41:17,921 INFO L226 Difference]: Without dead ends: 3176 [2021-06-04 21:41:17,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 571.1ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:41:17,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-04 21:41:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-06-04 21:41:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-04 21:41:17,947 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-04 21:41:17,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:17,947 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-04 21:41:17,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:17,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-04 21:41:17,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:17,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:17,949 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:18,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:18,150 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:18,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:18,150 INFO L82 PathProgramCache]: Analyzing trace with hash 400630355, now seen corresponding path program 57 times [2021-06-04 21:41:18,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:18,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097809815] [2021-06-04 21:41:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:18,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:18,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097809815] [2021-06-04 21:41:18,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097809815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:18,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302764274] [2021-06-04 21:41:18,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:18,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-04 21:41:18,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:18,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:18,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:18,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302764274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:18,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:18,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:41:18,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797396139] [2021-06-04 21:41:18,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:18,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:18,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:18,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:18,588 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:19,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:19,071 INFO L93 Difference]: Finished difference Result 3396 states and 8997 transitions. [2021-06-04 21:41:19,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:41:19,072 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:19,075 INFO L225 Difference]: With dead ends: 3396 [2021-06-04 21:41:19,075 INFO L226 Difference]: Without dead ends: 3126 [2021-06-04 21:41:19,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:41:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-04 21:41:19,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2603. [2021-06-04 21:41:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:19,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-04 21:41:19,097 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-04 21:41:19,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:19,097 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-04 21:41:19,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:19,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-04 21:41:19,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:19,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:19,099 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:19,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-04 21:41:19,300 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:19,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:19,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1314611933, now seen corresponding path program 58 times [2021-06-04 21:41:19,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:19,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759881399] [2021-06-04 21:41:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:19,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:19,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759881399] [2021-06-04 21:41:19,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759881399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:19,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050868980] [2021-06-04 21:41:19,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:19,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:19,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:19,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:19,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:19,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050868980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:19,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:19,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:41:19,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650571639] [2021-06-04 21:41:19,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:19,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:19,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:19,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:19,741 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:20,417 INFO L93 Difference]: Finished difference Result 3406 states and 9047 transitions. [2021-06-04 21:41:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:41:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:20,421 INFO L225 Difference]: With dead ends: 3406 [2021-06-04 21:41:20,421 INFO L226 Difference]: Without dead ends: 3136 [2021-06-04 21:41:20,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 657.3ms TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:41:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-06-04 21:41:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2603. [2021-06-04 21:41:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.800922367409685) internal successors, (7288), 2602 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-06-04 21:41:20,443 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-06-04 21:41:20,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:20,443 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-06-04 21:41:20,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-06-04 21:41:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:20,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:20,445 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:20,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:20,646 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:20,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1947707761, now seen corresponding path program 59 times [2021-06-04 21:41:20,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:20,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146755609] [2021-06-04 21:41:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:20,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:20,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146755609] [2021-06-04 21:41:20,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146755609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:20,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747686052] [2021-06-04 21:41:20,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:20,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:41:20,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:20,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:21,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747686052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:21,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:21,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:41:21,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42009624] [2021-06-04 21:41:21,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:21,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:21,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:21,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:21,039 INFO L87 Difference]: Start difference. First operand 2603 states and 7288 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:21,589 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-06-04 21:41:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:41:21,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:21,593 INFO L225 Difference]: With dead ends: 4148 [2021-06-04 21:41:21,593 INFO L226 Difference]: Without dead ends: 3878 [2021-06-04 21:41:21,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 499.3ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:41:21,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-06-04 21:41:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-06-04 21:41:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 2.8206326383896476) internal successors, (7847), 2782 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-06-04 21:41:21,621 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-06-04 21:41:21,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:21,621 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-06-04 21:41:21,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:21,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-06-04 21:41:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:21,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:21,623 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:21,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-04 21:41:21,824 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:21,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1970051011, now seen corresponding path program 60 times [2021-06-04 21:41:21,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:21,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892482387] [2021-06-04 21:41:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:21,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:21,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892482387] [2021-06-04 21:41:21,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892482387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:21,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945006021] [2021-06-04 21:41:21,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:22,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:41:22,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:22,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:22,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:22,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945006021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:22,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:22,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:41:22,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089109756] [2021-06-04 21:41:22,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:22,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:22,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:22,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:22,260 INFO L87 Difference]: Start difference. First operand 2783 states and 7847 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:23,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:23,017 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-06-04 21:41:23,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:41:23,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:23,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:23,021 INFO L225 Difference]: With dead ends: 4016 [2021-06-04 21:41:23,021 INFO L226 Difference]: Without dead ends: 3441 [2021-06-04 21:41:23,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 722.2ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:41:23,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-04 21:41:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-06-04 21:41:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.733229329173167) internal successors, (5256), 1923 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-06-04 21:41:23,042 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-06-04 21:41:23,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:23,042 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-06-04 21:41:23,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-06-04 21:41:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:41:23,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:23,044 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:23,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:23,244 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash 834350121, now seen corresponding path program 61 times [2021-06-04 21:41:23,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:23,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665682291] [2021-06-04 21:41:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:23,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:23,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665682291] [2021-06-04 21:41:23,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665682291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:23,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227949311] [2021-06-04 21:41:23,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:23,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:23,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:23,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227949311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:23,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:23,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-04 21:41:23,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634909021] [2021-06-04 21:41:23,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:41:23,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:23,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:41:23,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:41:23,792 INFO L87 Difference]: Start difference. First operand 1924 states and 5256 transitions. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:24,238 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-06-04 21:41:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:41:24,239 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:41:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:24,241 INFO L225 Difference]: With dead ends: 2864 [2021-06-04 21:41:24,241 INFO L226 Difference]: Without dead ends: 2530 [2021-06-04 21:41:24,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 521.9ms TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:41:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-04 21:41:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-06-04 21:41:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 2.702191235059761) internal successors, (5426), 2008 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-06-04 21:41:24,260 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-06-04 21:41:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:24,260 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-06-04 21:41:24,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-06-04 21:41:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:41:24,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:24,262 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:24,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-04 21:41:24,481 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash -207325971, now seen corresponding path program 62 times [2021-06-04 21:41:24,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:24,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276544526] [2021-06-04 21:41:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:24,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:24,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276544526] [2021-06-04 21:41:24,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276544526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:24,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191969761] [2021-06-04 21:41:24,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:24,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:24,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:24,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:41:24,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:24,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191969761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:24,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:24,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:41:24,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342822773] [2021-06-04 21:41:24,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:24,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:24,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:24,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:24,937 INFO L87 Difference]: Start difference. First operand 2009 states and 5426 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:25,263 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-06-04 21:41:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:41:25,263 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:41:25,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:25,266 INFO L225 Difference]: With dead ends: 3386 [2021-06-04 21:41:25,266 INFO L226 Difference]: Without dead ends: 3116 [2021-06-04 21:41:25,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 384.8ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:41:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-04 21:41:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-06-04 21:41:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.715148698884758) internal successors, (5843), 2152 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-06-04 21:41:25,286 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-06-04 21:41:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:25,287 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-06-04 21:41:25,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-06-04 21:41:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:41:25,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:25,288 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:25,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-04 21:41:25,489 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:25,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:25,490 INFO L82 PathProgramCache]: Analyzing trace with hash -452403267, now seen corresponding path program 63 times [2021-06-04 21:41:25,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:25,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789233850] [2021-06-04 21:41:25,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:25,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:25,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789233850] [2021-06-04 21:41:25,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789233850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:25,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391857363] [2021-06-04 21:41:25,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:25,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-04 21:41:25,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:25,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:41:25,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:25,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391857363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:25,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:25,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:41:25,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127366095] [2021-06-04 21:41:25,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:25,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:25,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:25,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:25,961 INFO L87 Difference]: Start difference. First operand 2153 states and 5843 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:26,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:26,394 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-06-04 21:41:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:41:26,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:41:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:26,397 INFO L225 Difference]: With dead ends: 3346 [2021-06-04 21:41:26,397 INFO L226 Difference]: Without dead ends: 3076 [2021-06-04 21:41:26,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:41:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-06-04 21:41:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-06-04 21:41:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.724741805118994) internal successors, (6068), 2227 states have internal predecessors, (6068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-06-04 21:41:26,421 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-06-04 21:41:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:26,421 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-06-04 21:41:26,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-06-04 21:41:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:41:26,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:26,423 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:26,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:26,624 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:26,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:26,624 INFO L82 PathProgramCache]: Analyzing trace with hash -829253589, now seen corresponding path program 64 times [2021-06-04 21:41:26,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:26,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177603607] [2021-06-04 21:41:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:26,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:26,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177603607] [2021-06-04 21:41:26,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177603607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:26,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982535978] [2021-06-04 21:41:26,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:26,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:26,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:26,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:41:26,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:27,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982535978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:27,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:27,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:41:27,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425323105] [2021-06-04 21:41:27,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:27,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:27,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:27,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:27,102 INFO L87 Difference]: Start difference. First operand 2228 states and 6068 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:27,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:27,492 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-06-04 21:41:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:41:27,493 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:41:27,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:27,496 INFO L225 Difference]: With dead ends: 3396 [2021-06-04 21:41:27,496 INFO L226 Difference]: Without dead ends: 3126 [2021-06-04 21:41:27,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 418.0ms TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:41:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-04 21:41:27,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-06-04 21:41:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7337098175499563) internal successors, (6293), 2302 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-06-04 21:41:27,519 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-06-04 21:41:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:27,519 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-06-04 21:41:27,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-06-04 21:41:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:41:27,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:27,521 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:27,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:27,722 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:27,722 INFO L82 PathProgramCache]: Analyzing trace with hash 497501947, now seen corresponding path program 65 times [2021-06-04 21:41:27,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:27,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177193576] [2021-06-04 21:41:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:27,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:27,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177193576] [2021-06-04 21:41:27,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177193576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:27,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121279365] [2021-06-04 21:41:27,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:27,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-04 21:41:27,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:27,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:41:27,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:28,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121279365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:28,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:28,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:41:28,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468930491] [2021-06-04 21:41:28,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:28,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:28,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:28,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:28,173 INFO L87 Difference]: Start difference. First operand 2303 states and 6293 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:28,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:28,681 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-06-04 21:41:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:41:28,681 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:41:28,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:28,684 INFO L225 Difference]: With dead ends: 3421 [2021-06-04 21:41:28,684 INFO L226 Difference]: Without dead ends: 3151 [2021-06-04 21:41:28,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 519.8ms TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:41:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-04 21:41:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-06-04 21:41:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7421119057635677) internal successors, (6518), 2377 states have internal predecessors, (6518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:28,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-06-04 21:41:28,707 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-06-04 21:41:28,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:28,707 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-06-04 21:41:28,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:28,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-06-04 21:41:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:41:28,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:28,710 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:28,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-04 21:41:28,932 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:28,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:28,933 INFO L82 PathProgramCache]: Analyzing trace with hash 951718121, now seen corresponding path program 66 times [2021-06-04 21:41:28,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:28,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522589261] [2021-06-04 21:41:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:29,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:29,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522589261] [2021-06-04 21:41:29,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522589261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:29,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103737258] [2021-06-04 21:41:29,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:29,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-04 21:41:29,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:29,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:41:29,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:29,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103737258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:29,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:29,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:41:29,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165435315] [2021-06-04 21:41:29,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:29,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:29,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:29,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:29,366 INFO L87 Difference]: Start difference. First operand 2378 states and 6518 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:29,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:29,812 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-06-04 21:41:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:41:29,813 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:41:29,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:29,816 INFO L225 Difference]: With dead ends: 3446 [2021-06-04 21:41:29,816 INFO L226 Difference]: Without dead ends: 3176 [2021-06-04 21:41:29,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 437.8ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:41:29,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-04 21:41:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-06-04 21:41:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.75) internal successors, (6743), 2452 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-06-04 21:41:29,860 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-06-04 21:41:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:29,861 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-06-04 21:41:29,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-06-04 21:41:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:41:29,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:29,863 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:30,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:30,069 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:30,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:30,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1950614457, now seen corresponding path program 67 times [2021-06-04 21:41:30,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:30,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373021266] [2021-06-04 21:41:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:30,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:30,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373021266] [2021-06-04 21:41:30,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373021266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:30,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140349909] [2021-06-04 21:41:30,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:30,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:41:30,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:30,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140349909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:30,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:30,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:41:30,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034697423] [2021-06-04 21:41:30,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:30,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:30,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:30,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:30,497 INFO L87 Difference]: Start difference. First operand 2453 states and 6743 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:31,077 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-06-04 21:41:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:41:31,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:41:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:31,080 INFO L225 Difference]: With dead ends: 3471 [2021-06-04 21:41:31,080 INFO L226 Difference]: Without dead ends: 3201 [2021-06-04 21:41:31,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 569.2ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:41:31,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-06-04 21:41:31,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-06-04 21:41:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7574198654531066) internal successors, (6968), 2527 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-06-04 21:41:31,105 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-06-04 21:41:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:31,105 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-06-04 21:41:31,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-06-04 21:41:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:41:31,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:31,107 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:31,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-04 21:41:31,307 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:31,308 INFO L82 PathProgramCache]: Analyzing trace with hash 71286567, now seen corresponding path program 68 times [2021-06-04 21:41:31,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:31,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382977569] [2021-06-04 21:41:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:31,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:31,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382977569] [2021-06-04 21:41:31,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382977569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:31,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488060649] [2021-06-04 21:41:31,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:31,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:31,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:31,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:41:31,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:31,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488060649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:31,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:31,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:41:31,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467434518] [2021-06-04 21:41:31,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:31,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:31,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:31,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:31,716 INFO L87 Difference]: Start difference. First operand 2528 states and 6968 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:32,186 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-06-04 21:41:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:41:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:41:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:32,190 INFO L225 Difference]: With dead ends: 3496 [2021-06-04 21:41:32,190 INFO L226 Difference]: Without dead ends: 3226 [2021-06-04 21:41:32,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 462.4ms TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:41:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-04 21:41:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-04 21:41:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.764411990776326) internal successors, (7193), 2602 states have internal predecessors, (7193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-06-04 21:41:32,215 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-06-04 21:41:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:32,215 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-06-04 21:41:32,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:32,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-06-04 21:41:32,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:41:32,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:32,217 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:32,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:32,419 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2101605879, now seen corresponding path program 69 times [2021-06-04 21:41:32,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:32,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471352524] [2021-06-04 21:41:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:32,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:32,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471352524] [2021-06-04 21:41:32,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471352524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:32,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586456872] [2021-06-04 21:41:32,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:32,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-04 21:41:32,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:32,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:41:32,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:32,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586456872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:32,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:32,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:41:32,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315037547] [2021-06-04 21:41:32,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:32,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:32,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:32,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:32,902 INFO L87 Difference]: Start difference. First operand 2603 states and 7193 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:33,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:33,555 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-06-04 21:41:33,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:41:33,556 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:41:33,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:33,560 INFO L225 Difference]: With dead ends: 3521 [2021-06-04 21:41:33,560 INFO L226 Difference]: Without dead ends: 3251 [2021-06-04 21:41:33,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:41:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-04 21:41:33,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-06-04 21:41:33,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.771012327231976) internal successors, (7418), 2677 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-06-04 21:41:33,595 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-06-04 21:41:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:33,595 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-06-04 21:41:33,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-06-04 21:41:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:41:33,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:33,597 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:33,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-04 21:41:33,797 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:33,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:33,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1579121947, now seen corresponding path program 70 times [2021-06-04 21:41:33,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:33,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64004636] [2021-06-04 21:41:33,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:33,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:33,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64004636] [2021-06-04 21:41:33,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64004636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:33,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314167861] [2021-06-04 21:41:33,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:34,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:34,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:34,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:41:34,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:34,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314167861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:34,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:34,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:41:34,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272693196] [2021-06-04 21:41:34,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:34,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:34,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:34,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:34,212 INFO L87 Difference]: Start difference. First operand 2678 states and 7418 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:34,728 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-06-04 21:41:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:41:34,729 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:41:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:34,732 INFO L225 Difference]: With dead ends: 3591 [2021-06-04 21:41:34,732 INFO L226 Difference]: Without dead ends: 3321 [2021-06-04 21:41:34,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 503.3ms TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:41:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-04 21:41:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-06-04 21:41:34,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.782703488372093) internal successors, (7658), 2752 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:34,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-06-04 21:41:34,759 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-06-04 21:41:34,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:34,759 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-06-04 21:41:34,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-06-04 21:41:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:41:34,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:34,761 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:34,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:34,965 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:34,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:34,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1000603061, now seen corresponding path program 71 times [2021-06-04 21:41:34,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:34,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648803487] [2021-06-04 21:41:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:35,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:35,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648803487] [2021-06-04 21:41:35,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648803487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:35,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41168391] [2021-06-04 21:41:35,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:35,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-04 21:41:35,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:35,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:41:35,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:35,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41168391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:35,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:35,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:41:35,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531891745] [2021-06-04 21:41:35,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:35,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:35,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:35,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:35,398 INFO L87 Difference]: Start difference. First operand 2753 states and 7658 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:36,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:36,187 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-06-04 21:41:36,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:41:36,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:41:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:36,191 INFO L225 Difference]: With dead ends: 4169 [2021-06-04 21:41:36,191 INFO L226 Difference]: Without dead ends: 3546 [2021-06-04 21:41:36,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 717.2ms TimeCoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:41:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-04 21:41:36,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-06-04 21:41:36,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.790237000353732) internal successors, (7888), 2827 states have internal predecessors, (7888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-06-04 21:41:36,220 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-06-04 21:41:36,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:36,220 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-06-04 21:41:36,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:36,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-06-04 21:41:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:41:36,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:36,222 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:36,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-04 21:41:36,422 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:36,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:36,423 INFO L82 PathProgramCache]: Analyzing trace with hash -32044541, now seen corresponding path program 72 times [2021-06-04 21:41:36,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:36,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34601247] [2021-06-04 21:41:36,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:36,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:36,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34601247] [2021-06-04 21:41:36,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34601247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:36,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135503477] [2021-06-04 21:41:36,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:36,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-04 21:41:36,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:36,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:41:36,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:36,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135503477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:36,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:36,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:41:36,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800087613] [2021-06-04 21:41:36,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:36,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:36,836 INFO L87 Difference]: Start difference. First operand 2828 states and 7888 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:37,408 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-06-04 21:41:37,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:41:37,408 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:41:37,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:37,412 INFO L225 Difference]: With dead ends: 4398 [2021-06-04 21:41:37,412 INFO L226 Difference]: Without dead ends: 4128 [2021-06-04 21:41:37,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:41:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-04 21:41:37,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-06-04 21:41:37,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.809112071832391) internal successors, (8447), 3007 states have internal predecessors, (8447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-06-04 21:41:37,443 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-06-04 21:41:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:37,443 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-06-04 21:41:37,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-06-04 21:41:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:41:37,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:37,445 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:37,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:37,646 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:37,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:37,646 INFO L82 PathProgramCache]: Analyzing trace with hash -9701291, now seen corresponding path program 73 times [2021-06-04 21:41:37,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:37,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510478521] [2021-06-04 21:41:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:37,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:37,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510478521] [2021-06-04 21:41:37,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510478521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:37,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197731668] [2021-06-04 21:41:37,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:37,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:41:37,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:38,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197731668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:38,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:38,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:41:38,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754159614] [2021-06-04 21:41:38,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:38,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:38,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:38,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:38,060 INFO L87 Difference]: Start difference. First operand 3008 states and 8447 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:38,844 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-06-04 21:41:38,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:41:38,844 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:41:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:38,847 INFO L225 Difference]: With dead ends: 3885 [2021-06-04 21:41:38,847 INFO L226 Difference]: Without dead ends: 3306 [2021-06-04 21:41:38,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 739.9ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:41:38,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-04 21:41:38,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-06-04 21:41:38,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7357954545454546) internal successors, (5778), 2112 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-06-04 21:41:38,868 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-06-04 21:41:38,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:38,868 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-06-04 21:41:38,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:38,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-06-04 21:41:38,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:41:38,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:38,870 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:39,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:39,071 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:39,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:39,071 INFO L82 PathProgramCache]: Analyzing trace with hash -567911574, now seen corresponding path program 74 times [2021-06-04 21:41:39,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:39,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279336654] [2021-06-04 21:41:39,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:39,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:39,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279336654] [2021-06-04 21:41:39,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279336654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:39,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453489105] [2021-06-04 21:41:39,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:39,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:39,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:39,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:39,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453489105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:39,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:39,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:41:39,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499675298] [2021-06-04 21:41:39,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:39,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:39,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:39,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:39,585 INFO L87 Difference]: Start difference. First operand 2113 states and 5778 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:40,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:40,011 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-06-04 21:41:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:41:40,011 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:41:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:40,014 INFO L225 Difference]: With dead ends: 3131 [2021-06-04 21:41:40,014 INFO L226 Difference]: Without dead ends: 2861 [2021-06-04 21:41:40,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 462.7ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:41:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-04 21:41:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-06-04 21:41:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.7448559670781894) internal successors, (6003), 2187 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-06-04 21:41:40,034 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-06-04 21:41:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:40,034 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-06-04 21:41:40,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-06-04 21:41:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:41:40,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:40,036 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:40,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:40,236 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:40,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:40,237 INFO L82 PathProgramCache]: Analyzing trace with hash -812988870, now seen corresponding path program 75 times [2021-06-04 21:41:40,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:40,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293223129] [2021-06-04 21:41:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:40,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:40,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293223129] [2021-06-04 21:41:40,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293223129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:40,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868331928] [2021-06-04 21:41:40,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:40,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-04 21:41:40,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:40,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:40,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:40,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868331928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:40,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:40,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:41:40,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346696831] [2021-06-04 21:41:40,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:41:40,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:40,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:41:40,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:41:40,723 INFO L87 Difference]: Start difference. First operand 2188 states and 6003 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:41,190 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-06-04 21:41:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:41:41,190 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:41:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:41,193 INFO L225 Difference]: With dead ends: 3451 [2021-06-04 21:41:41,193 INFO L226 Difference]: Without dead ends: 3181 [2021-06-04 21:41:41,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:41:41,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-04 21:41:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-06-04 21:41:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.753315649867374) internal successors, (6228), 2262 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-06-04 21:41:41,214 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-06-04 21:41:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:41,214 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-06-04 21:41:41,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-06-04 21:41:41,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:41:41,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:41,216 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:41,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:41,417 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1189839192, now seen corresponding path program 76 times [2021-06-04 21:41:41,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:41,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159457760] [2021-06-04 21:41:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:41,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:41,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159457760] [2021-06-04 21:41:41,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159457760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:41,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207377309] [2021-06-04 21:41:41,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:41,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:41,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:41,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:41,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:41,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207377309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:41,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:41,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:41:41,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462925016] [2021-06-04 21:41:41,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:41,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:41,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:41,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:41,877 INFO L87 Difference]: Start difference. First operand 2263 states and 6228 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:42,335 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-06-04 21:41:42,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:41:42,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:41:42,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:42,338 INFO L225 Difference]: With dead ends: 3481 [2021-06-04 21:41:42,338 INFO L226 Difference]: Without dead ends: 3211 [2021-06-04 21:41:42,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 487.0ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:41:42,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-04 21:41:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-06-04 21:41:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.761232349165597) internal successors, (6453), 2337 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-06-04 21:41:42,364 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-06-04 21:41:42,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:42,364 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-06-04 21:41:42,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-06-04 21:41:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:41:42,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:42,366 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:42,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:42,567 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash 136916344, now seen corresponding path program 77 times [2021-06-04 21:41:42,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:42,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646562031] [2021-06-04 21:41:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:42,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:42,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646562031] [2021-06-04 21:41:42,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646562031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:42,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301341835] [2021-06-04 21:41:42,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:42,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-04 21:41:42,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:42,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:42,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:43,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301341835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:43,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:43,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:41:43,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914767363] [2021-06-04 21:41:43,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:41:43,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:43,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:41:43,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:41:43,036 INFO L87 Difference]: Start difference. First operand 2338 states and 6453 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:43,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:43,596 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-06-04 21:41:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:41:43,596 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:41:43,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:43,599 INFO L225 Difference]: With dead ends: 3506 [2021-06-04 21:41:43,599 INFO L226 Difference]: Without dead ends: 3236 [2021-06-04 21:41:43,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 576.9ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:41:43,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-04 21:41:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-06-04 21:41:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.7686567164179103) internal successors, (6678), 2412 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-06-04 21:41:43,623 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-06-04 21:41:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:43,623 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-06-04 21:41:43,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-06-04 21:41:43,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:41:43,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:43,625 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:43,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:43,826 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:43,826 INFO L82 PathProgramCache]: Analyzing trace with hash 591132518, now seen corresponding path program 78 times [2021-06-04 21:41:43,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:43,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571348650] [2021-06-04 21:41:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:44,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:44,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571348650] [2021-06-04 21:41:44,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571348650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:44,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399112391] [2021-06-04 21:41:44,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:44,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-04 21:41:44,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:44,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:44,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:44,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399112391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:44,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:44,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:41:44,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464214148] [2021-06-04 21:41:44,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:44,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:44,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:44,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:44,289 INFO L87 Difference]: Start difference. First operand 2413 states and 6678 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:44,793 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-06-04 21:41:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:41:44,793 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:41:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:44,796 INFO L225 Difference]: With dead ends: 3531 [2021-06-04 21:41:44,796 INFO L226 Difference]: Without dead ends: 3261 [2021-06-04 21:41:44,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 503.4ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:41:44,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-06-04 21:41:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-06-04 21:41:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7756332931242462) internal successors, (6903), 2487 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-06-04 21:41:44,822 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-06-04 21:41:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:44,822 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-06-04 21:41:44,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-06-04 21:41:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:41:44,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:44,824 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:45,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:45,025 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:45,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1590028854, now seen corresponding path program 79 times [2021-06-04 21:41:45,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:45,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979614565] [2021-06-04 21:41:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:45,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:45,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979614565] [2021-06-04 21:41:45,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979614565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:45,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444906338] [2021-06-04 21:41:45,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:45,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:45,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:45,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444906338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:45,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:45,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:41:45,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159098284] [2021-06-04 21:41:45,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:41:45,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:45,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:41:45,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:41:45,492 INFO L87 Difference]: Start difference. First operand 2488 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:46,128 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-06-04 21:41:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:41:46,128 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:41:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:46,131 INFO L225 Difference]: With dead ends: 3556 [2021-06-04 21:41:46,132 INFO L226 Difference]: Without dead ends: 3286 [2021-06-04 21:41:46,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 623.0ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:41:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-04 21:41:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-06-04 21:41:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.782201405152225) internal successors, (7128), 2562 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-06-04 21:41:46,156 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-06-04 21:41:46,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:46,157 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-06-04 21:41:46,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-06-04 21:41:46,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:41:46,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:46,159 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:46,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-04 21:41:46,359 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:46,359 INFO L82 PathProgramCache]: Analyzing trace with hash -289299036, now seen corresponding path program 80 times [2021-06-04 21:41:46,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:46,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72147042] [2021-06-04 21:41:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:46,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:46,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72147042] [2021-06-04 21:41:46,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72147042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:46,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452679004] [2021-06-04 21:41:46,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:46,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:46,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:46,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:46,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:46,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452679004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:46,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:46,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:41:46,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691449376] [2021-06-04 21:41:46,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:46,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:46,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:46,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:46,809 INFO L87 Difference]: Start difference. First operand 2563 states and 7128 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:47,371 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-06-04 21:41:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:41:47,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:41:47,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:47,374 INFO L225 Difference]: With dead ends: 3581 [2021-06-04 21:41:47,374 INFO L226 Difference]: Without dead ends: 3311 [2021-06-04 21:41:47,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 547.5ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:41:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-06-04 21:41:47,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-06-04 21:41:47,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.78839590443686) internal successors, (7353), 2637 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-06-04 21:41:47,400 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-06-04 21:41:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:47,400 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-06-04 21:41:47,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-06-04 21:41:47,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:41:47,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:47,402 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:47,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:47,603 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:47,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1741020276, now seen corresponding path program 81 times [2021-06-04 21:41:47,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:47,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339365840] [2021-06-04 21:41:47,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:47,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:47,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339365840] [2021-06-04 21:41:47,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339365840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:47,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122340936] [2021-06-04 21:41:47,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:47,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-04 21:41:47,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:47,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:47,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:48,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122340936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:48,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:48,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:41:48,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784117965] [2021-06-04 21:41:48,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:41:48,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:41:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:41:48,088 INFO L87 Difference]: Start difference. First operand 2638 states and 7353 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:48,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:48,818 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-06-04 21:41:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:41:48,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:41:48,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:48,821 INFO L225 Difference]: With dead ends: 3606 [2021-06-04 21:41:48,821 INFO L226 Difference]: Without dead ends: 3336 [2021-06-04 21:41:48,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 700.6ms TimeCoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:41:48,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-04 21:41:48,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-06-04 21:41:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7942477876106193) internal successors, (7578), 2712 states have internal predecessors, (7578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-06-04 21:41:48,848 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-06-04 21:41:48,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:48,848 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-06-04 21:41:48,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:48,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-06-04 21:41:48,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:41:48,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:48,850 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:49,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-04 21:41:49,051 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:49,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1939707550, now seen corresponding path program 82 times [2021-06-04 21:41:49,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:49,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97092935] [2021-06-04 21:41:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:49,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:49,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97092935] [2021-06-04 21:41:49,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97092935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:49,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310096246] [2021-06-04 21:41:49,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:49,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:49,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:49,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:49,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:49,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310096246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:49,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:49,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:41:49,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640820487] [2021-06-04 21:41:49,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:49,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:49,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:49,513 INFO L87 Difference]: Start difference. First operand 2713 states and 7578 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:50,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:50,123 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-06-04 21:41:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:41:50,124 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:41:50,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:50,127 INFO L225 Difference]: With dead ends: 3631 [2021-06-04 21:41:50,127 INFO L226 Difference]: Without dead ends: 3361 [2021-06-04 21:41:50,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 566.8ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:41:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-04 21:41:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-06-04 21:41:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.79978471474704) internal successors, (7803), 2787 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-06-04 21:41:50,154 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-06-04 21:41:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:50,154 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-06-04 21:41:50,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-06-04 21:41:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:41:50,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:50,156 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:50,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:50,357 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:50,357 INFO L82 PathProgramCache]: Analyzing trace with hash 640017458, now seen corresponding path program 83 times [2021-06-04 21:41:50,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:50,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867395308] [2021-06-04 21:41:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:50,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:50,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867395308] [2021-06-04 21:41:50,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867395308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:50,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830554578] [2021-06-04 21:41:50,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:50,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-04 21:41:50,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:50,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:50,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:50,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830554578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:50,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:50,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:41:50,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648117279] [2021-06-04 21:41:50,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:41:50,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:50,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:41:50,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:41:50,834 INFO L87 Difference]: Start difference. First operand 2788 states and 7803 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:51,636 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-06-04 21:41:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:41:51,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:41:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:51,640 INFO L225 Difference]: With dead ends: 3716 [2021-06-04 21:41:51,640 INFO L226 Difference]: Without dead ends: 3446 [2021-06-04 21:41:51,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 769.0ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:41:51,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-04 21:41:51,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-06-04 21:41:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.8120195667365477) internal successors, (8048), 2862 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-06-04 21:41:51,669 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-06-04 21:41:51,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:51,670 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-06-04 21:41:51,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:51,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-06-04 21:41:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:41:51,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:51,673 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:51,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:51,873 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:51,874 INFO L82 PathProgramCache]: Analyzing trace with hash -392630144, now seen corresponding path program 84 times [2021-06-04 21:41:51,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:51,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595189530] [2021-06-04 21:41:51,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:52,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:52,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595189530] [2021-06-04 21:41:52,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595189530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:52,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506474797] [2021-06-04 21:41:52,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:52,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-04 21:41:52,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:52,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:52,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:52,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506474797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:52,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:52,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:41:52,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168114703] [2021-06-04 21:41:52,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:52,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:52,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:52,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:52,296 INFO L87 Difference]: Start difference. First operand 2863 states and 8048 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:52,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:52,954 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-06-04 21:41:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:41:52,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:41:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:52,958 INFO L225 Difference]: With dead ends: 4458 [2021-06-04 21:41:52,959 INFO L226 Difference]: Without dead ends: 4188 [2021-06-04 21:41:52,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 616.4ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:41:52,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-04 21:41:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-06-04 21:41:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 2.829388560157791) internal successors, (8607), 3042 states have internal predecessors, (8607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-06-04 21:41:52,990 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-06-04 21:41:52,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:52,990 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-06-04 21:41:52,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-06-04 21:41:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:41:52,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:52,992 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:53,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:53,192 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:53,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:53,193 INFO L82 PathProgramCache]: Analyzing trace with hash -370286894, now seen corresponding path program 85 times [2021-06-04 21:41:53,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:53,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910481377] [2021-06-04 21:41:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:53,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:53,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910481377] [2021-06-04 21:41:53,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910481377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:53,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733743064] [2021-06-04 21:41:53,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:53,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:53,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:53,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733743064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:53,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:53,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:41:53,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748909886] [2021-06-04 21:41:53,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:41:53,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:53,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:41:53,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:41:53,632 INFO L87 Difference]: Start difference. First operand 3043 states and 8607 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:54,429 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-06-04 21:41:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:41:54,430 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:41:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:54,433 INFO L225 Difference]: With dead ends: 3920 [2021-06-04 21:41:54,433 INFO L226 Difference]: Without dead ends: 3431 [2021-06-04 21:41:54,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 766.3ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:41:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-04 21:41:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-06-04 21:41:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.73782587309395) internal successors, (5566), 2033 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-06-04 21:41:54,456 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-06-04 21:41:54,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:54,456 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-06-04 21:41:54,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-06-04 21:41:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:41:54,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:54,457 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:54,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:54,658 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:54,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2121147398, now seen corresponding path program 86 times [2021-06-04 21:41:54,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:54,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159771618] [2021-06-04 21:41:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:54,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:54,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159771618] [2021-06-04 21:41:54,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159771618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:54,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018524311] [2021-06-04 21:41:54,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:54,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:54,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:54,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:41:54,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:55,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018524311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:55,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:55,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2021-06-04 21:41:55,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547572805] [2021-06-04 21:41:55,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:41:55,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:55,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:41:55,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:41:55,218 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:55,730 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-06-04 21:41:55,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:41:55,731 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:41:55,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:55,733 INFO L225 Difference]: With dead ends: 3024 [2021-06-04 21:41:55,733 INFO L226 Difference]: Without dead ends: 2690 [2021-06-04 21:41:55,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 601.2ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:41:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-06-04 21:41:55,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-06-04 21:41:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 2.7082152974504248) internal successors, (5736), 2118 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:55,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-06-04 21:41:55,751 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-06-04 21:41:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:55,752 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-06-04 21:41:55,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:55,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-06-04 21:41:55,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:41:55,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:55,753 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:55,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:55,954 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:55,954 INFO L82 PathProgramCache]: Analyzing trace with hash 93978558, now seen corresponding path program 87 times [2021-06-04 21:41:55,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:55,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625523597] [2021-06-04 21:41:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:56,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:56,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625523597] [2021-06-04 21:41:56,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625523597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:56,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269171335] [2021-06-04 21:41:56,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:56,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:41:56,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:56,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:41:56,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:56,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269171335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:56,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:56,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:41:56,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656208899] [2021-06-04 21:41:56,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:41:56,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:56,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:41:56,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:41:56,484 INFO L87 Difference]: Start difference. First operand 2119 states and 5736 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:56,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:56,866 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-06-04 21:41:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:41:56,866 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:41:56,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:56,869 INFO L225 Difference]: With dead ends: 3646 [2021-06-04 21:41:56,870 INFO L226 Difference]: Without dead ends: 3376 [2021-06-04 21:41:56,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 472.1ms TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:41:56,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-06-04 21:41:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-06-04 21:41:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.720159151193634) internal successors, (6153), 2262 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-06-04 21:41:56,891 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-06-04 21:41:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:56,891 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-06-04 21:41:56,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-06-04 21:41:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:41:56,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:56,893 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:57,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:57,103 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:57,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:57,103 INFO L82 PathProgramCache]: Analyzing trace with hash 903030414, now seen corresponding path program 88 times [2021-06-04 21:41:57,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:57,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917090508] [2021-06-04 21:41:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:57,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:57,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917090508] [2021-06-04 21:41:57,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917090508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:57,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977272118] [2021-06-04 21:41:57,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:57,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:57,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:57,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:41:57,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:57,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977272118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:57,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:57,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-04 21:41:57,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857081230] [2021-06-04 21:41:57,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:41:57,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:57,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:41:57,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:41:57,655 INFO L87 Difference]: Start difference. First operand 2263 states and 6153 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:58,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:58,155 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-06-04 21:41:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:41:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:41:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:58,162 INFO L225 Difference]: With dead ends: 3606 [2021-06-04 21:41:58,162 INFO L226 Difference]: Without dead ends: 3336 [2021-06-04 21:41:58,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 582.3ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:41:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-04 21:41:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-06-04 21:41:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.729139922978177) internal successors, (6378), 2337 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-06-04 21:41:58,184 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-06-04 21:41:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:58,184 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-06-04 21:41:58,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-06-04 21:41:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:41:58,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:58,186 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:58,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-04 21:41:58,387 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:58,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:58,387 INFO L82 PathProgramCache]: Analyzing trace with hash -488919684, now seen corresponding path program 89 times [2021-06-04 21:41:58,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:58,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532713712] [2021-06-04 21:41:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:58,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:58,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532713712] [2021-06-04 21:41:58,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532713712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:58,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942911341] [2021-06-04 21:41:58,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:58,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:41:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:58,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:41:58,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:58,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942911341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:58,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:58,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:41:58,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833406671] [2021-06-04 21:41:58,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:41:58,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:58,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:41:58,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:41:58,951 INFO L87 Difference]: Start difference. First operand 2338 states and 6378 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:59,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:59,399 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-06-04 21:41:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:41:59,399 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:41:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:59,402 INFO L225 Difference]: With dead ends: 3656 [2021-06-04 21:41:59,402 INFO L226 Difference]: Without dead ends: 3386 [2021-06-04 21:41:59,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=369, Invalid=1113, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:41:59,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-04 21:41:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-06-04 21:41:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.737562189054726) internal successors, (6603), 2412 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-06-04 21:41:59,425 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-06-04 21:41:59,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:59,425 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-06-04 21:41:59,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-06-04 21:41:59,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:41:59,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:59,427 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:59,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:59,628 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:59,628 INFO L82 PathProgramCache]: Analyzing trace with hash -733996980, now seen corresponding path program 90 times [2021-06-04 21:41:59,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:59,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289331774] [2021-06-04 21:41:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:59,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:59,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289331774] [2021-06-04 21:41:59,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289331774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:59,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988978922] [2021-06-04 21:41:59,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:59,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:41:59,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:59,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:41:59,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:00,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988978922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:00,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:00,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-04 21:42:00,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451413033] [2021-06-04 21:42:00,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:00,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:00,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:00,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:00,166 INFO L87 Difference]: Start difference. First operand 2413 states and 6603 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:00,752 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-06-04 21:42:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:00,753 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:00,756 INFO L225 Difference]: With dead ends: 3681 [2021-06-04 21:42:00,756 INFO L226 Difference]: Without dead ends: 3411 [2021-06-04 21:42:00,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 632.5ms TimeCoverageRelationStatistics Valid=434, Invalid=1372, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:42:00,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-04 21:42:00,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-06-04 21:42:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7454764776839564) internal successors, (6828), 2487 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-06-04 21:42:00,780 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-06-04 21:42:00,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:00,780 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-06-04 21:42:00,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:00,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-06-04 21:42:00,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:00,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:00,782 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:00,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-04 21:42:00,983 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:00,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:00,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1110847302, now seen corresponding path program 91 times [2021-06-04 21:42:00,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:00,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385262837] [2021-06-04 21:42:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:01,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385262837] [2021-06-04 21:42:01,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385262837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421116787] [2021-06-04 21:42:01,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:01,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:01,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:01,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421116787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:01,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:01,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:01,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87500732] [2021-06-04 21:42:01,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:01,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:01,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:01,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:01,508 INFO L87 Difference]: Start difference. First operand 2488 states and 6828 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:02,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:02,032 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-06-04 21:42:02,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:42:02,032 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:02,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:02,036 INFO L225 Difference]: With dead ends: 3706 [2021-06-04 21:42:02,036 INFO L226 Difference]: Without dead ends: 3436 [2021-06-04 21:42:02,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 550.5ms TimeCoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:42:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-06-04 21:42:02,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-06-04 21:42:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.752927400468384) internal successors, (7053), 2562 states have internal predecessors, (7053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-06-04 21:42:02,061 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-06-04 21:42:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:02,062 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-06-04 21:42:02,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-06-04 21:42:02,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:02,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:02,064 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:02,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:02,264 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:02,264 INFO L82 PathProgramCache]: Analyzing trace with hash 215908234, now seen corresponding path program 92 times [2021-06-04 21:42:02,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:02,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513790845] [2021-06-04 21:42:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:02,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:02,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513790845] [2021-06-04 21:42:02,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513790845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:02,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134691276] [2021-06-04 21:42:02,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:02,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:02,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:02,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:02,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:02,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134691276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:02,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:02,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-04 21:42:02,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110314028] [2021-06-04 21:42:02,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:02,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:02,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:02,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:02,784 INFO L87 Difference]: Start difference. First operand 2563 states and 7053 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:03,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:03,437 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-06-04 21:42:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:42:03,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:03,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:03,441 INFO L225 Difference]: With dead ends: 3731 [2021-06-04 21:42:03,441 INFO L226 Difference]: Without dead ends: 3461 [2021-06-04 21:42:03,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 680.4ms TimeCoverageRelationStatistics Valid=468, Invalid=1512, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:42:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-06-04 21:42:03,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-06-04 21:42:03,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.7599544937428897) internal successors, (7278), 2637 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:03,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-06-04 21:42:03,470 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-06-04 21:42:03,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:03,470 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-06-04 21:42:03,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:03,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-06-04 21:42:03,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:03,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:03,472 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:03,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-04 21:42:03,673 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:03,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:03,674 INFO L82 PathProgramCache]: Analyzing trace with hash 670124408, now seen corresponding path program 93 times [2021-06-04 21:42:03,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:03,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138439773] [2021-06-04 21:42:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:03,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:03,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138439773] [2021-06-04 21:42:03,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138439773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:03,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434747480] [2021-06-04 21:42:03,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:03,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:42:03,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:03,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:04,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434747480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:04,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:04,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:04,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734815715] [2021-06-04 21:42:04,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:04,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:04,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:04,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:04,207 INFO L87 Difference]: Start difference. First operand 2638 states and 7278 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:04,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:04,779 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-06-04 21:42:04,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:42:04,779 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:04,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:04,782 INFO L225 Difference]: With dead ends: 3756 [2021-06-04 21:42:04,782 INFO L226 Difference]: Without dead ends: 3486 [2021-06-04 21:42:04,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 567.9ms TimeCoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:42:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-06-04 21:42:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-06-04 21:42:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7665929203539825) internal successors, (7503), 2712 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-06-04 21:42:04,812 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-06-04 21:42:04,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:04,812 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-06-04 21:42:04,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:04,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-06-04 21:42:04,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:04,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:04,814 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:05,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-04 21:42:05,015 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:05,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:05,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1669020744, now seen corresponding path program 94 times [2021-06-04 21:42:05,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:05,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358832155] [2021-06-04 21:42:05,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:05,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:05,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358832155] [2021-06-04 21:42:05,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358832155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:05,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026657380] [2021-06-04 21:42:05,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:05,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:05,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:05,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:05,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:05,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026657380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:05,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:05,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-04 21:42:05,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251112428] [2021-06-04 21:42:05,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:05,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:05,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:05,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:05,520 INFO L87 Difference]: Start difference. First operand 2713 states and 7503 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:06,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:06,241 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-06-04 21:42:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:42:06,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:06,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:06,245 INFO L225 Difference]: With dead ends: 3781 [2021-06-04 21:42:06,245 INFO L226 Difference]: Without dead ends: 3511 [2021-06-04 21:42:06,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 735.4ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:42:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-04 21:42:06,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-06-04 21:42:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.772874058127018) internal successors, (7728), 2787 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:06,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-06-04 21:42:06,274 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-06-04 21:42:06,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:06,274 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-06-04 21:42:06,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:06,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-06-04 21:42:06,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:06,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:06,276 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:06,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-04 21:42:06,477 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:06,477 INFO L82 PathProgramCache]: Analyzing trace with hash -210307146, now seen corresponding path program 95 times [2021-06-04 21:42:06,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:06,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923007219] [2021-06-04 21:42:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:06,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:06,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923007219] [2021-06-04 21:42:06,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923007219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:06,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850650086] [2021-06-04 21:42:06,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:06,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:42:06,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:06,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:06,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:06,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850650086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:06,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:06,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:06,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832240606] [2021-06-04 21:42:06,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:06,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:06,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:06,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:06,959 INFO L87 Difference]: Start difference. First operand 2788 states and 7728 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:07,583 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-06-04 21:42:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:07,584 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:07,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:07,587 INFO L225 Difference]: With dead ends: 3806 [2021-06-04 21:42:07,587 INFO L226 Difference]: Without dead ends: 3536 [2021-06-04 21:42:07,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 612.3ms TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:42:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-06-04 21:42:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-06-04 21:42:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7788259958071277) internal successors, (7953), 2862 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-06-04 21:42:07,616 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-06-04 21:42:07,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:07,616 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-06-04 21:42:07,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-06-04 21:42:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:07,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:07,618 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:07,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:07,819 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:07,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:07,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1820012166, now seen corresponding path program 96 times [2021-06-04 21:42:07,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:07,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381832777] [2021-06-04 21:42:07,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:08,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:08,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381832777] [2021-06-04 21:42:08,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381832777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:08,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212454158] [2021-06-04 21:42:08,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:08,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:42:08,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:08,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:08,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:08,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212454158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:08,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:08,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-04 21:42:08,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368463749] [2021-06-04 21:42:08,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:08,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:08,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:08,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:08,315 INFO L87 Difference]: Start difference. First operand 2863 states and 7953 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:09,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:09,121 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-06-04 21:42:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:42:09,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:09,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:09,125 INFO L225 Difference]: With dead ends: 3831 [2021-06-04 21:42:09,125 INFO L226 Difference]: Without dead ends: 3561 [2021-06-04 21:42:09,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 796.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1768, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:42:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-04 21:42:09,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-06-04 21:42:09,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7844739530132787) internal successors, (8178), 2937 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-06-04 21:42:09,156 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-06-04 21:42:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:09,156 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-06-04 21:42:09,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-06-04 21:42:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:09,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:09,159 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:09,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-04 21:42:09,359 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:09,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:09,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1860715660, now seen corresponding path program 97 times [2021-06-04 21:42:09,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:09,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520803988] [2021-06-04 21:42:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:09,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:09,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520803988] [2021-06-04 21:42:09,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520803988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:09,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136495070] [2021-06-04 21:42:09,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:09,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:09,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:09,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136495070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:09,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:09,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:09,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62412933] [2021-06-04 21:42:09,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:09,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:09,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:09,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:09,840 INFO L87 Difference]: Start difference. First operand 2938 states and 8178 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:10,497 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-06-04 21:42:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:42:10,497 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:10,501 INFO L225 Difference]: With dead ends: 3856 [2021-06-04 21:42:10,501 INFO L226 Difference]: Without dead ends: 3586 [2021-06-04 21:42:10,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 641.5ms TimeCoverageRelationStatistics Valid=569, Invalid=1593, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:42:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-04 21:42:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-06-04 21:42:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.789840637450199) internal successors, (8403), 3012 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-06-04 21:42:10,531 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-06-04 21:42:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:10,531 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-06-04 21:42:10,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-06-04 21:42:10,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:10,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:10,533 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:10,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:10,741 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash 719009348, now seen corresponding path program 98 times [2021-06-04 21:42:10,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:10,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301373963] [2021-06-04 21:42:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:10,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:10,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301373963] [2021-06-04 21:42:10,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301373963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:10,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713070777] [2021-06-04 21:42:10,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:11,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:11,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:11,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:11,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:11,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713070777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:11,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:11,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-04 21:42:11,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283010438] [2021-06-04 21:42:11,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:11,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:11,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:11,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:11,233 INFO L87 Difference]: Start difference. First operand 3013 states and 8403 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:12,106 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-06-04 21:42:12,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:42:12,107 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:12,110 INFO L225 Difference]: With dead ends: 3941 [2021-06-04 21:42:12,110 INFO L226 Difference]: Without dead ends: 3671 [2021-06-04 21:42:12,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 852.7ms TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:42:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-04 21:42:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-06-04 21:42:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.801425332037577) internal successors, (8648), 3087 states have internal predecessors, (8648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-06-04 21:42:12,141 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-06-04 21:42:12,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:12,141 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-06-04 21:42:12,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:12,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-06-04 21:42:12,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:12,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:12,144 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:12,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-04 21:42:12,345 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:12,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:12,345 INFO L82 PathProgramCache]: Analyzing trace with hash -313638254, now seen corresponding path program 99 times [2021-06-04 21:42:12,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:12,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457933711] [2021-06-04 21:42:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:12,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:12,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457933711] [2021-06-04 21:42:12,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457933711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:12,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345606441] [2021-06-04 21:42:12,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:12,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:42:12,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:12,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:12,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:12,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345606441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:12,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:12,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:12,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396445655] [2021-06-04 21:42:12,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:12,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:12,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:12,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:12,821 INFO L87 Difference]: Start difference. First operand 3088 states and 8648 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:13,529 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-06-04 21:42:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:42:13,529 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:13,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:13,533 INFO L225 Difference]: With dead ends: 4708 [2021-06-04 21:42:13,533 INFO L226 Difference]: Without dead ends: 4438 [2021-06-04 21:42:13,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 682.2ms TimeCoverageRelationStatistics Valid=660, Invalid=1692, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:42:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-06-04 21:42:13,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-06-04 21:42:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 3267 states have (on average 2.8181818181818183) internal successors, (9207), 3267 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-06-04 21:42:13,567 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-06-04 21:42:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:13,567 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-06-04 21:42:13,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-06-04 21:42:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:13,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:13,570 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:13,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:13,770 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:13,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:13,770 INFO L82 PathProgramCache]: Analyzing trace with hash -291295004, now seen corresponding path program 100 times [2021-06-04 21:42:13,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:13,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731539815] [2021-06-04 21:42:13,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:13,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:13,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731539815] [2021-06-04 21:42:13,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731539815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:13,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052457502] [2021-06-04 21:42:13,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:14,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:14,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:14,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:14,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:14,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052457502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:14,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:14,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:14,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356070040] [2021-06-04 21:42:14,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:14,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:14,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:14,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:14,228 INFO L87 Difference]: Start difference. First operand 3268 states and 9207 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:15,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:15,143 INFO L93 Difference]: Finished difference Result 4195 states and 11381 transitions. [2021-06-04 21:42:15,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:42:15,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:15,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:15,147 INFO L225 Difference]: With dead ends: 4195 [2021-06-04 21:42:15,147 INFO L226 Difference]: Without dead ends: 3706 [2021-06-04 21:42:15,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 879.4ms TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:42:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2021-06-04 21:42:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 2313. [2021-06-04 21:42:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 2.737024221453287) internal successors, (6328), 2312 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 6328 transitions. [2021-06-04 21:42:15,171 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 6328 transitions. Word has length 100 [2021-06-04 21:42:15,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:15,171 INFO L482 AbstractCegarLoop]: Abstraction has 2313 states and 6328 transitions. [2021-06-04 21:42:15,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 6328 transitions. [2021-06-04 21:42:15,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:15,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:15,173 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:15,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:15,374 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:15,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:15,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1356878341, now seen corresponding path program 101 times [2021-06-04 21:42:15,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:15,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961916825] [2021-06-04 21:42:15,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:15,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:15,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961916825] [2021-06-04 21:42:15,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961916825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:15,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842207425] [2021-06-04 21:42:15,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:15,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:42:15,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:15,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:15,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:15,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842207425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:15,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:15,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:15,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993094711] [2021-06-04 21:42:15,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:15,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:15,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:15,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:15,933 INFO L87 Difference]: Start difference. First operand 2313 states and 6328 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:16,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:16,402 INFO L93 Difference]: Finished difference Result 3431 states and 8767 transitions. [2021-06-04 21:42:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:42:16,403 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:16,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:16,405 INFO L225 Difference]: With dead ends: 3431 [2021-06-04 21:42:16,406 INFO L226 Difference]: Without dead ends: 3161 [2021-06-04 21:42:16,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 565.2ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:42:16,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-06-04 21:42:16,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 2388. [2021-06-04 21:42:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.7452869710934227) internal successors, (6553), 2387 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6553 transitions. [2021-06-04 21:42:16,432 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6553 transitions. Word has length 105 [2021-06-04 21:42:16,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:16,432 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6553 transitions. [2021-06-04 21:42:16,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:16,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6553 transitions. [2021-06-04 21:42:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:16,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:16,434 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:16,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-04 21:42:16,634 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:16,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:16,634 INFO L82 PathProgramCache]: Analyzing trace with hash -547826485, now seen corresponding path program 102 times [2021-06-04 21:42:16,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:16,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919003050] [2021-06-04 21:42:16,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:16,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:16,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919003050] [2021-06-04 21:42:16,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919003050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:16,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847128157] [2021-06-04 21:42:16,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:16,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:42:16,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:16,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:16,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:17,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847128157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:17,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:17,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:17,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431924672] [2021-06-04 21:42:17,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:17,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:17,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:17,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:17,231 INFO L87 Difference]: Start difference. First operand 2388 states and 6553 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:17,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:17,772 INFO L93 Difference]: Finished difference Result 3801 states and 9582 transitions. [2021-06-04 21:42:17,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:17,772 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:17,776 INFO L225 Difference]: With dead ends: 3801 [2021-06-04 21:42:17,776 INFO L226 Difference]: Without dead ends: 3531 [2021-06-04 21:42:17,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 648.5ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:42:17,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2021-06-04 21:42:17,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 2463. [2021-06-04 21:42:17,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.753046303818034) internal successors, (6778), 2462 states have internal predecessors, (6778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6778 transitions. [2021-06-04 21:42:17,800 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6778 transitions. Word has length 105 [2021-06-04 21:42:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:17,800 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6778 transitions. [2021-06-04 21:42:17,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6778 transitions. [2021-06-04 21:42:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:17,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:17,802 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:18,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:18,002 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:18,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:18,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1939776583, now seen corresponding path program 103 times [2021-06-04 21:42:18,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:18,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814061321] [2021-06-04 21:42:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:18,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:18,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814061321] [2021-06-04 21:42:18,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814061321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:18,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014778640] [2021-06-04 21:42:18,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:18,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:18,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:18,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014778640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:18,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:18,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:18,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94780623] [2021-06-04 21:42:18,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:18,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:18,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:18,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:18,539 INFO L87 Difference]: Start difference. First operand 2463 states and 6778 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:19,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:19,070 INFO L93 Difference]: Finished difference Result 3831 states and 9717 transitions. [2021-06-04 21:42:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:42:19,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:19,074 INFO L225 Difference]: With dead ends: 3831 [2021-06-04 21:42:19,074 INFO L226 Difference]: Without dead ends: 3561 [2021-06-04 21:42:19,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 597.0ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:42:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-04 21:42:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2538. [2021-06-04 21:42:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2538 states, 2537 states have (on average 2.760346866377611) internal successors, (7003), 2537 states have internal predecessors, (7003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2538 states to 2538 states and 7003 transitions. [2021-06-04 21:42:19,098 INFO L78 Accepts]: Start accepts. Automaton has 2538 states and 7003 transitions. Word has length 105 [2021-06-04 21:42:19,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:19,099 INFO L482 AbstractCegarLoop]: Abstraction has 2538 states and 7003 transitions. [2021-06-04 21:42:19,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:19,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2538 states and 7003 transitions. [2021-06-04 21:42:19,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:19,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:19,100 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:19,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:19,301 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:19,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2110113417, now seen corresponding path program 104 times [2021-06-04 21:42:19,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:19,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186160408] [2021-06-04 21:42:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:19,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:19,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186160408] [2021-06-04 21:42:19,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186160408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:19,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439883470] [2021-06-04 21:42:19,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:19,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:19,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:19,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:19,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:19,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439883470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:19,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:19,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:19,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078041767] [2021-06-04 21:42:19,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:19,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:19,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:19,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:19,855 INFO L87 Difference]: Start difference. First operand 2538 states and 7003 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:20,485 INFO L93 Difference]: Finished difference Result 3856 states and 9842 transitions. [2021-06-04 21:42:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:42:20,485 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:20,489 INFO L225 Difference]: With dead ends: 3856 [2021-06-04 21:42:20,489 INFO L226 Difference]: Without dead ends: 3586 [2021-06-04 21:42:20,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 691.4ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-04 21:42:20,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 2613. [2021-06-04 21:42:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2612 states have (on average 2.767228177641654) internal successors, (7228), 2612 states have internal predecessors, (7228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 7228 transitions. [2021-06-04 21:42:20,515 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 7228 transitions. Word has length 105 [2021-06-04 21:42:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:20,515 INFO L482 AbstractCegarLoop]: Abstraction has 2613 states and 7228 transitions. [2021-06-04 21:42:20,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 7228 transitions. [2021-06-04 21:42:20,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:20,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:20,517 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:20,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-04 21:42:20,718 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:20,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:20,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1733263095, now seen corresponding path program 105 times [2021-06-04 21:42:20,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:20,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94654990] [2021-06-04 21:42:20,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:20,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:20,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94654990] [2021-06-04 21:42:20,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94654990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:20,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277980642] [2021-06-04 21:42:20,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:21,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:42:21,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:21,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:21,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:21,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277980642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:21,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:21,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:21,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605806167] [2021-06-04 21:42:21,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:21,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:21,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:21,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:21,250 INFO L87 Difference]: Start difference. First operand 2613 states and 7228 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:21,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:21,839 INFO L93 Difference]: Finished difference Result 3881 states and 9967 transitions. [2021-06-04 21:42:21,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:21,840 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:21,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:21,843 INFO L225 Difference]: With dead ends: 3881 [2021-06-04 21:42:21,843 INFO L226 Difference]: Without dead ends: 3611 [2021-06-04 21:42:21,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 613.3ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-06-04 21:42:21,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2688. [2021-06-04 21:42:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 2.773725344250093) internal successors, (7453), 2687 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 7453 transitions. [2021-06-04 21:42:21,870 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 7453 transitions. Word has length 105 [2021-06-04 21:42:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:21,870 INFO L482 AbstractCegarLoop]: Abstraction has 2688 states and 7453 transitions. [2021-06-04 21:42:21,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 7453 transitions. [2021-06-04 21:42:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:21,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:21,872 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:22,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-04 21:42:22,073 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1234948665, now seen corresponding path program 106 times [2021-06-04 21:42:22,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:22,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550762560] [2021-06-04 21:42:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:22,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:22,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550762560] [2021-06-04 21:42:22,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550762560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:22,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379890975] [2021-06-04 21:42:22,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:22,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:22,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:22,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:22,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:22,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379890975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:22,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:22,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:22,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135540716] [2021-06-04 21:42:22,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:22,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:22,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:22,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:22,616 INFO L87 Difference]: Start difference. First operand 2688 states and 7453 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:23,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:23,316 INFO L93 Difference]: Finished difference Result 3906 states and 10092 transitions. [2021-06-04 21:42:23,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:42:23,317 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:23,320 INFO L225 Difference]: With dead ends: 3906 [2021-06-04 21:42:23,320 INFO L226 Difference]: Without dead ends: 3636 [2021-06-04 21:42:23,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 739.9ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:42:23,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2021-06-04 21:42:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 2763. [2021-06-04 21:42:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2763 states, 2762 states have (on average 2.779869659666908) internal successors, (7678), 2762 states have internal predecessors, (7678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2763 states to 2763 states and 7678 transitions. [2021-06-04 21:42:23,348 INFO L78 Accepts]: Start accepts. Automaton has 2763 states and 7678 transitions. Word has length 105 [2021-06-04 21:42:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:23,348 INFO L482 AbstractCegarLoop]: Abstraction has 2763 states and 7678 transitions. [2021-06-04 21:42:23,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2763 states and 7678 transitions. [2021-06-04 21:42:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:23,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:23,350 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:23,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-04 21:42:23,551 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:23,551 INFO L82 PathProgramCache]: Analyzing trace with hash -780732491, now seen corresponding path program 107 times [2021-06-04 21:42:23,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:23,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693103543] [2021-06-04 21:42:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:23,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:23,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693103543] [2021-06-04 21:42:23,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693103543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:23,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484543617] [2021-06-04 21:42:23,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:23,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:42:23,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:23,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:24,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484543617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:24,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:24,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:24,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360990456] [2021-06-04 21:42:24,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:24,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:24,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:24,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:24,080 INFO L87 Difference]: Start difference. First operand 2763 states and 7678 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:24,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:24,709 INFO L93 Difference]: Finished difference Result 3931 states and 10217 transitions. [2021-06-04 21:42:24,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:42:24,709 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:24,713 INFO L225 Difference]: With dead ends: 3931 [2021-06-04 21:42:24,713 INFO L226 Difference]: Without dead ends: 3661 [2021-06-04 21:42:24,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 656.1ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:42:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-06-04 21:42:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2838. [2021-06-04 21:42:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2838 states, 2837 states have (on average 2.785689108212901) internal successors, (7903), 2837 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 7903 transitions. [2021-06-04 21:42:24,742 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 7903 transitions. Word has length 105 [2021-06-04 21:42:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:24,742 INFO L482 AbstractCegarLoop]: Abstraction has 2838 states and 7903 transitions. [2021-06-04 21:42:24,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 7903 transitions. [2021-06-04 21:42:24,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:24,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:24,744 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:24,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:24,945 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:24,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:24,946 INFO L82 PathProgramCache]: Analyzing trace with hash 218163845, now seen corresponding path program 108 times [2021-06-04 21:42:24,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:24,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355102780] [2021-06-04 21:42:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:25,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:25,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355102780] [2021-06-04 21:42:25,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355102780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:25,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813584808] [2021-06-04 21:42:25,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:25,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:42:25,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:25,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:25,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:25,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813584808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:25,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:25,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:25,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416252725] [2021-06-04 21:42:25,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:25,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:25,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:25,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:25,484 INFO L87 Difference]: Start difference. First operand 2838 states and 7903 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:26,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:26,269 INFO L93 Difference]: Finished difference Result 3956 states and 10342 transitions. [2021-06-04 21:42:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:42:26,269 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:26,273 INFO L225 Difference]: With dead ends: 3956 [2021-06-04 21:42:26,273 INFO L226 Difference]: Without dead ends: 3686 [2021-06-04 21:42:26,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 790.8ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:42:26,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2021-06-04 21:42:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 2913. [2021-06-04 21:42:26,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 2.791208791208791) internal successors, (8128), 2912 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 8128 transitions. [2021-06-04 21:42:26,304 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 8128 transitions. Word has length 105 [2021-06-04 21:42:26,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:26,304 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 8128 transitions. [2021-06-04 21:42:26,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 8128 transitions. [2021-06-04 21:42:26,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:26,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:26,306 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:26,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-04 21:42:26,507 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:26,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:26,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1661164045, now seen corresponding path program 109 times [2021-06-04 21:42:26,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:26,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117978576] [2021-06-04 21:42:26,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:26,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:26,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117978576] [2021-06-04 21:42:26,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117978576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:26,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901047215] [2021-06-04 21:42:26,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:26,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:26,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:27,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901047215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:27,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:27,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:27,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991800742] [2021-06-04 21:42:27,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:27,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:27,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:27,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:27,042 INFO L87 Difference]: Start difference. First operand 2913 states and 8128 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:27,737 INFO L93 Difference]: Finished difference Result 3981 states and 10467 transitions. [2021-06-04 21:42:27,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:42:27,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:27,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:27,742 INFO L225 Difference]: With dead ends: 3981 [2021-06-04 21:42:27,742 INFO L226 Difference]: Without dead ends: 3711 [2021-06-04 21:42:27,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 698.8ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:42:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2021-06-04 21:42:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 2988. [2021-06-04 21:42:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2988 states, 2987 states have (on average 2.7964512889186475) internal successors, (8353), 2987 states have internal predecessors, (8353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 8353 transitions. [2021-06-04 21:42:27,772 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 8353 transitions. Word has length 105 [2021-06-04 21:42:27,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:27,773 INFO L482 AbstractCegarLoop]: Abstraction has 2988 states and 8353 transitions. [2021-06-04 21:42:27,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:27,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 8353 transitions. [2021-06-04 21:42:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:27,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:27,775 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:27,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-04 21:42:27,975 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:27,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash 369155267, now seen corresponding path program 110 times [2021-06-04 21:42:27,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:27,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900381441] [2021-06-04 21:42:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:28,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:28,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900381441] [2021-06-04 21:42:28,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900381441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:28,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685751076] [2021-06-04 21:42:28,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:28,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:28,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:28,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:28,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:28,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685751076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:28,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:28,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:28,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734708819] [2021-06-04 21:42:28,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:28,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:28,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:28,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:28,495 INFO L87 Difference]: Start difference. First operand 2988 states and 8353 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:29,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:29,364 INFO L93 Difference]: Finished difference Result 4006 states and 10592 transitions. [2021-06-04 21:42:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:42:29,365 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:29,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:29,368 INFO L225 Difference]: With dead ends: 4006 [2021-06-04 21:42:29,368 INFO L226 Difference]: Without dead ends: 3736 [2021-06-04 21:42:29,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 854.4ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:42:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-06-04 21:42:29,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3063. [2021-06-04 21:42:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 2.8014369693011103) internal successors, (8578), 3062 states have internal predecessors, (8578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 8578 transitions. [2021-06-04 21:42:29,398 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 8578 transitions. Word has length 105 [2021-06-04 21:42:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:29,399 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 8578 transitions. [2021-06-04 21:42:29,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:29,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 8578 transitions. [2021-06-04 21:42:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:29,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:29,401 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:29,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-04 21:42:29,601 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:29,602 INFO L82 PathProgramCache]: Analyzing trace with hash 983394737, now seen corresponding path program 111 times [2021-06-04 21:42:29,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:29,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796242304] [2021-06-04 21:42:29,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:29,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:29,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796242304] [2021-06-04 21:42:29,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796242304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:29,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748711342] [2021-06-04 21:42:29,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:29,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:42:29,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:29,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:29,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:30,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748711342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:30,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:30,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:30,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493160784] [2021-06-04 21:42:30,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:30,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:30,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:30,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:30,092 INFO L87 Difference]: Start difference. First operand 3063 states and 8578 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:30,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:30,825 INFO L93 Difference]: Finished difference Result 4031 states and 10717 transitions. [2021-06-04 21:42:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:42:30,825 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:30,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:30,829 INFO L225 Difference]: With dead ends: 4031 [2021-06-04 21:42:30,829 INFO L226 Difference]: Without dead ends: 3761 [2021-06-04 21:42:30,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 714.0ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:42:30,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-04 21:42:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3138. [2021-06-04 21:42:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3137 states have (on average 2.8061842524705134) internal successors, (8803), 3137 states have internal predecessors, (8803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 8803 transitions. [2021-06-04 21:42:30,861 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 8803 transitions. Word has length 105 [2021-06-04 21:42:30,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:30,861 INFO L482 AbstractCegarLoop]: Abstraction has 3138 states and 8803 transitions. [2021-06-04 21:42:30,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 8803 transitions. [2021-06-04 21:42:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:30,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:30,864 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:31,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:31,069 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:31,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:31,069 INFO L82 PathProgramCache]: Analyzing trace with hash -731847551, now seen corresponding path program 112 times [2021-06-04 21:42:31,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:31,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230626554] [2021-06-04 21:42:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:31,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:31,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230626554] [2021-06-04 21:42:31,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230626554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:31,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119205404] [2021-06-04 21:42:31,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:31,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:31,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:31,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:31,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:31,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119205404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:31,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:31,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:31,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095112355] [2021-06-04 21:42:31,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:31,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:31,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:31,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:31,606 INFO L87 Difference]: Start difference. First operand 3138 states and 8803 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:32,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:32,537 INFO L93 Difference]: Finished difference Result 4116 states and 11007 transitions. [2021-06-04 21:42:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:42:32,537 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:32,540 INFO L225 Difference]: With dead ends: 4116 [2021-06-04 21:42:32,541 INFO L226 Difference]: Without dead ends: 3846 [2021-06-04 21:42:32,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 911.8ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:42:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3846 states. [2021-06-04 21:42:32,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3846 to 3213. [2021-06-04 21:42:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.816936488169365) internal successors, (9048), 3212 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 9048 transitions. [2021-06-04 21:42:32,573 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 9048 transitions. Word has length 105 [2021-06-04 21:42:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:32,573 INFO L482 AbstractCegarLoop]: Abstraction has 3213 states and 9048 transitions. [2021-06-04 21:42:32,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 9048 transitions. [2021-06-04 21:42:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:32,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:32,575 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:32,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:32,776 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:32,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1764495153, now seen corresponding path program 113 times [2021-06-04 21:42:32,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:32,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311816410] [2021-06-04 21:42:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:32,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:32,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311816410] [2021-06-04 21:42:32,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311816410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:32,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226672764] [2021-06-04 21:42:32,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:33,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:42:33,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:33,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:33,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:33,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226672764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:33,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:33,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:33,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735810763] [2021-06-04 21:42:33,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:33,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:33,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:33,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:33,257 INFO L87 Difference]: Start difference. First operand 3213 states and 9048 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:34,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:34,045 INFO L93 Difference]: Finished difference Result 4858 states and 13131 transitions. [2021-06-04 21:42:34,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:42:34,046 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:34,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:34,050 INFO L225 Difference]: With dead ends: 4858 [2021-06-04 21:42:34,050 INFO L226 Difference]: Without dead ends: 4588 [2021-06-04 21:42:34,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 748.2ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:42:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4588 states. [2021-06-04 21:42:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4588 to 3393. [2021-06-04 21:42:34,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 2.832252358490566) internal successors, (9607), 3392 states have internal predecessors, (9607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 9607 transitions. [2021-06-04 21:42:34,084 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 9607 transitions. Word has length 105 [2021-06-04 21:42:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:34,084 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 9607 transitions. [2021-06-04 21:42:34,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 9607 transitions. [2021-06-04 21:42:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:34,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:34,086 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:34,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:34,287 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:34,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:34,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1742151903, now seen corresponding path program 114 times [2021-06-04 21:42:34,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:34,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346932710] [2021-06-04 21:42:34,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:34,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:34,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346932710] [2021-06-04 21:42:34,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346932710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:34,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326831182] [2021-06-04 21:42:34,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:34,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:42:34,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:34,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:34,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326831182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:34,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:34,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:34,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692763820] [2021-06-04 21:42:34,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:34,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:34,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:34,795 INFO L87 Difference]: Start difference. First operand 3393 states and 9607 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:35,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:35,854 INFO L93 Difference]: Finished difference Result 4726 states and 12796 transitions. [2021-06-04 21:42:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:42:35,855 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:35,859 INFO L225 Difference]: With dead ends: 4726 [2021-06-04 21:42:35,859 INFO L226 Difference]: Without dead ends: 4151 [2021-06-04 21:42:35,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1033.0ms TimeCoverageRelationStatistics Valid=896, Invalid=2526, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:42:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-04 21:42:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3428. [2021-06-04 21:42:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.825503355704698) internal successors, (9683), 3427 states have internal predecessors, (9683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9683 transitions. [2021-06-04 21:42:35,897 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9683 transitions. Word has length 105 [2021-06-04 21:42:35,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:35,897 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9683 transitions. [2021-06-04 21:42:35,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:35,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9683 transitions. [2021-06-04 21:42:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:35,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:35,900 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:36,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-04 21:42:36,100 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1657780875, now seen corresponding path program 115 times [2021-06-04 21:42:36,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:36,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207090237] [2021-06-04 21:42:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:36,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:36,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207090237] [2021-06-04 21:42:36,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207090237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:36,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624275488] [2021-06-04 21:42:36,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:36,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:42:36,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:36,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624275488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:36,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:36,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-06-04 21:42:36,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625708075] [2021-06-04 21:42:36,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:42:36,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:36,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:42:36,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:42:36,730 INFO L87 Difference]: Start difference. First operand 3428 states and 9683 transitions. Second operand has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:37,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:37,347 INFO L93 Difference]: Finished difference Result 4468 states and 12083 transitions. [2021-06-04 21:42:37,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:37,348 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:37,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:37,352 INFO L225 Difference]: With dead ends: 4468 [2021-06-04 21:42:37,352 INFO L226 Difference]: Without dead ends: 4134 [2021-06-04 21:42:37,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 697.6ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:42:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2021-06-04 21:42:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 3513. [2021-06-04 21:42:37,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.805523917995444) internal successors, (9853), 3512 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9853 transitions. [2021-06-04 21:42:37,387 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9853 transitions. Word has length 110 [2021-06-04 21:42:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:37,387 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9853 transitions. [2021-06-04 21:42:37,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9853 transitions. [2021-06-04 21:42:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:37,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:37,390 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:37,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-04 21:42:37,591 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:37,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1067386545, now seen corresponding path program 116 times [2021-06-04 21:42:37,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:37,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329417260] [2021-06-04 21:42:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:37,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:37,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329417260] [2021-06-04 21:42:37,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329417260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:37,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709565736] [2021-06-04 21:42:37,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:37,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:37,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:37,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:38,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709565736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:38,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:38,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:42:38,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937410288] [2021-06-04 21:42:38,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:38,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:38,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:38,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:38,192 INFO L87 Difference]: Start difference. First operand 3513 states and 9853 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:38,672 INFO L93 Difference]: Finished difference Result 5061 states and 13077 transitions. [2021-06-04 21:42:38,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:42:38,672 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:38,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:38,677 INFO L225 Difference]: With dead ends: 5061 [2021-06-04 21:42:38,677 INFO L226 Difference]: Without dead ends: 4791 [2021-06-04 21:42:38,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 564.9ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:42:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-06-04 21:42:38,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 3528. [2021-06-04 21:42:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-04 21:42:38,712 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-04 21:42:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:38,712 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-04 21:42:38,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:38,712 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-04 21:42:38,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:38,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:38,715 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:38,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-04 21:42:38,915 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:38,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1447830497, now seen corresponding path program 117 times [2021-06-04 21:42:38,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:38,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706630302] [2021-06-04 21:42:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:39,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:39,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706630302] [2021-06-04 21:42:39,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706630302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:39,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292207910] [2021-06-04 21:42:39,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:39,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:42:39,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:39,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:39,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:39,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292207910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:39,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:39,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:42:39,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437763052] [2021-06-04 21:42:39,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:42:39,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:39,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:42:39,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:42:39,555 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:40,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:40,122 INFO L93 Difference]: Finished difference Result 4946 states and 12847 transitions. [2021-06-04 21:42:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:40,122 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:40,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:40,126 INFO L225 Difference]: With dead ends: 4946 [2021-06-04 21:42:40,126 INFO L226 Difference]: Without dead ends: 4676 [2021-06-04 21:42:40,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 695.2ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:42:40,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2021-06-04 21:42:40,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 3528. [2021-06-04 21:42:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-04 21:42:40,180 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-04 21:42:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:40,180 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-04 21:42:40,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:40,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-04 21:42:40,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:40,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:40,183 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:40,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-04 21:42:40,384 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:40,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:40,384 INFO L82 PathProgramCache]: Analyzing trace with hash -823455347, now seen corresponding path program 118 times [2021-06-04 21:42:40,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:40,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542236031] [2021-06-04 21:42:40,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:40,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:40,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542236031] [2021-06-04 21:42:40,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542236031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:40,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731144879] [2021-06-04 21:42:40,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:40,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:40,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:40,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:40,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:40,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731144879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:40,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:40,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:42:40,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12989404] [2021-06-04 21:42:40,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:40,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:40,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:40,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:40,955 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:41,500 INFO L93 Difference]: Finished difference Result 4921 states and 12797 transitions. [2021-06-04 21:42:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:42:41,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:41,505 INFO L225 Difference]: With dead ends: 4921 [2021-06-04 21:42:41,505 INFO L226 Difference]: Without dead ends: 4651 [2021-06-04 21:42:41,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 596.0ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:42:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2021-06-04 21:42:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 3528. [2021-06-04 21:42:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:41,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-04 21:42:41,537 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-04 21:42:41,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:41,537 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-04 21:42:41,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:41,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-04 21:42:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:41,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:41,540 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:41,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-04 21:42:41,742 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:41,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:41,742 INFO L82 PathProgramCache]: Analyzing trace with hash -14403491, now seen corresponding path program 119 times [2021-06-04 21:42:41,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:41,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815563128] [2021-06-04 21:42:41,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:42,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:42,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815563128] [2021-06-04 21:42:42,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815563128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:42,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524223961] [2021-06-04 21:42:42,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:42,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:42:42,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:42,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:42,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:42,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524223961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:42,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:42,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:42:42,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614283283] [2021-06-04 21:42:42,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:42:42,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:42,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:42:42,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:42:42,361 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:43,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:43,038 INFO L93 Difference]: Finished difference Result 4871 states and 12697 transitions. [2021-06-04 21:42:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:42:43,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:43,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:43,042 INFO L225 Difference]: With dead ends: 4871 [2021-06-04 21:42:43,042 INFO L226 Difference]: Without dead ends: 4601 [2021-06-04 21:42:43,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 742.5ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:42:43,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-06-04 21:42:43,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3528. [2021-06-04 21:42:43,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:43,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-04 21:42:43,075 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-04 21:42:43,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:43,075 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-04 21:42:43,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:43,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-04 21:42:43,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:43,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:43,078 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:43,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:43,280 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:43,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:43,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1406353589, now seen corresponding path program 120 times [2021-06-04 21:42:43,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:43,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979858814] [2021-06-04 21:42:43,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:43,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:43,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979858814] [2021-06-04 21:42:43,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979858814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:43,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406814622] [2021-06-04 21:42:43,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:43,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:42:43,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:43,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:43,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:43,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406814622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:43,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:43,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:42:43,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874619511] [2021-06-04 21:42:43,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:43,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:43,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:43,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:43,848 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:44,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:44,411 INFO L93 Difference]: Finished difference Result 4821 states and 12597 transitions. [2021-06-04 21:42:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:42:44,411 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:44,416 INFO L225 Difference]: With dead ends: 4821 [2021-06-04 21:42:44,416 INFO L226 Difference]: Without dead ends: 4551 [2021-06-04 21:42:44,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 624.3ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:42:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-06-04 21:42:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3528. [2021-06-04 21:42:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:44,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-04 21:42:44,448 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-04 21:42:44,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:44,449 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-04 21:42:44,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:44,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-04 21:42:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:44,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:44,451 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:44,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-04 21:42:44,652 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:44,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:44,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1651430885, now seen corresponding path program 121 times [2021-06-04 21:42:44,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:44,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129967102] [2021-06-04 21:42:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:44,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:44,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129967102] [2021-06-04 21:42:44,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129967102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:44,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858651272] [2021-06-04 21:42:44,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:44,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:44,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:45,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858651272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:45,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:45,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:42:45,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7781667] [2021-06-04 21:42:45,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:42:45,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:45,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:42:45,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:42:45,230 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:45,973 INFO L93 Difference]: Finished difference Result 4771 states and 12497 transitions. [2021-06-04 21:42:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:42:45,973 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:45,977 INFO L225 Difference]: With dead ends: 4771 [2021-06-04 21:42:45,977 INFO L226 Difference]: Without dead ends: 4501 [2021-06-04 21:42:45,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 791.5ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:42:45,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4501 states. [2021-06-04 21:42:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4501 to 3528. [2021-06-04 21:42:46,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-04 21:42:46,009 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-04 21:42:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:46,009 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-04 21:42:46,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-04 21:42:46,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:46,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:46,013 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:46,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-04 21:42:46,235 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:46,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:46,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2028281207, now seen corresponding path program 122 times [2021-06-04 21:42:46,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:46,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579305162] [2021-06-04 21:42:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:46,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:46,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579305162] [2021-06-04 21:42:46,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579305162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:46,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762355319] [2021-06-04 21:42:46,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:46,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:46,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:46,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:46,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:46,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762355319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:46,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:46,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:42:46,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775901845] [2021-06-04 21:42:46,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:46,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:46,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:46,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:46,790 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:47,423 INFO L93 Difference]: Finished difference Result 4721 states and 12397 transitions. [2021-06-04 21:42:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:47,423 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:47,428 INFO L225 Difference]: With dead ends: 4721 [2021-06-04 21:42:47,428 INFO L226 Difference]: Without dead ends: 4451 [2021-06-04 21:42:47,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 668.2ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:42:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-04 21:42:47,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3528. [2021-06-04 21:42:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-04 21:42:47,463 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-04 21:42:47,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:47,463 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-04 21:42:47,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-04 21:42:47,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:47,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:47,466 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:47,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:47,669 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:47,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:47,669 INFO L82 PathProgramCache]: Analyzing trace with hash -701525671, now seen corresponding path program 123 times [2021-06-04 21:42:47,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:47,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739261455] [2021-06-04 21:42:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:47,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:47,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739261455] [2021-06-04 21:42:47,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739261455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:47,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715240174] [2021-06-04 21:42:47,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:47,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:42:47,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:47,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:48,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:48,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715240174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:48,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:48,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:42:48,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822443474] [2021-06-04 21:42:48,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:42:48,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:48,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:42:48,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:42:48,240 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:49,048 INFO L93 Difference]: Finished difference Result 4671 states and 12297 transitions. [2021-06-04 21:42:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:42:49,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:49,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:49,053 INFO L225 Difference]: With dead ends: 4671 [2021-06-04 21:42:49,053 INFO L226 Difference]: Without dead ends: 4401 [2021-06-04 21:42:49,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 844.4ms TimeCoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:42:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-04 21:42:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3528. [2021-06-04 21:42:49,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-04 21:42:49,085 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-04 21:42:49,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:49,086 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-04 21:42:49,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:49,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-04 21:42:49,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:49,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:49,088 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:49,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:49,289 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:49,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:49,289 INFO L82 PathProgramCache]: Analyzing trace with hash -247309497, now seen corresponding path program 124 times [2021-06-04 21:42:49,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:49,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908703104] [2021-06-04 21:42:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:49,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:49,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908703104] [2021-06-04 21:42:49,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908703104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:49,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367710795] [2021-06-04 21:42:49,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:49,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:49,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:49,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:49,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:49,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367710795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:49,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:49,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:42:49,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828718483] [2021-06-04 21:42:49,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:49,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:49,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:49,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:49,820 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:50,491 INFO L93 Difference]: Finished difference Result 4621 states and 12197 transitions. [2021-06-04 21:42:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:42:50,491 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:50,496 INFO L225 Difference]: With dead ends: 4621 [2021-06-04 21:42:50,496 INFO L226 Difference]: Without dead ends: 4351 [2021-06-04 21:42:50,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 696.6ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:42:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-04 21:42:50,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3528. [2021-06-04 21:42:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-04 21:42:50,528 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-04 21:42:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:50,528 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-04 21:42:50,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-04 21:42:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:50,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:50,531 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:50,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:50,732 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:50,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:50,732 INFO L82 PathProgramCache]: Analyzing trace with hash 751586839, now seen corresponding path program 125 times [2021-06-04 21:42:50,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:50,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962607464] [2021-06-04 21:42:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:50,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:50,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962607464] [2021-06-04 21:42:50,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962607464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:50,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491676787] [2021-06-04 21:42:50,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:51,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:42:51,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:51,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:51,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:51,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491676787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:51,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:51,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:42:51,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036249657] [2021-06-04 21:42:51,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:42:51,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:51,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:42:51,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:42:51,312 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:52,203 INFO L93 Difference]: Finished difference Result 4571 states and 12097 transitions. [2021-06-04 21:42:52,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:42:52,203 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:52,208 INFO L225 Difference]: With dead ends: 4571 [2021-06-04 21:42:52,208 INFO L226 Difference]: Without dead ends: 4301 [2021-06-04 21:42:52,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 891.5ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:42:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-04 21:42:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3528. [2021-06-04 21:42:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-04 21:42:52,239 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-04 21:42:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:52,240 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-04 21:42:52,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-04 21:42:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:52,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:52,242 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:52,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-04 21:42:52,443 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:52,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:52,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1127741051, now seen corresponding path program 126 times [2021-06-04 21:42:52,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:52,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736308184] [2021-06-04 21:42:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:52,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:52,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736308184] [2021-06-04 21:42:52,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736308184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:52,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672421795] [2021-06-04 21:42:52,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:52,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:42:52,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:52,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:52,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:53,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672421795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:53,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:53,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:42:53,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555451466] [2021-06-04 21:42:53,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:53,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:53,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:53,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:53,009 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:53,736 INFO L93 Difference]: Finished difference Result 4521 states and 11997 transitions. [2021-06-04 21:42:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:42:53,736 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:53,741 INFO L225 Difference]: With dead ends: 4521 [2021-06-04 21:42:53,741 INFO L226 Difference]: Without dead ends: 4251 [2021-06-04 21:42:53,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 751.8ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:42:53,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-04 21:42:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3528. [2021-06-04 21:42:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-04 21:42:53,795 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-04 21:42:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:53,796 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-04 21:42:53,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-04 21:42:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:53,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:53,798 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:54,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-04 21:42:54,001 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash 902578261, now seen corresponding path program 127 times [2021-06-04 21:42:54,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:54,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281720943] [2021-06-04 21:42:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:54,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:54,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281720943] [2021-06-04 21:42:54,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281720943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:54,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549546706] [2021-06-04 21:42:54,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:54,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:54,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:54,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549546706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:54,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:54,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:42:54,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648645155] [2021-06-04 21:42:54,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:42:54,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:54,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:42:54,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:42:54,545 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:55,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:55,497 INFO L93 Difference]: Finished difference Result 4471 states and 11897 transitions. [2021-06-04 21:42:55,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:42:55,498 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:55,503 INFO L225 Difference]: With dead ends: 4471 [2021-06-04 21:42:55,503 INFO L226 Difference]: Without dead ends: 4201 [2021-06-04 21:42:55,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 955.5ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:42:55,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-04 21:42:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3528. [2021-06-04 21:42:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-04 21:42:55,538 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-04 21:42:55,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:55,538 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-04 21:42:55,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-04 21:42:55,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:55,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:55,541 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:55,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:55,741 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:55,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1516817731, now seen corresponding path program 128 times [2021-06-04 21:42:55,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:55,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225518902] [2021-06-04 21:42:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:55,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:55,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225518902] [2021-06-04 21:42:55,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225518902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:55,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536658505] [2021-06-04 21:42:55,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:56,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:56,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:56,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:56,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:56,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536658505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:56,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:56,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:42:56,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700909828] [2021-06-04 21:42:56,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:56,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:56,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:56,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:56,275 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:57,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:57,062 INFO L93 Difference]: Finished difference Result 4421 states and 11797 transitions. [2021-06-04 21:42:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:42:57,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:57,066 INFO L225 Difference]: With dead ends: 4421 [2021-06-04 21:42:57,066 INFO L226 Difference]: Without dead ends: 4151 [2021-06-04 21:42:57,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 806.6ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:42:57,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-04 21:42:57,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3528. [2021-06-04 21:42:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-04 21:42:57,096 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-04 21:42:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:57,097 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-04 21:42:57,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-04 21:42:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:57,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:57,099 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:57,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-04 21:42:57,300 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:57,300 INFO L82 PathProgramCache]: Analyzing trace with hash -198424557, now seen corresponding path program 129 times [2021-06-04 21:42:57,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:57,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829249803] [2021-06-04 21:42:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:57,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:57,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829249803] [2021-06-04 21:42:57,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829249803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:57,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239274443] [2021-06-04 21:42:57,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:57,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:42:57,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:57,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:57,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239274443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:57,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:57,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:42:57,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223016401] [2021-06-04 21:42:57,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:42:57,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:57,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:42:57,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:42:57,842 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:58,871 INFO L93 Difference]: Finished difference Result 4431 states and 11847 transitions. [2021-06-04 21:42:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:42:58,871 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:58,875 INFO L225 Difference]: With dead ends: 4431 [2021-06-04 21:42:58,875 INFO L226 Difference]: Without dead ends: 4161 [2021-06-04 21:42:58,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1014.5ms TimeCoverageRelationStatistics Valid=843, Invalid=2349, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:42:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4161 states. [2021-06-04 21:42:58,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4161 to 3528. [2021-06-04 21:42:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8035157357527645) internal successors, (9888), 3527 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-06-04 21:42:58,908 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-06-04 21:42:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:58,908 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-06-04 21:42:58,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-06-04 21:42:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:58,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:58,910 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:59,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-04 21:42:59,117 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:59,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1231072159, now seen corresponding path program 130 times [2021-06-04 21:42:59,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:59,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033331867] [2021-06-04 21:42:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:59,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:59,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033331867] [2021-06-04 21:42:59,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033331867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:59,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006360945] [2021-06-04 21:42:59,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:59,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:59,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:59,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:59,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006360945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:59,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:59,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:42:59,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399267758] [2021-06-04 21:42:59,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:59,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:59,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:59,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:59,648 INFO L87 Difference]: Start difference. First operand 3528 states and 9888 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:00,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:00,494 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-06-04 21:43:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:43:00,495 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:00,499 INFO L225 Difference]: With dead ends: 5198 [2021-06-04 21:43:00,499 INFO L226 Difference]: Without dead ends: 4928 [2021-06-04 21:43:00,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 821.3ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:43:00,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-06-04 21:43:00,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-06-04 21:43:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 2.8181818181818183) internal successors, (10447), 3707 states have internal predecessors, (10447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-06-04 21:43:00,535 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-06-04 21:43:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:00,535 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-06-04 21:43:00,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-06-04 21:43:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:00,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:00,538 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:00,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-04 21:43:00,739 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:00,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:00,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1208728909, now seen corresponding path program 131 times [2021-06-04 21:43:00,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:00,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361362260] [2021-06-04 21:43:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:00,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:00,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361362260] [2021-06-04 21:43:00,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361362260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:00,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647033272] [2021-06-04 21:43:00,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:01,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:43:01,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:01,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:01,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:01,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647033272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:01,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:01,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:01,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284221992] [2021-06-04 21:43:01,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:01,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:01,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:01,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:01,370 INFO L87 Difference]: Start difference. First operand 3708 states and 10447 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:02,562 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-06-04 21:43:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:43:02,562 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:02,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:02,566 INFO L225 Difference]: With dead ends: 5021 [2021-06-04 21:43:02,566 INFO L226 Difference]: Without dead ends: 4446 [2021-06-04 21:43:02,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1186.4ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:43:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-06-04 21:43:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-06-04 21:43:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.735588009223674) internal successors, (7118), 2602 states have internal predecessors, (7118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-06-04 21:43:02,593 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-06-04 21:43:02,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:02,593 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-06-04 21:43:02,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-06-04 21:43:02,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:02,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:02,595 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:02,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:02,796 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:02,796 INFO L82 PathProgramCache]: Analyzing trace with hash -207372468, now seen corresponding path program 132 times [2021-06-04 21:43:02,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:02,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244123382] [2021-06-04 21:43:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:03,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:03,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244123382] [2021-06-04 21:43:03,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244123382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:03,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442513121] [2021-06-04 21:43:03,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:03,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:43:03,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:03,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:03,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:03,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442513121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:03,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:03,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:03,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366656840] [2021-06-04 21:43:03,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:03,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:03,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:03,402 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:03,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:03,956 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-06-04 21:43:03,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:43:03,957 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:03,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:03,960 INFO L225 Difference]: With dead ends: 3821 [2021-06-04 21:43:03,960 INFO L226 Difference]: Without dead ends: 3551 [2021-06-04 21:43:03,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 628.3ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:43:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-06-04 21:43:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-06-04 21:43:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.742995890922675) internal successors, (7343), 2677 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-06-04 21:43:03,986 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-06-04 21:43:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:03,986 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-06-04 21:43:03,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-06-04 21:43:03,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:03,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:03,988 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:04,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:04,189 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:04,189 INFO L82 PathProgramCache]: Analyzing trace with hash -587816420, now seen corresponding path program 133 times [2021-06-04 21:43:04,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:04,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460605585] [2021-06-04 21:43:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:04,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:04,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460605585] [2021-06-04 21:43:04,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460605585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:04,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531227326] [2021-06-04 21:43:04,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:04,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:04,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:04,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531227326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:04,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:04,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:04,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739620893] [2021-06-04 21:43:04,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:04,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:04,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:04,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:04,816 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:05,422 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-06-04 21:43:05,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:43:05,423 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:05,426 INFO L225 Difference]: With dead ends: 4241 [2021-06-04 21:43:05,426 INFO L226 Difference]: Without dead ends: 3971 [2021-06-04 21:43:05,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 710.8ms TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:43:05,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-04 21:43:05,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-06-04 21:43:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.75) internal successors, (7568), 2752 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-06-04 21:43:05,454 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-06-04 21:43:05,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:05,454 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-06-04 21:43:05,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:05,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-06-04 21:43:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:05,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:05,456 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:05,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:05,657 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:05,657 INFO L82 PathProgramCache]: Analyzing trace with hash 36558730, now seen corresponding path program 134 times [2021-06-04 21:43:05,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:05,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978530936] [2021-06-04 21:43:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:05,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:05,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978530936] [2021-06-04 21:43:05,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978530936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:05,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553543785] [2021-06-04 21:43:05,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:06,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:06,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:06,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:06,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:06,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553543785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:06,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:06,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:06,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27460833] [2021-06-04 21:43:06,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:06,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:06,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:06,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:06,224 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:06,811 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-06-04 21:43:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:43:06,811 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:06,815 INFO L225 Difference]: With dead ends: 4271 [2021-06-04 21:43:06,815 INFO L226 Difference]: Without dead ends: 4001 [2021-06-04 21:43:06,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 657.4ms TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:43:06,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-04 21:43:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-06-04 21:43:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.75663247258578) internal successors, (7793), 2827 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-06-04 21:43:06,845 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-06-04 21:43:06,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:06,845 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-06-04 21:43:06,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:06,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-06-04 21:43:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:06,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:06,847 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:07,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-04 21:43:07,048 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:07,048 INFO L82 PathProgramCache]: Analyzing trace with hash 845610586, now seen corresponding path program 135 times [2021-06-04 21:43:07,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:07,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168845072] [2021-06-04 21:43:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:07,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:07,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168845072] [2021-06-04 21:43:07,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168845072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:07,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460817189] [2021-06-04 21:43:07,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:07,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:07,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:07,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:07,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:07,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460817189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:07,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:07,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:07,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340027064] [2021-06-04 21:43:07,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:07,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:07,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:07,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:07,650 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:08,357 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-06-04 21:43:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:43:08,357 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:08,361 INFO L225 Difference]: With dead ends: 4296 [2021-06-04 21:43:08,361 INFO L226 Difference]: Without dead ends: 4026 [2021-06-04 21:43:08,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 778.6ms TimeCoverageRelationStatistics Valid=553, Invalid=1799, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:43:08,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-04 21:43:08,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-06-04 21:43:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7629221226740177) internal successors, (8018), 2902 states have internal predecessors, (8018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-06-04 21:43:08,390 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-06-04 21:43:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:08,390 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-06-04 21:43:08,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-06-04 21:43:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:08,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:08,392 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:08,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:08,592 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:08,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:08,593 INFO L82 PathProgramCache]: Analyzing trace with hash -546339512, now seen corresponding path program 136 times [2021-06-04 21:43:08,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:08,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294853260] [2021-06-04 21:43:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:08,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:08,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294853260] [2021-06-04 21:43:08,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294853260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:08,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571262183] [2021-06-04 21:43:08,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:08,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:08,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:08,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:08,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:09,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571262183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:09,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:09,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:09,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492156399] [2021-06-04 21:43:09,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:09,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:09,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:09,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:09,151 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:09,798 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-06-04 21:43:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:43:09,799 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:09,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:09,802 INFO L225 Difference]: With dead ends: 4321 [2021-06-04 21:43:09,802 INFO L226 Difference]: Without dead ends: 4051 [2021-06-04 21:43:09,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 691.6ms TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:43:09,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-04 21:43:09,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-06-04 21:43:09,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7688948605979173) internal successors, (8243), 2977 states have internal predecessors, (8243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-06-04 21:43:09,831 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-06-04 21:43:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:09,831 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-06-04 21:43:09,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-06-04 21:43:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:09,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:09,834 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:10,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-04 21:43:10,034 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:10,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:10,034 INFO L82 PathProgramCache]: Analyzing trace with hash -791416808, now seen corresponding path program 137 times [2021-06-04 21:43:10,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:10,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133105273] [2021-06-04 21:43:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:10,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:10,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133105273] [2021-06-04 21:43:10,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133105273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:10,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260772991] [2021-06-04 21:43:10,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:10,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:43:10,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:10,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:10,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:10,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260772991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:10,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:10,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:10,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573526395] [2021-06-04 21:43:10,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:10,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:10,645 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:11,444 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-06-04 21:43:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:43:11,445 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:11,449 INFO L225 Difference]: With dead ends: 4346 [2021-06-04 21:43:11,449 INFO L226 Difference]: Without dead ends: 4076 [2021-06-04 21:43:11,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 836.3ms TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:43:11,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-04 21:43:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-06-04 21:43:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.7745740498034075) internal successors, (8468), 3052 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-06-04 21:43:11,479 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-06-04 21:43:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:11,479 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-06-04 21:43:11,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:11,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-06-04 21:43:11,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:11,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:11,482 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:11,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:11,697 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:11,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1168267130, now seen corresponding path program 138 times [2021-06-04 21:43:11,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:11,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789975628] [2021-06-04 21:43:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:11,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:11,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789975628] [2021-06-04 21:43:11,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789975628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:11,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133778742] [2021-06-04 21:43:11,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:12,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:43:12,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:12,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:12,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133778742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:12,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:12,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:12,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542337030] [2021-06-04 21:43:12,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:12,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:12,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:12,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:12,245 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:12,950 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-06-04 21:43:12,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:43:12,950 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:12,954 INFO L225 Difference]: With dead ends: 4371 [2021-06-04 21:43:12,955 INFO L226 Difference]: Without dead ends: 4101 [2021-06-04 21:43:12,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 726.7ms TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:43:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-06-04 21:43:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-06-04 21:43:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7799808122801406) internal successors, (8693), 3127 states have internal predecessors, (8693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-06-04 21:43:12,990 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-06-04 21:43:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:12,990 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-06-04 21:43:12,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-06-04 21:43:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:12,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:12,992 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:13,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-04 21:43:13,193 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:13,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:13,193 INFO L82 PathProgramCache]: Analyzing trace with hash 158488406, now seen corresponding path program 139 times [2021-06-04 21:43:13,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:13,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996601108] [2021-06-04 21:43:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:13,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:13,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996601108] [2021-06-04 21:43:13,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996601108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:13,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185052141] [2021-06-04 21:43:13,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:13,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:13,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:13,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185052141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:13,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:13,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:13,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823251596] [2021-06-04 21:43:13,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:13,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:13,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:13,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:13,785 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:14,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:14,644 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-06-04 21:43:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:43:14,645 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:14,649 INFO L225 Difference]: With dead ends: 4396 [2021-06-04 21:43:14,649 INFO L226 Difference]: Without dead ends: 4126 [2021-06-04 21:43:14,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 895.6ms TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:43:14,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-04 21:43:14,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-06-04 21:43:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7851342910680823) internal successors, (8918), 3202 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-06-04 21:43:14,681 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-06-04 21:43:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:14,681 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-06-04 21:43:14,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-06-04 21:43:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:14,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:14,684 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:14,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-04 21:43:14,884 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:14,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:14,884 INFO L82 PathProgramCache]: Analyzing trace with hash 612704580, now seen corresponding path program 140 times [2021-06-04 21:43:14,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:14,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147198158] [2021-06-04 21:43:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:15,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:15,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147198158] [2021-06-04 21:43:15,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147198158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:15,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510563425] [2021-06-04 21:43:15,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:15,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:15,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:15,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:15,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:15,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510563425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:15,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:15,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:15,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200929944] [2021-06-04 21:43:15,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:15,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:15,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:15,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:15,435 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:16,196 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-06-04 21:43:16,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:43:16,197 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:16,200 INFO L225 Difference]: With dead ends: 4421 [2021-06-04 21:43:16,200 INFO L226 Difference]: Without dead ends: 4151 [2021-06-04 21:43:16,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 769.4ms TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:43:16,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-04 21:43:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-06-04 21:43:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.790051876716509) internal successors, (9143), 3277 states have internal predecessors, (9143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-06-04 21:43:16,232 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-06-04 21:43:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:16,232 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-06-04 21:43:16,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-06-04 21:43:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:16,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:16,235 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:16,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:16,437 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:16,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1611600916, now seen corresponding path program 141 times [2021-06-04 21:43:16,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:16,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201524838] [2021-06-04 21:43:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:16,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:16,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201524838] [2021-06-04 21:43:16,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201524838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:16,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748369662] [2021-06-04 21:43:16,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:16,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:16,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:16,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:16,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:17,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748369662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:17,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:17,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:17,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497984563] [2021-06-04 21:43:17,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:17,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:17,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:17,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:17,013 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:17,942 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-06-04 21:43:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:43:17,943 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:17,947 INFO L225 Difference]: With dead ends: 4446 [2021-06-04 21:43:17,947 INFO L226 Difference]: Without dead ends: 4176 [2021-06-04 21:43:17,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 928.4ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:43:17,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-04 21:43:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-06-04 21:43:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7947494033412887) internal successors, (9368), 3352 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-06-04 21:43:17,981 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-06-04 21:43:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:17,981 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-06-04 21:43:17,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:17,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-06-04 21:43:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:17,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:17,983 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:18,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-04 21:43:18,185 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:18,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:18,185 INFO L82 PathProgramCache]: Analyzing trace with hash -267726974, now seen corresponding path program 142 times [2021-06-04 21:43:18,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:18,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893928422] [2021-06-04 21:43:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:18,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:18,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893928422] [2021-06-04 21:43:18,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893928422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:18,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999014511] [2021-06-04 21:43:18,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:18,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:18,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:18,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:18,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:18,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999014511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:18,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:18,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:18,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120499947] [2021-06-04 21:43:18,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:18,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:18,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:18,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:18,758 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:19,573 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-06-04 21:43:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:43:19,573 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:19,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:19,577 INFO L225 Difference]: With dead ends: 4471 [2021-06-04 21:43:19,577 INFO L226 Difference]: Without dead ends: 4201 [2021-06-04 21:43:19,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 829.4ms TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:43:19,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-04 21:43:19,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-06-04 21:43:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7992413189378467) internal successors, (9593), 3427 states have internal predecessors, (9593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-06-04 21:43:19,611 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-06-04 21:43:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:19,611 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-06-04 21:43:19,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-06-04 21:43:19,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:19,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:19,614 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:19,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:19,815 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:19,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:19,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1762592338, now seen corresponding path program 143 times [2021-06-04 21:43:19,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:19,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267773162] [2021-06-04 21:43:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:20,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:20,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267773162] [2021-06-04 21:43:20,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267773162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:20,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175803572] [2021-06-04 21:43:20,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:20,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:43:20,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:20,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:20,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:20,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175803572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:20,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:20,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:20,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500149733] [2021-06-04 21:43:20,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:20,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:20,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:20,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:20,376 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:21,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:21,375 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-06-04 21:43:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:43:21,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:21,379 INFO L225 Difference]: With dead ends: 4496 [2021-06-04 21:43:21,379 INFO L226 Difference]: Without dead ends: 4226 [2021-06-04 21:43:21,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 984.0ms TimeCoverageRelationStatistics Valid=809, Invalid=2383, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:43:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-04 21:43:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-06-04 21:43:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.803540833809252) internal successors, (9818), 3502 states have internal predecessors, (9818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-06-04 21:43:21,414 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-06-04 21:43:21,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:21,414 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-06-04 21:43:21,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:21,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-06-04 21:43:21,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:21,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:21,417 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:21,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:21,617 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1918135488, now seen corresponding path program 144 times [2021-06-04 21:43:21,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:21,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205218824] [2021-06-04 21:43:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:21,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:21,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205218824] [2021-06-04 21:43:21,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205218824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:21,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883422189] [2021-06-04 21:43:21,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:21,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:43:21,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:21,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:21,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:22,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883422189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:22,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:22,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:22,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341212747] [2021-06-04 21:43:22,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:22,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:22,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:22,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:22,164 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:23,011 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-06-04 21:43:23,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:43:23,012 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:23,016 INFO L225 Difference]: With dead ends: 4566 [2021-06-04 21:43:23,016 INFO L226 Difference]: Without dead ends: 4296 [2021-06-04 21:43:23,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 832.0ms TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:43:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-06-04 21:43:23,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-06-04 21:43:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.8118535085266982) internal successors, (10058), 3577 states have internal predecessors, (10058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-06-04 21:43:23,052 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-06-04 21:43:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:23,052 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-06-04 21:43:23,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-06-04 21:43:23,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:23,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:23,055 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:23,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:23,255 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:23,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:23,255 INFO L82 PathProgramCache]: Analyzing trace with hash 661589520, now seen corresponding path program 145 times [2021-06-04 21:43:23,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:23,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677449855] [2021-06-04 21:43:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:23,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:23,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677449855] [2021-06-04 21:43:23,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677449855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:23,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445991087] [2021-06-04 21:43:23,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:23,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:23,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:23,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445991087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:23,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:23,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:23,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235787776] [2021-06-04 21:43:23,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:23,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:23,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:23,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:23,800 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:24,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:24,951 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-06-04 21:43:24,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:43:24,952 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:24,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:24,956 INFO L225 Difference]: With dead ends: 5144 [2021-06-04 21:43:24,956 INFO L226 Difference]: Without dead ends: 4521 [2021-06-04 21:43:24,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1098.9ms TimeCoverageRelationStatistics Valid=934, Invalid=2726, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:43:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-04 21:43:24,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-06-04 21:43:24,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.8170865279299013) internal successors, (10288), 3652 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-06-04 21:43:24,989 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-06-04 21:43:24,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:24,990 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-06-04 21:43:24,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-06-04 21:43:24,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:24,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:24,992 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:25,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:25,193 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:25,193 INFO L82 PathProgramCache]: Analyzing trace with hash -371058082, now seen corresponding path program 146 times [2021-06-04 21:43:25,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:25,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624170153] [2021-06-04 21:43:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:25,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:25,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624170153] [2021-06-04 21:43:25,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624170153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:25,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855590535] [2021-06-04 21:43:25,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:25,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:25,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:25,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:25,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:25,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855590535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:25,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:25,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:25,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821403630] [2021-06-04 21:43:25,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:25,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:25,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:25,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:25,734 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:26,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:26,669 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-06-04 21:43:26,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:43:26,670 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:26,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:26,675 INFO L225 Difference]: With dead ends: 5348 [2021-06-04 21:43:26,675 INFO L226 Difference]: Without dead ends: 5078 [2021-06-04 21:43:26,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 898.0ms TimeCoverageRelationStatistics Valid=1000, Invalid=2422, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:43:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-06-04 21:43:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-06-04 21:43:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 2.8306367432150314) internal successors, (10847), 3832 states have internal predecessors, (10847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-06-04 21:43:26,714 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-06-04 21:43:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:26,714 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-06-04 21:43:26,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-06-04 21:43:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:26,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:26,717 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:26,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-04 21:43:26,918 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:26,918 INFO L82 PathProgramCache]: Analyzing trace with hash -348714832, now seen corresponding path program 147 times [2021-06-04 21:43:26,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:26,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248747697] [2021-06-04 21:43:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:27,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:27,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248747697] [2021-06-04 21:43:27,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248747697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:27,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763888456] [2021-06-04 21:43:27,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:27,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:27,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:27,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:27,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:27,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763888456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:27,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:27,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:27,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183853657] [2021-06-04 21:43:27,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:27,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:27,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:27,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:27,488 INFO L87 Difference]: Start difference. First operand 3833 states and 10847 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:28,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:28,584 INFO L93 Difference]: Finished difference Result 4810 states and 13121 transitions. [2021-06-04 21:43:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:43:28,585 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:28,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:28,589 INFO L225 Difference]: With dead ends: 4810 [2021-06-04 21:43:28,589 INFO L226 Difference]: Without dead ends: 4321 [2021-06-04 21:43:28,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1099.2ms TimeCoverageRelationStatistics Valid=1036, Invalid=2624, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:43:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2021-06-04 21:43:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 3778. [2021-06-04 21:43:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3778 states, 3777 states have (on average 2.8284352660841936) internal successors, (10683), 3777 states have internal predecessors, (10683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 10683 transitions. [2021-06-04 21:43:28,622 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 10683 transitions. Word has length 115 [2021-06-04 21:43:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:28,622 INFO L482 AbstractCegarLoop]: Abstraction has 3778 states and 10683 transitions. [2021-06-04 21:43:28,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:28,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 10683 transitions. [2021-06-04 21:43:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:28,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:28,625 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:28,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-04 21:43:28,826 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:28,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:28,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1146705884, now seen corresponding path program 148 times [2021-06-04 21:43:28,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:28,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646300670] [2021-06-04 21:43:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:29,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:29,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646300670] [2021-06-04 21:43:29,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646300670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:29,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939246033] [2021-06-04 21:43:29,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:29,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:29,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:29,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:43:29,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:29,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939246033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:29,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:29,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-04 21:43:29,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880190904] [2021-06-04 21:43:29,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:43:29,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:29,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:43:29,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:43:29,497 INFO L87 Difference]: Start difference. First operand 3778 states and 10683 transitions. Second operand has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:30,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:30,162 INFO L93 Difference]: Finished difference Result 4868 states and 13183 transitions. [2021-06-04 21:43:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:43:30,163 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:30,167 INFO L225 Difference]: With dead ends: 4868 [2021-06-04 21:43:30,167 INFO L226 Difference]: Without dead ends: 4534 [2021-06-04 21:43:30,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 786.7ms TimeCoverageRelationStatistics Valid=645, Invalid=1805, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:43:30,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2021-06-04 21:43:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 3863. [2021-06-04 21:43:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3862 states have (on average 2.810201967892284) internal successors, (10853), 3862 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 10853 transitions. [2021-06-04 21:43:30,202 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 10853 transitions. Word has length 120 [2021-06-04 21:43:30,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:30,202 INFO L482 AbstractCegarLoop]: Abstraction has 3863 states and 10853 transitions. [2021-06-04 21:43:30,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:30,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 10853 transitions. [2021-06-04 21:43:30,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:30,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:30,205 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:30,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-04 21:43:30,406 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:30,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:30,406 INFO L82 PathProgramCache]: Analyzing trace with hash 51245472, now seen corresponding path program 149 times [2021-06-04 21:43:30,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:30,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36358865] [2021-06-04 21:43:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:30,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:30,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36358865] [2021-06-04 21:43:30,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36358865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:30,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446050733] [2021-06-04 21:43:30,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:30,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:43:30,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:30,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:30,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:31,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446050733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:31,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:31,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:31,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247240829] [2021-06-04 21:43:31,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:31,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:31,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:31,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:31,035 INFO L87 Difference]: Start difference. First operand 3863 states and 10853 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:31,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:31,562 INFO L93 Difference]: Finished difference Result 5561 states and 14377 transitions. [2021-06-04 21:43:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:43:31,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:31,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:31,568 INFO L225 Difference]: With dead ends: 5561 [2021-06-04 21:43:31,568 INFO L226 Difference]: Without dead ends: 5291 [2021-06-04 21:43:31,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 641.5ms TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:43:31,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2021-06-04 21:43:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 3878. [2021-06-04 21:43:31,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:31,604 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:31,604 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:31,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:31,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:31,607 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:31,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-04 21:43:31,807 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash -847277968, now seen corresponding path program 150 times [2021-06-04 21:43:31,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:31,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130978375] [2021-06-04 21:43:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:32,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:32,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130978375] [2021-06-04 21:43:32,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130978375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:32,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715434578] [2021-06-04 21:43:32,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:32,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:43:32,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:32,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:32,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:32,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715434578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:32,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:32,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:32,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480541137] [2021-06-04 21:43:32,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:32,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:32,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:32,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:32,498 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:33,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:33,140 INFO L93 Difference]: Finished difference Result 5446 states and 14147 transitions. [2021-06-04 21:43:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:43:33,140 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:33,146 INFO L225 Difference]: With dead ends: 5446 [2021-06-04 21:43:33,146 INFO L226 Difference]: Without dead ends: 5176 [2021-06-04 21:43:33,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 768.0ms TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:43:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-04 21:43:33,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3878. [2021-06-04 21:43:33,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:33,187 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:33,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:33,187 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:33,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:33,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:33,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:33,190 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:33,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-04 21:43:33,390 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:33,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1832735838, now seen corresponding path program 151 times [2021-06-04 21:43:33,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:33,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756338476] [2021-06-04 21:43:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:33,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:33,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756338476] [2021-06-04 21:43:33,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756338476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:33,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636059807] [2021-06-04 21:43:33,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:33,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:33,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:34,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636059807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:34,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:34,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:34,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009827566] [2021-06-04 21:43:34,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:34,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:34,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:34,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:34,096 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:34,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:34,691 INFO L93 Difference]: Finished difference Result 5421 states and 14097 transitions. [2021-06-04 21:43:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:43:34,691 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:34,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:34,696 INFO L225 Difference]: With dead ends: 5421 [2021-06-04 21:43:34,696 INFO L226 Difference]: Without dead ends: 5151 [2021-06-04 21:43:34,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 734.9ms TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:43:34,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-04 21:43:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 3878. [2021-06-04 21:43:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:34,737 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:34,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:34,737 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:34,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:34,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:34,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:34,740 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:34,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-04 21:43:34,941 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:34,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:34,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1452291886, now seen corresponding path program 152 times [2021-06-04 21:43:34,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:34,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000687316] [2021-06-04 21:43:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:35,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:35,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000687316] [2021-06-04 21:43:35,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000687316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:35,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63213866] [2021-06-04 21:43:35,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:35,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:35,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:35,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:35,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:35,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63213866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:35,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:35,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:35,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703595046] [2021-06-04 21:43:35,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:35,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:35,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:35,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:35,625 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:36,341 INFO L93 Difference]: Finished difference Result 5371 states and 13997 transitions. [2021-06-04 21:43:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:43:36,342 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:36,347 INFO L225 Difference]: With dead ends: 5371 [2021-06-04 21:43:36,347 INFO L226 Difference]: Without dead ends: 5101 [2021-06-04 21:43:36,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 838.0ms TimeCoverageRelationStatistics Valid=590, Invalid=1860, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:43:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-04 21:43:36,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3878. [2021-06-04 21:43:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:36,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:36,383 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:36,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:36,383 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:36,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:36,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:36,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:36,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:36,386 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:36,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:36,586 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:36,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:36,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2076667036, now seen corresponding path program 153 times [2021-06-04 21:43:36,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:36,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595877559] [2021-06-04 21:43:36,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:36,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:36,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595877559] [2021-06-04 21:43:36,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595877559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:36,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044292148] [2021-06-04 21:43:36,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:36,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:43:36,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:36,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:36,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:37,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044292148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:37,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:37,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:37,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137620783] [2021-06-04 21:43:37,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:37,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:37,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:37,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:37,187 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:37,842 INFO L93 Difference]: Finished difference Result 5321 states and 13897 transitions. [2021-06-04 21:43:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:43:37,842 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:37,846 INFO L225 Difference]: With dead ends: 5321 [2021-06-04 21:43:37,846 INFO L226 Difference]: Without dead ends: 5051 [2021-06-04 21:43:37,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 726.4ms TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:43:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-04 21:43:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3878. [2021-06-04 21:43:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:37,882 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:37,882 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:37,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:37,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:37,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:37,885 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:38,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:38,087 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:38,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:38,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1409248404, now seen corresponding path program 154 times [2021-06-04 21:43:38,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:38,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491264579] [2021-06-04 21:43:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:38,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:38,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491264579] [2021-06-04 21:43:38,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491264579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:38,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212337546] [2021-06-04 21:43:38,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:38,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:38,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:38,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:38,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:38,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212337546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:38,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:38,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:38,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439481152] [2021-06-04 21:43:38,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:38,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:38,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:38,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:38,711 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:39,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:39,507 INFO L93 Difference]: Finished difference Result 5271 states and 13797 transitions. [2021-06-04 21:43:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:43:39,508 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:39,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:39,512 INFO L225 Difference]: With dead ends: 5271 [2021-06-04 21:43:39,513 INFO L226 Difference]: Without dead ends: 5001 [2021-06-04 21:43:39,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 866.0ms TimeCoverageRelationStatistics Valid=621, Invalid=2031, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:43:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5001 states. [2021-06-04 21:43:39,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5001 to 3878. [2021-06-04 21:43:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:39,548 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:39,549 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:39,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:39,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:39,552 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:39,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:39,752 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:39,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1493768794, now seen corresponding path program 155 times [2021-06-04 21:43:39,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:39,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349738876] [2021-06-04 21:43:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:40,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:40,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349738876] [2021-06-04 21:43:40,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349738876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:40,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003857036] [2021-06-04 21:43:40,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:40,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:43:40,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:40,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:40,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:40,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003857036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:40,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:40,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:40,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120146896] [2021-06-04 21:43:40,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:40,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:40,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:40,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:40,378 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:41,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:41,093 INFO L93 Difference]: Finished difference Result 5221 states and 13697 transitions. [2021-06-04 21:43:41,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:43:41,093 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:41,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:41,098 INFO L225 Difference]: With dead ends: 5221 [2021-06-04 21:43:41,098 INFO L226 Difference]: Without dead ends: 4951 [2021-06-04 21:43:41,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 747.9ms TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:43:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-04 21:43:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 3878. [2021-06-04 21:43:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:41,133 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:41,134 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:41,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:41,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:41,136 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:41,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:41,337 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1248691498, now seen corresponding path program 156 times [2021-06-04 21:43:41,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:41,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171788594] [2021-06-04 21:43:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:41,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:41,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171788594] [2021-06-04 21:43:41,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171788594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:41,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164032561] [2021-06-04 21:43:41,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:41,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:43:41,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:41,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:41,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:41,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164032561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:41,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:41,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:41,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826445852] [2021-06-04 21:43:41,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:41,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:41,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:41,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:41,962 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:42,853 INFO L93 Difference]: Finished difference Result 5171 states and 13597 transitions. [2021-06-04 21:43:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:43:42,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:42,859 INFO L225 Difference]: With dead ends: 5171 [2021-06-04 21:43:42,859 INFO L226 Difference]: Without dead ends: 4901 [2021-06-04 21:43:42,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 930.5ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:43:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-04 21:43:42,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 3878. [2021-06-04 21:43:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:42,894 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:42,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:42,894 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:42,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:42,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:42,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:42,918 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:43,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:43,119 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash 871841176, now seen corresponding path program 157 times [2021-06-04 21:43:43,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:43,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894537985] [2021-06-04 21:43:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:43,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:43,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894537985] [2021-06-04 21:43:43,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894537985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:43,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279609193] [2021-06-04 21:43:43,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:43,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:43,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:43,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279609193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:43,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:43,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:43,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878778995] [2021-06-04 21:43:43,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:43,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:43,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:43,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:43,687 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:44,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:44,490 INFO L93 Difference]: Finished difference Result 5121 states and 13497 transitions. [2021-06-04 21:43:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:43:44,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:44,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:44,495 INFO L225 Difference]: With dead ends: 5121 [2021-06-04 21:43:44,495 INFO L226 Difference]: Without dead ends: 4851 [2021-06-04 21:43:44,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 819.1ms TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:43:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2021-06-04 21:43:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 3878. [2021-06-04 21:43:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:44,532 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:44,532 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:44,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:44,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:44,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:44,535 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:44,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:44,736 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:44,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:44,736 INFO L82 PathProgramCache]: Analyzing trace with hash -2096370584, now seen corresponding path program 158 times [2021-06-04 21:43:44,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:44,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160257823] [2021-06-04 21:43:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:45,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:45,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160257823] [2021-06-04 21:43:45,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160257823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:45,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184814414] [2021-06-04 21:43:45,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:45,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:45,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:45,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:45,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:45,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184814414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:45,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:45,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:45,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402574778] [2021-06-04 21:43:45,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:45,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:45,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:45,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:45,340 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:46,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:46,371 INFO L93 Difference]: Finished difference Result 5071 states and 13397 transitions. [2021-06-04 21:43:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:43:46,371 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:46,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:46,376 INFO L225 Difference]: With dead ends: 5071 [2021-06-04 21:43:46,376 INFO L226 Difference]: Without dead ends: 4801 [2021-06-04 21:43:46,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1011.6ms TimeCoverageRelationStatistics Valid=731, Invalid=2349, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:43:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4801 states. [2021-06-04 21:43:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4801 to 3878. [2021-06-04 21:43:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:46,411 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:46,411 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:46,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:46,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:46,414 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:46,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:46,617 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:46,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:46,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1642154410, now seen corresponding path program 159 times [2021-06-04 21:43:46,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:46,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138703176] [2021-06-04 21:43:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:46,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:46,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138703176] [2021-06-04 21:43:46,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138703176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:46,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92666661] [2021-06-04 21:43:46,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:46,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:43:46,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:46,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:46,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:47,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92666661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:47,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:47,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:47,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415271098] [2021-06-04 21:43:47,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:47,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:47,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:47,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:47,184 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:48,030 INFO L93 Difference]: Finished difference Result 5021 states and 13297 transitions. [2021-06-04 21:43:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:43:48,030 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:48,035 INFO L225 Difference]: With dead ends: 5021 [2021-06-04 21:43:48,035 INFO L226 Difference]: Without dead ends: 4751 [2021-06-04 21:43:48,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 822.9ms TimeCoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:43:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-06-04 21:43:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3878. [2021-06-04 21:43:48,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:48,084 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:48,084 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:48,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:48,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:48,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:48,087 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:48,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-04 21:43:48,288 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:48,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:48,288 INFO L82 PathProgramCache]: Analyzing trace with hash -643258074, now seen corresponding path program 160 times [2021-06-04 21:43:48,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:48,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931118944] [2021-06-04 21:43:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:48,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:48,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931118944] [2021-06-04 21:43:48,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931118944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:48,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774576690] [2021-06-04 21:43:48,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:48,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:48,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:48,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:48,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:48,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774576690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:48,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:48,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:48,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902831407] [2021-06-04 21:43:48,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:48,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:48,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:48,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:48,916 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:49,960 INFO L93 Difference]: Finished difference Result 4971 states and 13197 transitions. [2021-06-04 21:43:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:43:49,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:49,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:49,965 INFO L225 Difference]: With dead ends: 4971 [2021-06-04 21:43:49,965 INFO L226 Difference]: Without dead ends: 4701 [2021-06-04 21:43:49,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1074.8ms TimeCoverageRelationStatistics Valid=810, Invalid=2496, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:43:49,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2021-06-04 21:43:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 3878. [2021-06-04 21:43:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:50,000 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:50,000 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:50,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:50,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:50,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:50,003 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:50,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-04 21:43:50,204 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:50,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:50,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1772381332, now seen corresponding path program 161 times [2021-06-04 21:43:50,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:50,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481168568] [2021-06-04 21:43:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:50,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:50,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481168568] [2021-06-04 21:43:50,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481168568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:50,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700922348] [2021-06-04 21:43:50,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:50,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:43:50,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:50,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:50,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:50,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700922348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:50,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:50,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:50,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304281131] [2021-06-04 21:43:50,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:50,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:50,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:50,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:50,761 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:51,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:51,679 INFO L93 Difference]: Finished difference Result 4921 states and 13097 transitions. [2021-06-04 21:43:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:43:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:51,685 INFO L225 Difference]: With dead ends: 4921 [2021-06-04 21:43:51,685 INFO L226 Difference]: Without dead ends: 4651 [2021-06-04 21:43:51,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 866.5ms TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:43:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2021-06-04 21:43:51,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 3878. [2021-06-04 21:43:51,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:51,719 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:51,719 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:51,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:51,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:51,722 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:51,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-04 21:43:51,923 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:51,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:51,923 INFO L82 PathProgramCache]: Analyzing trace with hash -492266652, now seen corresponding path program 162 times [2021-06-04 21:43:51,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:51,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775141505] [2021-06-04 21:43:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:52,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:52,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775141505] [2021-06-04 21:43:52,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775141505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:52,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763412100] [2021-06-04 21:43:52,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:52,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:43:52,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:52,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:52,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:52,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763412100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:52,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:52,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:52,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726440352] [2021-06-04 21:43:52,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:52,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:52,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:52,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:52,530 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:53,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:53,674 INFO L93 Difference]: Finished difference Result 4871 states and 12997 transitions. [2021-06-04 21:43:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:43:53,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:53,679 INFO L225 Difference]: With dead ends: 4871 [2021-06-04 21:43:53,679 INFO L226 Difference]: Without dead ends: 4601 [2021-06-04 21:43:53,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1114.2ms TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:43:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-06-04 21:43:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3878. [2021-06-04 21:43:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:53,718 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:53,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:53,718 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:53,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:53,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:53,721 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:53,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:53,922 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:53,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:53,922 INFO L82 PathProgramCache]: Analyzing trace with hash 121972818, now seen corresponding path program 163 times [2021-06-04 21:43:53,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:53,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521421966] [2021-06-04 21:43:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:54,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:54,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521421966] [2021-06-04 21:43:54,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521421966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:54,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874302591] [2021-06-04 21:43:54,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:54,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:54,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874302591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:54,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:54,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:54,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872595870] [2021-06-04 21:43:54,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:54,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:54,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:54,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:54,495 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:55,410 INFO L93 Difference]: Finished difference Result 4821 states and 12897 transitions. [2021-06-04 21:43:55,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:43:55,411 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:55,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:55,416 INFO L225 Difference]: With dead ends: 4821 [2021-06-04 21:43:55,416 INFO L226 Difference]: Without dead ends: 4551 [2021-06-04 21:43:55,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 935.2ms TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:43:55,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-06-04 21:43:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3878. [2021-06-04 21:43:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-04 21:43:55,450 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-04 21:43:55,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:55,451 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-04 21:43:55,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-04 21:43:55,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:55,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:55,454 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:55,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-04 21:43:55,654 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:55,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1593269470, now seen corresponding path program 164 times [2021-06-04 21:43:55,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:55,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271062396] [2021-06-04 21:43:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:55,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:55,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271062396] [2021-06-04 21:43:55,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271062396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:55,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405353916] [2021-06-04 21:43:55,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:55,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:55,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:55,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:55,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:56,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405353916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:56,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:56,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:56,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628820164] [2021-06-04 21:43:56,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:56,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:56,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:56,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:56,229 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:57,513 INFO L93 Difference]: Finished difference Result 5279 states and 14163 transitions. [2021-06-04 21:43:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:43:57,513 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:57,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:57,518 INFO L225 Difference]: With dead ends: 5279 [2021-06-04 21:43:57,518 INFO L226 Difference]: Without dead ends: 4656 [2021-06-04 21:43:57,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1231.5ms TimeCoverageRelationStatistics Valid=1037, Invalid=2995, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:43:57,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4656 states. [2021-06-04 21:43:57,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4656 to 3788. [2021-06-04 21:43:57,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 2.81172432004225) internal successors, (10648), 3787 states have internal predecessors, (10648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 10648 transitions. [2021-06-04 21:43:57,559 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 10648 transitions. Word has length 120 [2021-06-04 21:43:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:57,559 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 10648 transitions. [2021-06-04 21:43:57,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 10648 transitions. [2021-06-04 21:43:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:57,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:57,562 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:57,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:57,763 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:57,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1669050224, now seen corresponding path program 165 times [2021-06-04 21:43:57,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:57,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775246279] [2021-06-04 21:43:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:58,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:58,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775246279] [2021-06-04 21:43:58,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775246279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:58,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393325775] [2021-06-04 21:43:58,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:58,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:43:58,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:58,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:58,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393325775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:58,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:58,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:58,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398964837] [2021-06-04 21:43:58,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:58,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:58,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:58,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:58,320 INFO L87 Difference]: Start difference. First operand 3788 states and 10648 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:59,287 INFO L93 Difference]: Finished difference Result 5508 states and 14881 transitions. [2021-06-04 21:43:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:43:59,287 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:59,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:59,292 INFO L225 Difference]: With dead ends: 5508 [2021-06-04 21:43:59,292 INFO L226 Difference]: Without dead ends: 5238 [2021-06-04 21:43:59,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 958.5ms TimeCoverageRelationStatistics Valid=1017, Invalid=2523, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:43:59,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2021-06-04 21:43:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 3968. [2021-06-04 21:43:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 2.825056717922864) internal successors, (11207), 3967 states have internal predecessors, (11207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 11207 transitions. [2021-06-04 21:43:59,355 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 11207 transitions. Word has length 120 [2021-06-04 21:43:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:59,355 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 11207 transitions. [2021-06-04 21:43:59,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:59,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 11207 transitions. [2021-06-04 21:43:59,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:59,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:59,358 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:59,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:59,558 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:59,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:59,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1691393474, now seen corresponding path program 166 times [2021-06-04 21:43:59,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:59,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551073508] [2021-06-04 21:43:59,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:59,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:59,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551073508] [2021-06-04 21:43:59,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551073508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:59,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979948581] [2021-06-04 21:43:59,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:59,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:59,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:59,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:59,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:00,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979948581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:00,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:00,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-04 21:44:00,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708906290] [2021-06-04 21:44:00,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:00,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:00,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:00,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:00,221 INFO L87 Difference]: Start difference. First operand 3968 states and 11207 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:01,545 INFO L93 Difference]: Finished difference Result 5451 states and 14741 transitions. [2021-06-04 21:44:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:44:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:44:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:01,551 INFO L225 Difference]: With dead ends: 5451 [2021-06-04 21:44:01,551 INFO L226 Difference]: Without dead ends: 4876 [2021-06-04 21:44:01,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 1354.4ms TimeCoverageRelationStatistics Valid=1212, Invalid=3344, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:44:01,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-06-04 21:44:01,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 4003. [2021-06-04 21:44:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:01,587 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 120 [2021-06-04 21:44:01,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:01,587 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:01,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:01,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:01,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:01,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:01,590 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:01,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:01,791 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:01,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:01,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1352458403, now seen corresponding path program 167 times [2021-06-04 21:44:01,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:01,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841756473] [2021-06-04 21:44:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:02,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:02,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841756473] [2021-06-04 21:44:02,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841756473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:02,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790853778] [2021-06-04 21:44:02,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:02,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:44:02,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:02,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:02,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:02,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790853778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:02,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:02,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:02,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820173798] [2021-06-04 21:44:02,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:02,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:02,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:02,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:02,463 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:03,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:03,098 INFO L93 Difference]: Finished difference Result 5246 states and 13897 transitions. [2021-06-04 21:44:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:44:03,099 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:03,103 INFO L225 Difference]: With dead ends: 5246 [2021-06-04 21:44:03,104 INFO L226 Difference]: Without dead ends: 4976 [2021-06-04 21:44:03,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 723.4ms TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:44:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-04 21:44:03,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4003. [2021-06-04 21:44:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:03,140 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:03,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:03,140 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:03,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:03,140 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:03,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:03,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:03,143 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:03,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-04 21:44:03,344 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:03,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2043985453, now seen corresponding path program 168 times [2021-06-04 21:44:03,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:03,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092791570] [2021-06-04 21:44:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:03,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:03,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092791570] [2021-06-04 21:44:03,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092791570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:03,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476684906] [2021-06-04 21:44:03,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:03,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:44:03,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:03,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:03,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:04,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476684906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:04,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:04,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:04,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986085391] [2021-06-04 21:44:04,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:04,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:04,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:04,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:04,058 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:04,767 INFO L93 Difference]: Finished difference Result 5641 states and 14687 transitions. [2021-06-04 21:44:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:44:04,768 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:04,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:04,773 INFO L225 Difference]: With dead ends: 5641 [2021-06-04 21:44:04,773 INFO L226 Difference]: Without dead ends: 5371 [2021-06-04 21:44:04,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 826.5ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:44:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2021-06-04 21:44:04,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 4003. [2021-06-04 21:44:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:04,828 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:04,828 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:04,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:04,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:04,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:04,831 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:05,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:05,032 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:05,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:05,032 INFO L82 PathProgramCache]: Analyzing trace with hash 429031963, now seen corresponding path program 169 times [2021-06-04 21:44:05,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:05,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425947027] [2021-06-04 21:44:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:05,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:05,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425947027] [2021-06-04 21:44:05,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425947027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:05,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271407350] [2021-06-04 21:44:05,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:05,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:05,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271407350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:05,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:05,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:05,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476208199] [2021-06-04 21:44:05,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:05,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:05,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:05,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:05,672 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:06,331 INFO L93 Difference]: Finished difference Result 5596 states and 14597 transitions. [2021-06-04 21:44:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:44:06,332 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:06,337 INFO L225 Difference]: With dead ends: 5596 [2021-06-04 21:44:06,337 INFO L226 Difference]: Without dead ends: 5326 [2021-06-04 21:44:06,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 756.4ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:44:06,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-04 21:44:06,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4003. [2021-06-04 21:44:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:06,374 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:06,374 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:06,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:06,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:06,377 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:06,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-04 21:44:06,578 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:06,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:06,578 INFO L82 PathProgramCache]: Analyzing trace with hash 48588011, now seen corresponding path program 170 times [2021-06-04 21:44:06,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:06,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336060073] [2021-06-04 21:44:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:06,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:06,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336060073] [2021-06-04 21:44:06,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336060073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:06,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890996394] [2021-06-04 21:44:06,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:06,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:06,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:06,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:06,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:07,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890996394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:07,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:07,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:07,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25677869] [2021-06-04 21:44:07,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:07,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:07,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:07,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:07,245 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:08,022 INFO L93 Difference]: Finished difference Result 5546 states and 14497 transitions. [2021-06-04 21:44:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:44:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:08,028 INFO L225 Difference]: With dead ends: 5546 [2021-06-04 21:44:08,028 INFO L226 Difference]: Without dead ends: 5276 [2021-06-04 21:44:08,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 887.4ms TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:44:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-04 21:44:08,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4003. [2021-06-04 21:44:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:08,066 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:08,066 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:08,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:08,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:08,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:08,070 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:08,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-04 21:44:08,270 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:08,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:08,270 INFO L82 PathProgramCache]: Analyzing trace with hash 672963161, now seen corresponding path program 171 times [2021-06-04 21:44:08,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:08,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125229825] [2021-06-04 21:44:08,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:08,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:08,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125229825] [2021-06-04 21:44:08,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125229825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:08,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298075884] [2021-06-04 21:44:08,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:08,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:44:08,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:08,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:08,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:08,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298075884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:08,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:08,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:08,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300772989] [2021-06-04 21:44:08,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:08,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:08,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:08,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:08,901 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:09,625 INFO L93 Difference]: Finished difference Result 5496 states and 14397 transitions. [2021-06-04 21:44:09,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:44:09,625 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:09,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:09,630 INFO L225 Difference]: With dead ends: 5496 [2021-06-04 21:44:09,630 INFO L226 Difference]: Without dead ends: 5226 [2021-06-04 21:44:09,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 790.2ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:44:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-04 21:44:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4003. [2021-06-04 21:44:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:09,667 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:09,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:09,668 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:09,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:09,668 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:09,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:09,671 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:09,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-04 21:44:09,871 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:09,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:09,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1482015017, now seen corresponding path program 172 times [2021-06-04 21:44:09,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:09,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089602850] [2021-06-04 21:44:09,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:10,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:10,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089602850] [2021-06-04 21:44:10,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089602850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:10,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138325467] [2021-06-04 21:44:10,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:10,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:10,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:10,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:10,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:10,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138325467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:10,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:10,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:10,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924331853] [2021-06-04 21:44:10,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:10,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:10,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:10,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:10,552 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:11,402 INFO L93 Difference]: Finished difference Result 5446 states and 14297 transitions. [2021-06-04 21:44:11,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:44:11,402 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:11,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:11,408 INFO L225 Difference]: With dead ends: 5446 [2021-06-04 21:44:11,408 INFO L226 Difference]: Without dead ends: 5176 [2021-06-04 21:44:11,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 950.5ms TimeCoverageRelationStatistics Valid=691, Invalid=2279, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:44:11,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-04 21:44:11,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4003. [2021-06-04 21:44:11,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:11,466 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:11,466 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:11,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:11,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:11,470 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:11,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-04 21:44:11,677 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:11,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:11,677 INFO L82 PathProgramCache]: Analyzing trace with hash 90064919, now seen corresponding path program 173 times [2021-06-04 21:44:11,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:11,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765906687] [2021-06-04 21:44:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:11,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:11,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765906687] [2021-06-04 21:44:11,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765906687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:11,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356352500] [2021-06-04 21:44:11,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:12,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:44:12,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:12,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:12,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:12,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356352500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:12,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:12,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:12,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340654122] [2021-06-04 21:44:12,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:12,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:12,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:12,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:12,283 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:13,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:13,072 INFO L93 Difference]: Finished difference Result 5396 states and 14197 transitions. [2021-06-04 21:44:13,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:44:13,072 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:13,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:13,077 INFO L225 Difference]: With dead ends: 5396 [2021-06-04 21:44:13,077 INFO L226 Difference]: Without dead ends: 5126 [2021-06-04 21:44:13,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 839.4ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:44:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-04 21:44:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4003. [2021-06-04 21:44:13,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:13,113 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:13,113 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:13,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:13,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:13,117 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:13,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:13,317 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:13,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:13,317 INFO L82 PathProgramCache]: Analyzing trace with hash -155012377, now seen corresponding path program 174 times [2021-06-04 21:44:13,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:13,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928478393] [2021-06-04 21:44:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:13,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:13,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928478393] [2021-06-04 21:44:13,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928478393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:13,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698959643] [2021-06-04 21:44:13,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:13,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:44:13,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:13,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:13,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:13,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698959643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:13,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:13,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:13,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414907631] [2021-06-04 21:44:13,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:13,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:13,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:13,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:13,963 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:14,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:14,894 INFO L93 Difference]: Finished difference Result 5346 states and 14097 transitions. [2021-06-04 21:44:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:44:14,895 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:14,900 INFO L225 Difference]: With dead ends: 5346 [2021-06-04 21:44:14,900 INFO L226 Difference]: Without dead ends: 5076 [2021-06-04 21:44:14,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 976.9ms TimeCoverageRelationStatistics Valid=745, Invalid=2447, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:44:14,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-04 21:44:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 4003. [2021-06-04 21:44:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:14,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:14,936 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:14,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:14,936 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:14,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:14,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:14,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:14,939 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:15,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-04 21:44:15,140 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:15,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:15,140 INFO L82 PathProgramCache]: Analyzing trace with hash -531862699, now seen corresponding path program 175 times [2021-06-04 21:44:15,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:15,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672393626] [2021-06-04 21:44:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:15,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:15,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672393626] [2021-06-04 21:44:15,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672393626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:15,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668165948] [2021-06-04 21:44:15,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:15,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:15,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:15,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668165948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:15,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:15,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:15,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169122516] [2021-06-04 21:44:15,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:15,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:15,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:15,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:15,759 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:16,590 INFO L93 Difference]: Finished difference Result 5296 states and 13997 transitions. [2021-06-04 21:44:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:44:16,590 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:16,595 INFO L225 Difference]: With dead ends: 5296 [2021-06-04 21:44:16,595 INFO L226 Difference]: Without dead ends: 5026 [2021-06-04 21:44:16,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 880.5ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:44:16,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2021-06-04 21:44:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 4003. [2021-06-04 21:44:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:16,633 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:16,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:16,633 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:16,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:16,633 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:16,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:16,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:16,636 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:16,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:16,837 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:16,837 INFO L82 PathProgramCache]: Analyzing trace with hash 794892837, now seen corresponding path program 176 times [2021-06-04 21:44:16,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:16,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441563133] [2021-06-04 21:44:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:17,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:17,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441563133] [2021-06-04 21:44:17,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441563133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:17,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563501354] [2021-06-04 21:44:17,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:17,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:17,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:17,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:17,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:17,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563501354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:17,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:17,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:17,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428742621] [2021-06-04 21:44:17,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:17,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:17,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:17,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:17,480 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:18,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:18,498 INFO L93 Difference]: Finished difference Result 5246 states and 13897 transitions. [2021-06-04 21:44:18,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:44:18,498 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:18,503 INFO L225 Difference]: With dead ends: 5246 [2021-06-04 21:44:18,503 INFO L226 Difference]: Without dead ends: 4976 [2021-06-04 21:44:18,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1055.4ms TimeCoverageRelationStatistics Valid=815, Invalid=2607, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:44:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-04 21:44:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4003. [2021-06-04 21:44:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:18,540 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:18,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:18,540 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:18,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:18,540 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:18,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:18,543 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:18,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:18,744 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:18,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:18,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1249109011, now seen corresponding path program 177 times [2021-06-04 21:44:18,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:18,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789397229] [2021-06-04 21:44:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:19,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:19,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789397229] [2021-06-04 21:44:19,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789397229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:19,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196380610] [2021-06-04 21:44:19,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:19,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:44:19,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:19,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:19,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:19,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196380610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:19,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:19,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:19,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874030708] [2021-06-04 21:44:19,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:19,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:19,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:19,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:19,345 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:20,236 INFO L93 Difference]: Finished difference Result 5196 states and 13797 transitions. [2021-06-04 21:44:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:44:20,237 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:20,241 INFO L225 Difference]: With dead ends: 5196 [2021-06-04 21:44:20,242 INFO L226 Difference]: Without dead ends: 4926 [2021-06-04 21:44:20,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 900.5ms TimeCoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:44:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2021-06-04 21:44:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 4003. [2021-06-04 21:44:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:20,283 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:20,283 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:20,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:20,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:20,286 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:20,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:20,486 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:20,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:20,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2046961949, now seen corresponding path program 178 times [2021-06-04 21:44:20,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:20,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135321984] [2021-06-04 21:44:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:20,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:20,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135321984] [2021-06-04 21:44:20,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135321984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:20,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440637446] [2021-06-04 21:44:20,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:20,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:20,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:20,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:20,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:21,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440637446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:21,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:21,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:21,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827857976] [2021-06-04 21:44:21,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:21,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:21,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:21,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:21,132 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:22,232 INFO L93 Difference]: Finished difference Result 5146 states and 13697 transitions. [2021-06-04 21:44:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:44:22,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:22,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:22,237 INFO L225 Difference]: With dead ends: 5146 [2021-06-04 21:44:22,237 INFO L226 Difference]: Without dead ends: 4876 [2021-06-04 21:44:22,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1098.7ms TimeCoverageRelationStatistics Valid=901, Invalid=2759, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:44:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-06-04 21:44:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 4003. [2021-06-04 21:44:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:22,273 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:22,273 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:22,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:22,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:22,276 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:22,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:22,477 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:22,477 INFO L82 PathProgramCache]: Analyzing trace with hash 368677457, now seen corresponding path program 179 times [2021-06-04 21:44:22,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:22,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787356257] [2021-06-04 21:44:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:22,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:22,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787356257] [2021-06-04 21:44:22,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787356257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:22,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752584857] [2021-06-04 21:44:22,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:22,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:44:22,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:22,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:22,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:23,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752584857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:23,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:23,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:23,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044024344] [2021-06-04 21:44:23,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:23,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:23,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:23,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:23,065 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:24,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:24,051 INFO L93 Difference]: Finished difference Result 5096 states and 13597 transitions. [2021-06-04 21:44:24,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:44:24,051 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:24,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:24,056 INFO L225 Difference]: With dead ends: 5096 [2021-06-04 21:44:24,056 INFO L226 Difference]: Without dead ends: 4826 [2021-06-04 21:44:24,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 957.6ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:44:24,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-06-04 21:44:24,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4003. [2021-06-04 21:44:24,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:24,093 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:24,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:24,093 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:24,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:24,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:24,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:24,096 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:24,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-04 21:44:24,297 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:24,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:24,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1895970527, now seen corresponding path program 180 times [2021-06-04 21:44:24,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:24,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853641418] [2021-06-04 21:44:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:24,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:24,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853641418] [2021-06-04 21:44:24,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853641418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:24,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885159360] [2021-06-04 21:44:24,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:24,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:44:24,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:24,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:24,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:24,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885159360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:24,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:24,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:24,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033877507] [2021-06-04 21:44:24,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:24,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:24,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:24,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:24,918 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:26,085 INFO L93 Difference]: Finished difference Result 5046 states and 13497 transitions. [2021-06-04 21:44:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:44:26,086 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:26,091 INFO L225 Difference]: With dead ends: 5046 [2021-06-04 21:44:26,091 INFO L226 Difference]: Without dead ends: 4776 [2021-06-04 21:44:26,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1148.8ms TimeCoverageRelationStatistics Valid=1003, Invalid=2903, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:44:26,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4776 states. [2021-06-04 21:44:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4776 to 4003. [2021-06-04 21:44:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:26,152 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:26,152 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:26,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:26,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:26,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:26,155 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:26,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-04 21:44:26,356 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:26,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1281731057, now seen corresponding path program 181 times [2021-06-04 21:44:26,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:26,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152410224] [2021-06-04 21:44:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:26,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:26,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152410224] [2021-06-04 21:44:26,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152410224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:26,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085897584] [2021-06-04 21:44:26,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:26,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:26,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:26,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085897584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:26,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:26,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:26,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554993813] [2021-06-04 21:44:26,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:26,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:26,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:26,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:26,931 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:27,926 INFO L93 Difference]: Finished difference Result 4996 states and 13397 transitions. [2021-06-04 21:44:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:44:27,926 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:27,931 INFO L225 Difference]: With dead ends: 4996 [2021-06-04 21:44:27,931 INFO L226 Difference]: Without dead ends: 4726 [2021-06-04 21:44:27,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 984.7ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:44:27,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2021-06-04 21:44:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 4003. [2021-06-04 21:44:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-04 21:44:27,967 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-04 21:44:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:27,967 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-04 21:44:27,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-04 21:44:27,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:27,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:27,970 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:28,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-04 21:44:28,171 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:28,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1297993951, now seen corresponding path program 182 times [2021-06-04 21:44:28,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:28,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732920181] [2021-06-04 21:44:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:28,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:28,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732920181] [2021-06-04 21:44:28,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732920181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:28,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844214375] [2021-06-04 21:44:28,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:28,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:28,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:28,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:28,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:28,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844214375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:28,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:28,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:28,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28479442] [2021-06-04 21:44:28,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:28,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:28,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:28,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:28,785 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:30,024 INFO L93 Difference]: Finished difference Result 5006 states and 13447 transitions. [2021-06-04 21:44:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:44:30,024 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:30,029 INFO L225 Difference]: With dead ends: 5006 [2021-06-04 21:44:30,029 INFO L226 Difference]: Without dead ends: 4736 [2021-06-04 21:44:30,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1232.7ms TimeCoverageRelationStatistics Valid=1121, Invalid=3039, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:44:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-06-04 21:44:30,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 4003. [2021-06-04 21:44:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8205897051474262) internal successors, (11288), 4002 states have internal predecessors, (11288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11288 transitions. [2021-06-04 21:44:30,064 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11288 transitions. Word has length 125 [2021-06-04 21:44:30,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:30,064 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11288 transitions. [2021-06-04 21:44:30,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11288 transitions. [2021-06-04 21:44:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:30,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:30,067 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:30,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:30,269 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:30,269 INFO L82 PathProgramCache]: Analyzing trace with hash 265346349, now seen corresponding path program 183 times [2021-06-04 21:44:30,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:30,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737452812] [2021-06-04 21:44:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:30,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:30,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737452812] [2021-06-04 21:44:30,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737452812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:30,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947346440] [2021-06-04 21:44:30,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:30,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:44:30,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:30,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:30,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947346440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:30,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:30,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:30,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552369157] [2021-06-04 21:44:30,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:30,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:30,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:30,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:30,857 INFO L87 Difference]: Start difference. First operand 4003 states and 11288 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:31,920 INFO L93 Difference]: Finished difference Result 5748 states and 15571 transitions. [2021-06-04 21:44:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:44:31,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:31,925 INFO L225 Difference]: With dead ends: 5748 [2021-06-04 21:44:31,925 INFO L226 Difference]: Without dead ends: 5478 [2021-06-04 21:44:31,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1048.7ms TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:44:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-06-04 21:44:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 4183. [2021-06-04 21:44:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 2.832855093256815) internal successors, (11847), 4182 states have internal predecessors, (11847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 11847 transitions. [2021-06-04 21:44:31,964 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 11847 transitions. Word has length 125 [2021-06-04 21:44:31,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:31,964 INFO L482 AbstractCegarLoop]: Abstraction has 4183 states and 11847 transitions. [2021-06-04 21:44:31,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:31,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 11847 transitions. [2021-06-04 21:44:31,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:31,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:31,968 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:32,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:32,173 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:32,173 INFO L82 PathProgramCache]: Analyzing trace with hash 287689599, now seen corresponding path program 184 times [2021-06-04 21:44:32,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:32,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151851341] [2021-06-04 21:44:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:32,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:32,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151851341] [2021-06-04 21:44:32,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151851341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:32,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876020156] [2021-06-04 21:44:32,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:32,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:32,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:32,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:32,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:32,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876020156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:32,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:32,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:32,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466650237] [2021-06-04 21:44:32,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:32,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:32,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:32,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:32,773 INFO L87 Difference]: Start difference. First operand 4183 states and 11847 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:34,046 INFO L93 Difference]: Finished difference Result 5210 states and 14221 transitions. [2021-06-04 21:44:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:44:34,047 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:34,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:34,052 INFO L225 Difference]: With dead ends: 5210 [2021-06-04 21:44:34,052 INFO L226 Difference]: Without dead ends: 4721 [2021-06-04 21:44:34,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 1258.8ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:44:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2021-06-04 21:44:34,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 4128. [2021-06-04 21:44:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4127 states have (on average 2.8308698812696873) internal successors, (11683), 4127 states have internal predecessors, (11683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 11683 transitions. [2021-06-04 21:44:34,091 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 11683 transitions. Word has length 125 [2021-06-04 21:44:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:34,091 INFO L482 AbstractCegarLoop]: Abstraction has 4128 states and 11683 transitions. [2021-06-04 21:44:34,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 11683 transitions. [2021-06-04 21:44:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:34,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:34,094 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:34,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:34,294 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:34,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:34,295 INFO L82 PathProgramCache]: Analyzing trace with hash -325106707, now seen corresponding path program 185 times [2021-06-04 21:44:34,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:34,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964167056] [2021-06-04 21:44:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:34,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:34,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964167056] [2021-06-04 21:44:34,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964167056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:34,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686009807] [2021-06-04 21:44:34,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:34,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:44:34,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:34,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:34,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:35,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686009807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:35,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:35,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:44:35,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331748721] [2021-06-04 21:44:35,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:44:35,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:35,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:44:35,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:44:35,124 INFO L87 Difference]: Start difference. First operand 4128 states and 11683 transitions. Second operand has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:35,796 INFO L93 Difference]: Finished difference Result 4948 states and 13451 transitions. [2021-06-04 21:44:35,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:44:35,797 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:35,802 INFO L225 Difference]: With dead ends: 4948 [2021-06-04 21:44:35,802 INFO L226 Difference]: Without dead ends: 4678 [2021-06-04 21:44:35,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 895.1ms TimeCoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:44:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-06-04 21:44:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 4213. [2021-06-04 21:44:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.8141025641025643) internal successors, (11853), 4212 states have internal predecessors, (11853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 11853 transitions. [2021-06-04 21:44:35,838 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 11853 transitions. Word has length 130 [2021-06-04 21:44:35,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:35,839 INFO L482 AbstractCegarLoop]: Abstraction has 4213 states and 11853 transitions. [2021-06-04 21:44:35,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 11853 transitions. [2021-06-04 21:44:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:35,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:35,842 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:36,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:36,042 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:36,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2008975183, now seen corresponding path program 186 times [2021-06-04 21:44:36,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:36,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315391437] [2021-06-04 21:44:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:36,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:36,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315391437] [2021-06-04 21:44:36,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315391437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:36,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880532445] [2021-06-04 21:44:36,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:36,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:44:36,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:36,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:36,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:36,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880532445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:36,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:36,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:36,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791333579] [2021-06-04 21:44:36,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:36,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:36,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:36,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:36,761 INFO L87 Difference]: Start difference. First operand 4213 states and 11853 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:37,378 INFO L93 Difference]: Finished difference Result 6061 states and 15677 transitions. [2021-06-04 21:44:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:44:37,378 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:37,383 INFO L225 Difference]: With dead ends: 6061 [2021-06-04 21:44:37,383 INFO L226 Difference]: Without dead ends: 5791 [2021-06-04 21:44:37,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 774.0ms TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:44:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5791 states. [2021-06-04 21:44:37,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5791 to 4228. [2021-06-04 21:44:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:44:37,427 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:44:37,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:37,427 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:44:37,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:44:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:37,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:37,430 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:37,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-04 21:44:37,631 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:37,631 INFO L82 PathProgramCache]: Analyzing trace with hash -644426879, now seen corresponding path program 187 times [2021-06-04 21:44:37,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:37,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675708661] [2021-06-04 21:44:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:38,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:38,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675708661] [2021-06-04 21:44:38,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675708661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:38,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142749413] [2021-06-04 21:44:38,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:38,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:38,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:38,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142749413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:38,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:38,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:38,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257785887] [2021-06-04 21:44:38,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:38,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:38,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:38,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:38,369 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:39,075 INFO L93 Difference]: Finished difference Result 5946 states and 15447 transitions. [2021-06-04 21:44:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:44:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:39,080 INFO L225 Difference]: With dead ends: 5946 [2021-06-04 21:44:39,080 INFO L226 Difference]: Without dead ends: 5676 [2021-06-04 21:44:39,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 871.4ms TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:44:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-04 21:44:39,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 4228. [2021-06-04 21:44:39,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:44:39,119 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:44:39,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:39,120 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:44:39,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:44:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:39,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:39,123 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:39,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:39,324 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:39,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1373308399, now seen corresponding path program 188 times [2021-06-04 21:44:39,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:39,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83319486] [2021-06-04 21:44:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:39,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:39,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83319486] [2021-06-04 21:44:39,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83319486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:39,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661695940] [2021-06-04 21:44:39,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:39,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:39,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:39,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:39,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:40,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661695940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:40,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:40,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:40,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870879687] [2021-06-04 21:44:40,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:40,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:40,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:40,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:40,025 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:40,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:40,682 INFO L93 Difference]: Finished difference Result 5921 states and 15397 transitions. [2021-06-04 21:44:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:44:40,682 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:40,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:40,688 INFO L225 Difference]: With dead ends: 5921 [2021-06-04 21:44:40,688 INFO L226 Difference]: Without dead ends: 5651 [2021-06-04 21:44:40,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 798.7ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:44:40,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-04 21:44:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4228. [2021-06-04 21:44:40,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:44:40,726 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:44:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:40,726 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:44:40,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:44:40,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:40,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:40,729 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:40,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:40,930 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:40,930 INFO L82 PathProgramCache]: Analyzing trace with hash 474784959, now seen corresponding path program 189 times [2021-06-04 21:44:40,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:40,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571949010] [2021-06-04 21:44:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:41,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:41,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571949010] [2021-06-04 21:44:41,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571949010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:41,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133055634] [2021-06-04 21:44:41,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:41,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:44:41,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:41,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:41,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133055634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:41,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:41,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:41,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025402789] [2021-06-04 21:44:41,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:41,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:41,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:41,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:41,646 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:42,465 INFO L93 Difference]: Finished difference Result 5871 states and 15297 transitions. [2021-06-04 21:44:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:44:42,465 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:42,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:42,471 INFO L225 Difference]: With dead ends: 5871 [2021-06-04 21:44:42,471 INFO L226 Difference]: Without dead ends: 5601 [2021-06-04 21:44:42,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 938.4ms TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:44:42,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-04 21:44:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4228. [2021-06-04 21:44:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:42,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:44:42,512 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:44:42,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:42,512 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:44:42,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:42,512 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:44:42,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:42,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:42,516 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:42,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:42,716 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:42,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:42,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1140168531, now seen corresponding path program 190 times [2021-06-04 21:44:42,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:42,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124591869] [2021-06-04 21:44:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:43,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:43,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124591869] [2021-06-04 21:44:43,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124591869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:43,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135220918] [2021-06-04 21:44:43,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:43,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:43,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:43,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:43,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135220918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:43,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:43,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:43,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937331342] [2021-06-04 21:44:43,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:43,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:43,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:43,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:43,371 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:44,098 INFO L93 Difference]: Finished difference Result 5821 states and 15197 transitions. [2021-06-04 21:44:44,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:44:44,098 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:44,104 INFO L225 Difference]: With dead ends: 5821 [2021-06-04 21:44:44,104 INFO L226 Difference]: Without dead ends: 5551 [2021-06-04 21:44:44,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 810.3ms TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:44:44,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-04 21:44:44,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4228. [2021-06-04 21:44:44,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:44:44,144 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:44:44,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:44,144 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:44:44,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:44:44,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:44,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:44,147 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:44,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:44,348 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:44,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:44,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1520612483, now seen corresponding path program 191 times [2021-06-04 21:44:44,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:44,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906999760] [2021-06-04 21:44:44,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:44,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:44,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906999760] [2021-06-04 21:44:44,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906999760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:44,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469488864] [2021-06-04 21:44:44,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:44,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:44:44,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:44,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:44,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:45,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469488864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:45,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:45,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:45,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274921611] [2021-06-04 21:44:45,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:45,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:45,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:45,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:45,065 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:45,956 INFO L93 Difference]: Finished difference Result 5771 states and 15097 transitions. [2021-06-04 21:44:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:44:45,957 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:45,962 INFO L225 Difference]: With dead ends: 5771 [2021-06-04 21:44:45,962 INFO L226 Difference]: Without dead ends: 5501 [2021-06-04 21:44:45,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 975.7ms TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:44:45,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-06-04 21:44:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 4228. [2021-06-04 21:44:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:46,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:44:46,001 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:44:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:46,001 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:44:46,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:44:46,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:46,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:46,005 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:46,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-04 21:44:46,205 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:46,205 INFO L82 PathProgramCache]: Analyzing trace with hash -896237333, now seen corresponding path program 192 times [2021-06-04 21:44:46,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:46,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212978834] [2021-06-04 21:44:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:46,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:46,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212978834] [2021-06-04 21:44:46,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212978834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:46,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125530362] [2021-06-04 21:44:46,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:46,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:44:46,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:46,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:46,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:46,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125530362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:46,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:46,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:46,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597365745] [2021-06-04 21:44:46,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:46,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:46,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:46,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:46,859 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:47,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:47,706 INFO L93 Difference]: Finished difference Result 5721 states and 14997 transitions. [2021-06-04 21:44:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:44:47,706 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:47,711 INFO L225 Difference]: With dead ends: 5721 [2021-06-04 21:44:47,711 INFO L226 Difference]: Without dead ends: 5451 [2021-06-04 21:44:47,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 864.0ms TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:44:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-04 21:44:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4228. [2021-06-04 21:44:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:44:47,749 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:44:47,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:47,749 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:44:47,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:44:47,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:47,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:47,753 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:47,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-04 21:44:47,953 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:47,953 INFO L82 PathProgramCache]: Analyzing trace with hash -87185477, now seen corresponding path program 193 times [2021-06-04 21:44:47,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:47,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784542364] [2021-06-04 21:44:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:48,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:48,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784542364] [2021-06-04 21:44:48,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784542364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:48,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006931115] [2021-06-04 21:44:48,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:48,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:48,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:48,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006931115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:48,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:48,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:48,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601709409] [2021-06-04 21:44:48,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:48,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:48,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:48,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:48,638 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:49,670 INFO L93 Difference]: Finished difference Result 5671 states and 14897 transitions. [2021-06-04 21:44:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:44:49,670 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:49,676 INFO L225 Difference]: With dead ends: 5671 [2021-06-04 21:44:49,676 INFO L226 Difference]: Without dead ends: 5401 [2021-06-04 21:44:49,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1035.9ms TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:44:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-04 21:44:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4228. [2021-06-04 21:44:49,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:44:49,714 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:44:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:49,714 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:44:49,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:44:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:49,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:49,718 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:49,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-04 21:44:49,918 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:49,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:49,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1479135575, now seen corresponding path program 194 times [2021-06-04 21:44:49,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:49,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876677014] [2021-06-04 21:44:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:50,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:50,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876677014] [2021-06-04 21:44:50,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876677014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:50,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244294334] [2021-06-04 21:44:50,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:50,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:50,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:50,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:50,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:50,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244294334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:50,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:50,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:50,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261572676] [2021-06-04 21:44:50,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:50,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:50,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:50,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:50,600 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:51,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:51,463 INFO L93 Difference]: Finished difference Result 5621 states and 14797 transitions. [2021-06-04 21:44:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:44:51,464 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:51,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:51,469 INFO L225 Difference]: With dead ends: 5621 [2021-06-04 21:44:51,469 INFO L226 Difference]: Without dead ends: 5351 [2021-06-04 21:44:51,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 923.6ms TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:44:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-04 21:44:51,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4228. [2021-06-04 21:44:51,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:44:51,510 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:44:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:51,510 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:44:51,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:44:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:51,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:51,513 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:51,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-04 21:44:51,713 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:51,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1724212871, now seen corresponding path program 195 times [2021-06-04 21:44:51,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:51,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739682666] [2021-06-04 21:44:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:52,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:52,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739682666] [2021-06-04 21:44:52,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739682666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:52,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529651442] [2021-06-04 21:44:52,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:52,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:44:52,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:52,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:52,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:52,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529651442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:52,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:52,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:52,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941893874] [2021-06-04 21:44:52,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:52,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:52,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:52,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:52,384 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:53,512 INFO L93 Difference]: Finished difference Result 5571 states and 14697 transitions. [2021-06-04 21:44:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:44:53,512 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:53,517 INFO L225 Difference]: With dead ends: 5571 [2021-06-04 21:44:53,517 INFO L226 Difference]: Without dead ends: 5301 [2021-06-04 21:44:53,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1105.6ms TimeCoverageRelationStatistics Valid=831, Invalid=2709, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:44:53,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-04 21:44:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 4228. [2021-06-04 21:44:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:44:53,556 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:44:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:53,556 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:44:53,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:44:53,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:53,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:53,560 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:53,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:53,760 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:53,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:53,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2101063193, now seen corresponding path program 196 times [2021-06-04 21:44:53,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:53,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363737898] [2021-06-04 21:44:53,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:54,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:54,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363737898] [2021-06-04 21:44:54,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363737898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:54,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87442759] [2021-06-04 21:44:54,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:54,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:54,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:54,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:54,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:54,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87442759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:54,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:54,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:54,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912270849] [2021-06-04 21:44:54,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:54,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:54,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:54,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:54,385 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:55,301 INFO L93 Difference]: Finished difference Result 5521 states and 14597 transitions. [2021-06-04 21:44:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:44:55,301 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:55,307 INFO L225 Difference]: With dead ends: 5521 [2021-06-04 21:44:55,307 INFO L226 Difference]: Without dead ends: 5251 [2021-06-04 21:44:55,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 935.2ms TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:44:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-04 21:44:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4228. [2021-06-04 21:44:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:44:55,365 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:44:55,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:55,365 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:44:55,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:44:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:55,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:55,368 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:55,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-04 21:44:55,569 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:55,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash -774307657, now seen corresponding path program 197 times [2021-06-04 21:44:55,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:55,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525458519] [2021-06-04 21:44:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:55,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:55,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525458519] [2021-06-04 21:44:55,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525458519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:55,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666134352] [2021-06-04 21:44:55,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:55,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:44:55,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:55,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:55,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:56,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666134352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:56,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:56,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:56,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886486062] [2021-06-04 21:44:56,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:56,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:56,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:56,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:56,225 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:57,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:57,427 INFO L93 Difference]: Finished difference Result 5471 states and 14497 transitions. [2021-06-04 21:44:57,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:44:57,428 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:57,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:57,433 INFO L225 Difference]: With dead ends: 5471 [2021-06-04 21:44:57,433 INFO L226 Difference]: Without dead ends: 5201 [2021-06-04 21:44:57,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1159.5ms TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:44:57,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-06-04 21:44:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 4228. [2021-06-04 21:44:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:44:57,473 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:44:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:57,473 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:44:57,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:44:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:57,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:57,476 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:57,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:57,677 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:57,677 INFO L82 PathProgramCache]: Analyzing trace with hash -320091483, now seen corresponding path program 198 times [2021-06-04 21:44:57,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:57,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060635016] [2021-06-04 21:44:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:57,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:57,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060635016] [2021-06-04 21:44:57,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060635016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:57,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784654059] [2021-06-04 21:44:57,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:58,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:44:58,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:58,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:58,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:58,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784654059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:58,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:58,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:58,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657518025] [2021-06-04 21:44:58,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:58,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:58,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:58,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:58,343 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:59,355 INFO L93 Difference]: Finished difference Result 5421 states and 14397 transitions. [2021-06-04 21:44:59,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:44:59,355 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:59,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:59,360 INFO L225 Difference]: With dead ends: 5421 [2021-06-04 21:44:59,360 INFO L226 Difference]: Without dead ends: 5151 [2021-06-04 21:44:59,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 983.3ms TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:44:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-04 21:44:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 4228. [2021-06-04 21:44:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:44:59,400 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:44:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:59,400 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:44:59,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:44:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:59,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:59,403 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:59,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-04 21:44:59,604 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:59,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:59,604 INFO L82 PathProgramCache]: Analyzing trace with hash 678804853, now seen corresponding path program 199 times [2021-06-04 21:44:59,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:59,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162350166] [2021-06-04 21:44:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:59,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:59,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162350166] [2021-06-04 21:44:59,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162350166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:59,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257242980] [2021-06-04 21:44:59,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:59,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:59,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:00,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257242980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:00,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:00,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:45:00,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948805680] [2021-06-04 21:45:00,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:45:00,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:00,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:45:00,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:45:00,253 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:01,522 INFO L93 Difference]: Finished difference Result 5371 states and 14297 transitions. [2021-06-04 21:45:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:45:01,523 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:45:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:01,527 INFO L225 Difference]: With dead ends: 5371 [2021-06-04 21:45:01,527 INFO L226 Difference]: Without dead ends: 5101 [2021-06-04 21:45:01,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1237.4ms TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:45:01,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-04 21:45:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 4228. [2021-06-04 21:45:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:45:01,567 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:45:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:01,568 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:45:01,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:01,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:45:01,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:45:01,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:01,571 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:01,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:01,772 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1200523037, now seen corresponding path program 200 times [2021-06-04 21:45:01,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:01,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25924102] [2021-06-04 21:45:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:02,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:02,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25924102] [2021-06-04 21:45:02,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25924102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:02,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845889882] [2021-06-04 21:45:02,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:02,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:02,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:02,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:45:02,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:02,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845889882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:02,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:02,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:45:02,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837854477] [2021-06-04 21:45:02,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:45:02,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:02,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:45:02,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:45:02,459 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:03,535 INFO L93 Difference]: Finished difference Result 5321 states and 14197 transitions. [2021-06-04 21:45:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:45:03,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:45:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:03,540 INFO L225 Difference]: With dead ends: 5321 [2021-06-04 21:45:03,540 INFO L226 Difference]: Without dead ends: 5051 [2021-06-04 21:45:03,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1079.8ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:45:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-04 21:45:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 4228. [2021-06-04 21:45:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:45:03,601 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:45:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:03,601 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:45:03,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:45:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:45:03,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:03,604 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:03,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:03,805 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:03,805 INFO L82 PathProgramCache]: Analyzing trace with hash 829796275, now seen corresponding path program 201 times [2021-06-04 21:45:03,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:03,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429188545] [2021-06-04 21:45:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:04,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:04,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429188545] [2021-06-04 21:45:04,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429188545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:04,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153600560] [2021-06-04 21:45:04,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:04,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:45:04,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:04,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:45:04,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:04,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153600560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:04,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:04,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:45:04,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460369467] [2021-06-04 21:45:04,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:45:04,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:04,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:45:04,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:45:04,457 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:05,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:05,764 INFO L93 Difference]: Finished difference Result 5271 states and 14097 transitions. [2021-06-04 21:45:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:45:05,765 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:45:05,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:05,770 INFO L225 Difference]: With dead ends: 5271 [2021-06-04 21:45:05,770 INFO L226 Difference]: Without dead ends: 5001 [2021-06-04 21:45:05,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1303.6ms TimeCoverageRelationStatistics Valid=1110, Invalid=3180, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:45:05,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5001 states. [2021-06-04 21:45:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5001 to 4228. [2021-06-04 21:45:05,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:05,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:45:05,811 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:45:05,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:05,811 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:45:05,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:45:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:45:05,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:05,815 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:06,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:06,015 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:06,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:06,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1444035745, now seen corresponding path program 202 times [2021-06-04 21:45:06,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:06,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100912809] [2021-06-04 21:45:06,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:06,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:06,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100912809] [2021-06-04 21:45:06,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100912809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:06,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090268726] [2021-06-04 21:45:06,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:06,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:06,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:06,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:45:06,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:06,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090268726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:06,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:06,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:45:06,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364520671] [2021-06-04 21:45:06,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:45:06,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:06,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:45:06,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:45:06,652 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:07,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:07,727 INFO L93 Difference]: Finished difference Result 5221 states and 13997 transitions. [2021-06-04 21:45:07,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:45:07,728 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:45:07,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:07,733 INFO L225 Difference]: With dead ends: 5221 [2021-06-04 21:45:07,733 INFO L226 Difference]: Without dead ends: 4951 [2021-06-04 21:45:07,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1079.9ms TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:45:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-04 21:45:07,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 4228. [2021-06-04 21:45:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:07,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-04 21:45:07,774 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-04 21:45:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:07,774 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-04 21:45:07,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-04 21:45:07,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:45:07,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:07,777 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:07,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-04 21:45:07,978 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:07,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:07,978 INFO L82 PathProgramCache]: Analyzing trace with hash -271206543, now seen corresponding path program 203 times [2021-06-04 21:45:07,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:07,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518370244] [2021-06-04 21:45:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:08,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:08,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518370244] [2021-06-04 21:45:08,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518370244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:08,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784760767] [2021-06-04 21:45:08,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:08,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:45:08,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:08,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:45:08,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:08,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784760767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:08,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:08,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:45:08,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666071624] [2021-06-04 21:45:08,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:45:08,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:08,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:45:08,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:45:08,624 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:10,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:10,072 INFO L93 Difference]: Finished difference Result 5679 states and 15263 transitions. [2021-06-04 21:45:10,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:45:10,072 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:45:10,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:10,077 INFO L225 Difference]: With dead ends: 5679 [2021-06-04 21:45:10,077 INFO L226 Difference]: Without dead ends: 5056 [2021-06-04 21:45:10,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 1412.0ms TimeCoverageRelationStatistics Valid=1256, Invalid=3574, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:45:10,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5056 states. [2021-06-04 21:45:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5056 to 4138. [2021-06-04 21:45:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 2.8155668358714045) internal successors, (11648), 4137 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11648 transitions. [2021-06-04 21:45:10,121 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11648 transitions. Word has length 130 [2021-06-04 21:45:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:10,121 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11648 transitions. [2021-06-04 21:45:10,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11648 transitions. [2021-06-04 21:45:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:45:10,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:10,125 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:10,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-04 21:45:10,326 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:10,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:10,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1303854145, now seen corresponding path program 204 times [2021-06-04 21:45:10,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:10,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586392145] [2021-06-04 21:45:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:10,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:10,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586392145] [2021-06-04 21:45:10,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586392145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:10,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506299278] [2021-06-04 21:45:10,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:10,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:45:10,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:10,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:10,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:10,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506299278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:10,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:10,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:45:10,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312155559] [2021-06-04 21:45:10,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:45:10,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:10,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:45:10,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:45:10,955 INFO L87 Difference]: Start difference. First operand 4138 states and 11648 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:12,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:12,115 INFO L93 Difference]: Finished difference Result 5908 states and 15981 transitions. [2021-06-04 21:45:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:45:12,115 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:45:12,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:12,120 INFO L225 Difference]: With dead ends: 5908 [2021-06-04 21:45:12,120 INFO L226 Difference]: Without dead ends: 5638 [2021-06-04 21:45:12,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1146.7ms TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:45:12,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-04 21:45:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4318. [2021-06-04 21:45:12,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4318 states, 4317 states have (on average 2.8276580958999307) internal successors, (12207), 4317 states have internal predecessors, (12207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:12,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 12207 transitions. [2021-06-04 21:45:12,163 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 12207 transitions. Word has length 130 [2021-06-04 21:45:12,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:12,163 INFO L482 AbstractCegarLoop]: Abstraction has 4318 states and 12207 transitions. [2021-06-04 21:45:12,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 12207 transitions. [2021-06-04 21:45:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:45:12,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:12,167 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:12,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-04 21:45:12,367 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:12,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:12,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1281510895, now seen corresponding path program 205 times [2021-06-04 21:45:12,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:12,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512741985] [2021-06-04 21:45:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:12,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:12,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512741985] [2021-06-04 21:45:12,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512741985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:12,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559195871] [2021-06-04 21:45:12,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:12,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:45:12,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:13,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559195871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:13,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:13,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:45:13,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119893381] [2021-06-04 21:45:13,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:45:13,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:13,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:45:13,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:45:13,030 INFO L87 Difference]: Start difference. First operand 4318 states and 12207 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:14,438 INFO L93 Difference]: Finished difference Result 5203 states and 14105 transitions. [2021-06-04 21:45:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:45:14,439 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:45:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:14,444 INFO L225 Difference]: With dead ends: 5203 [2021-06-04 21:45:14,444 INFO L226 Difference]: Without dead ends: 4831 [2021-06-04 21:45:14,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1397.9ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:45:14,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4831 states. [2021-06-04 21:45:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4831 to 4233. [2021-06-04 21:45:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 4232 states have (on average 2.81734404536862) internal successors, (11923), 4232 states have internal predecessors, (11923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 11923 transitions. [2021-06-04 21:45:14,513 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 11923 transitions. Word has length 130 [2021-06-04 21:45:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:14,513 INFO L482 AbstractCegarLoop]: Abstraction has 4233 states and 11923 transitions. [2021-06-04 21:45:14,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 11923 transitions. [2021-06-04 21:45:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:14,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:14,517 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:14,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-04 21:45:14,717 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:14,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1365615058, now seen corresponding path program 206 times [2021-06-04 21:45:14,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:14,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120727883] [2021-06-04 21:45:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 397 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:15,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:15,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120727883] [2021-06-04 21:45:15,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120727883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:15,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383995494] [2021-06-04 21:45:15,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:15,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:15,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:15,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:45:15,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:15,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383995494] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:45:15,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-04 21:45:15,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-06-04 21:45:15,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440379041] [2021-06-04 21:45:15,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:45:15,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:15,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:45:15,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:45:15,398 INFO L87 Difference]: Start difference. First operand 4233 states and 11923 transitions. Second operand has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:15,871 INFO L93 Difference]: Finished difference Result 19732 states and 54883 transitions. [2021-06-04 21:45:15,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:45:15,871 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:15,874 INFO L225 Difference]: With dead ends: 19732 [2021-06-04 21:45:15,874 INFO L226 Difference]: Without dead ends: 2029 [2021-06-04 21:45:15,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:45:15,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-06-04 21:45:15,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2029. [2021-06-04 21:45:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 2.5631163708086784) internal successors, (5198), 2028 states have internal predecessors, (5198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 5198 transitions. [2021-06-04 21:45:15,897 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 5198 transitions. Word has length 135 [2021-06-04 21:45:15,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:15,897 INFO L482 AbstractCegarLoop]: Abstraction has 2029 states and 5198 transitions. [2021-06-04 21:45:15,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:15,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 5198 transitions. [2021-06-04 21:45:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:15,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:15,899 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:16,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-04 21:45:16,122 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:16,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:16,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1607180635, now seen corresponding path program 207 times [2021-06-04 21:45:16,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:16,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143679610] [2021-06-04 21:45:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 406 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:16,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:16,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143679610] [2021-06-04 21:45:16,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143679610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:16,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347031216] [2021-06-04 21:45:16,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:16,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:45:16,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:16,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:45:16,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:16,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347031216] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:45:16,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-04 21:45:16,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-06-04 21:45:16,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330910208] [2021-06-04 21:45:16,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:45:16,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:16,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:45:16,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:45:16,788 INFO L87 Difference]: Start difference. First operand 2029 states and 5198 transitions. Second operand has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:17,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:17,199 INFO L93 Difference]: Finished difference Result 8213 states and 20540 transitions. [2021-06-04 21:45:17,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:45:17,199 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:17,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:17,200 INFO L225 Difference]: With dead ends: 8213 [2021-06-04 21:45:17,200 INFO L226 Difference]: Without dead ends: 0 [2021-06-04 21:45:17,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 521.5ms TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:45:17,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-04 21:45:17,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-04 21:45:17,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-04 21:45:17,200 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2021-06-04 21:45:17,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:17,200 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-04 21:45:17,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:17,201 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-04 21:45:17,201 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-04 21:45:17,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:17,402 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-04 21:45:17,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.06 09:45:17 BasicIcfg [2021-06-04 21:45:17,404 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-04 21:45:17,405 INFO L168 Benchmark]: Toolchain (without parser) took 303493.62 ms. Allocated memory was 358.6 MB in the beginning and 885.0 MB in the end (delta: 526.4 MB). Free memory was 321.0 MB in the beginning and 377.2 MB in the end (delta: -56.2 MB). Peak memory consumption was 470.4 MB. Max. memory is 16.0 GB. [2021-06-04 21:45:17,405 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 358.6 MB. Free memory was 339.1 MB in the beginning and 339.1 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-04 21:45:17,405 INFO L168 Benchmark]: CACSL2BoogieTranslator took 507.35 ms. Allocated memory is still 358.6 MB. Free memory was 320.8 MB in the beginning and 321.9 MB in the end (delta: -1.1 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. [2021-06-04 21:45:17,405 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.36 ms. Allocated memory is still 358.6 MB. Free memory was 321.9 MB in the beginning and 320.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-04 21:45:17,405 INFO L168 Benchmark]: Boogie Preprocessor took 32.99 ms. Allocated memory is still 358.6 MB. Free memory was 320.3 MB in the beginning and 319.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-04 21:45:17,405 INFO L168 Benchmark]: RCFGBuilder took 393.04 ms. Allocated memory is still 358.6 MB. Free memory was 318.2 MB in the beginning and 297.2 MB in the end (delta: 20.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-06-04 21:45:17,405 INFO L168 Benchmark]: TraceAbstraction took 302502.98 ms. Allocated memory was 358.6 MB in the beginning and 885.0 MB in the end (delta: 526.4 MB). Free memory was 296.2 MB in the beginning and 377.2 MB in the end (delta: -81.1 MB). Peak memory consumption was 446.4 MB. Max. memory is 16.0 GB. [2021-06-04 21:45:17,406 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 358.6 MB. Free memory was 339.1 MB in the beginning and 339.1 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 507.35 ms. Allocated memory is still 358.6 MB. Free memory was 320.8 MB in the beginning and 321.9 MB in the end (delta: -1.1 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 49.36 ms. Allocated memory is still 358.6 MB. Free memory was 321.9 MB in the beginning and 320.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 32.99 ms. Allocated memory is still 358.6 MB. Free memory was 320.3 MB in the beginning and 319.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 393.04 ms. Allocated memory is still 358.6 MB. Free memory was 318.2 MB in the beginning and 297.2 MB in the end (delta: 20.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 302502.98 ms. Allocated memory was 358.6 MB in the beginning and 885.0 MB in the end (delta: 526.4 MB). Free memory was 296.2 MB in the beginning and 377.2 MB in the end (delta: -81.1 MB). Peak memory consumption was 446.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 302380.7ms, OverallIterations: 216, TraceHistogramMax: 11, EmptinessCheckTime: 523.2ms, AutomataDifference: 141384.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 100.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21211 SDtfs, 160301 SDslu, 179507 SDs, 0 SdLazy, 32476 SolverSat, 23964 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27408.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29974 GetRequests, 20942 SyntacticMatches, 0 SemanticMatches, 9032 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97727 ImplicationChecksByTransitivity, 143131.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4318occurred in iteration=213, InterpolantAutomatonStates: 6731, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6975.0ms AutomataMinimizationTime, 216 MinimizatonAttempts, 175122 StatesRemovedByMinimization, 214 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3589.4ms SsaConstructionTime, 7341.5ms SatisfiabilityAnalysisTime, 89238.2ms InterpolantComputationTime, 42018 NumberOfCodeBlocks, 42018 NumberOfCodeBlocksAsserted, 1201 NumberOfCheckSat, 41592 ConstructedInterpolants, 0 QuantifiedInterpolants, 171420 SizeOfPredicates, 3134 NumberOfNonLiveVariables, 43512 ConjunctsInSsa, 4179 ConjunctsInUnsatCore, 426 InterpolantComputations, 8 PerfectInterpolantSequences, 1690/83616 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...