/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 15:12:00,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 15:12:00,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 15:12:00,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 15:12:00,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 15:12:00,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 15:12:00,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 15:12:00,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 15:12:00,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 15:12:00,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 15:12:00,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 15:12:00,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 15:12:00,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 15:12:00,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 15:12:00,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 15:12:00,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 15:12:00,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 15:12:00,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 15:12:00,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 15:12:00,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 15:12:00,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 15:12:00,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 15:12:00,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 15:12:00,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 15:12:00,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-11 15:12:00,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-11 15:12:00,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-11 15:12:00,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-11 15:12:00,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-11 15:12:00,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-11 15:12:00,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 15:12:00,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 15:12:00,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 15:12:00,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 15:12:00,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 15:12:00,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 15:12:00,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 15:12:00,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 15:12:00,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 15:12:00,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 15:12:00,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 15:12:00,616 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 [2020-11-11 15:12:00,645 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 15:12:00,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 15:12:00,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 15:12:00,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 15:12:00,648 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 15:12:00,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 15:12:00,648 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 15:12:00,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 15:12:00,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 15:12:00,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 15:12:00,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 15:12:00,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 15:12:00,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 15:12:00,650 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 15:12:00,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 15:12:00,651 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 15:12:00,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 15:12:00,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 15:12:00,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 15:12:00,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 15:12:00,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 15:12:00,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 15:12:00,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 15:12:00,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 15:12:00,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 15:12:00,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 15:12:00,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 15:12:00,654 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-11 15:12:00,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 15:12:00,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 15:12:01,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 15:12:01,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 15:12:01,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 15:12:01,151 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 15:12:01,152 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 15:12:01,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-11-11 15:12:01,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8083ed9a8/badd15696951496492175050c9ed3adb/FLAG5af0e3a3e [2020-11-11 15:12:01,952 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 15:12:01,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-11-11 15:12:01,977 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8083ed9a8/badd15696951496492175050c9ed3adb/FLAG5af0e3a3e [2020-11-11 15:12:02,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8083ed9a8/badd15696951496492175050c9ed3adb [2020-11-11 15:12:02,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 15:12:02,256 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 15:12:02,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 15:12:02,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 15:12:02,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 15:12:02,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:12:02" (1/1) ... [2020-11-11 15:12:02,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d9c83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:02, skipping insertion in model container [2020-11-11 15:12:02,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:12:02" (1/1) ... [2020-11-11 15:12:02,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 15:12:02,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 15:12:02,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 15:12:02,883 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 15:12:02,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 15:12:03,099 INFO L208 MainTranslator]: Completed translation [2020-11-11 15:12:03,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:03 WrapperNode [2020-11-11 15:12:03,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 15:12:03,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 15:12:03,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 15:12:03,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 15:12:03,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:03" (1/1) ... [2020-11-11 15:12:03,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:03" (1/1) ... [2020-11-11 15:12:03,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 15:12:03,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 15:12:03,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 15:12:03,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 15:12:03,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:03" (1/1) ... [2020-11-11 15:12:03,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:03" (1/1) ... [2020-11-11 15:12:03,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:03" (1/1) ... [2020-11-11 15:12:03,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:03" (1/1) ... [2020-11-11 15:12:03,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:03" (1/1) ... [2020-11-11 15:12:03,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:03" (1/1) ... [2020-11-11 15:12:03,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:03" (1/1) ... [2020-11-11 15:12:03,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 15:12:03,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 15:12:03,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 15:12:03,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 15:12:03,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:03" (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 [2020-11-11 15:12:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 15:12:03,361 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 15:12:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 15:12:03,362 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 15:12:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 15:12:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 15:12:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 15:12:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 15:12:03,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 15:12:03,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 15:12:03,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 15:12:03,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 15:12:03,365 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 15:12:03,849 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 15:12:03,849 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 15:12:03,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:12:03 BoogieIcfgContainer [2020-11-11 15:12:03,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 15:12:03,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 15:12:03,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 15:12:03,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 15:12:03,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 03:12:02" (1/3) ... [2020-11-11 15:12:03,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309133b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:12:03, skipping insertion in model container [2020-11-11 15:12:03,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:03" (2/3) ... [2020-11-11 15:12:03,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309133b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:12:03, skipping insertion in model container [2020-11-11 15:12:03,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:12:03" (3/3) ... [2020-11-11 15:12:03,861 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-11-11 15:12:03,879 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 15:12:03,879 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 15:12:03,884 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 15:12:03,885 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 15:12:03,923 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,923 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,923 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,923 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,924 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,924 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,924 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,924 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,925 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,925 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,925 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,925 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,926 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,926 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,926 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,926 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,927 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,927 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,927 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,928 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,928 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,929 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,930 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,930 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,930 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,930 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,930 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,930 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,931 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,931 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,931 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,931 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,932 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,932 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,932 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,932 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,932 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,933 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,933 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,933 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,933 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,934 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,934 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,934 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,934 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,934 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,935 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,935 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,935 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,937 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,938 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,938 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,938 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,938 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,939 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,945 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,946 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,946 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,946 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,946 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,946 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,951 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 15:12:03,964 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 15:12:03,989 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 15:12:03,989 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 15:12:03,990 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 15:12:03,990 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 15:12:03,990 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 15:12:03,990 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 15:12:03,990 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 15:12:03,990 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 15:12:04,002 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2020-11-11 15:12:04,137 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:04,147 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-11 15:12:04,163 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:04,164 INFO L494 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] [2020-11-11 15:12:04,165 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:04,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:04,171 INFO L82 PathProgramCache]: Analyzing trace with hash 27863943, now seen corresponding path program 1 times [2020-11-11 15:12:04,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:04,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255174417] [2020-11-11 15:12:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:04,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255174417] [2020-11-11 15:12:04,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:04,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:12:04,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117758446] [2020-11-11 15:12:04,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:12:04,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:04,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:12:04,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:12:04,708 INFO L87 Difference]: Start difference. First operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:05,013 INFO L93 Difference]: Finished difference Result 3336 states and 9728 transitions. [2020-11-11 15:12:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 15:12:05,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2020-11-11 15:12:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:05,061 INFO L225 Difference]: With dead ends: 3336 [2020-11-11 15:12:05,068 INFO L226 Difference]: Without dead ends: 1320 [2020-11-11 15:12:05,071 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:12:05,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2020-11-11 15:12:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 808. [2020-11-11 15:12:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.7732342007434942) internal successors, (2238), 807 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2238 transitions. [2020-11-11 15:12:05,245 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2238 transitions. Word has length 28 [2020-11-11 15:12:05,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:05,245 INFO L481 AbstractCegarLoop]: Abstraction has 808 states and 2238 transitions. [2020-11-11 15:12:05,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:05,246 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2238 transitions. [2020-11-11 15:12:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-11 15:12:05,255 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:05,255 INFO L494 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] [2020-11-11 15:12:05,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 15:12:05,256 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:05,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1417635940, now seen corresponding path program 1 times [2020-11-11 15:12:05,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:05,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130246963] [2020-11-11 15:12:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:05,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130246963] [2020-11-11 15:12:05,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:05,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:12:05,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766808393] [2020-11-11 15:12:05,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:12:05,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:05,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:12:05,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:12:05,463 INFO L87 Difference]: Start difference. First operand 808 states and 2238 transitions. 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) [2020-11-11 15:12:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:05,635 INFO L93 Difference]: Finished difference Result 2107 states and 5756 transitions. [2020-11-11 15:12:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 15:12:05,636 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 [2020-11-11 15:12:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:05,651 INFO L225 Difference]: With dead ends: 2107 [2020-11-11 15:12:05,651 INFO L226 Difference]: Without dead ends: 1851 [2020-11-11 15:12:05,652 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:12:05,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2020-11-11 15:12:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 982. [2020-11-11 15:12:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.7533129459734966) internal successors, (2701), 981 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2701 transitions. [2020-11-11 15:12:05,715 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2701 transitions. Word has length 32 [2020-11-11 15:12:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:05,716 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 2701 transitions. [2020-11-11 15:12:05,716 INFO L482 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) [2020-11-11 15:12:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2701 transitions. [2020-11-11 15:12:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-11 15:12:05,718 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:05,719 INFO L494 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] [2020-11-11 15:12:05,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 15:12:05,719 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:05,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1368897688, now seen corresponding path program 2 times [2020-11-11 15:12:05,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:05,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048016484] [2020-11-11 15:12:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:05,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048016484] [2020-11-11 15:12:05,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:05,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:12:05,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764657571] [2020-11-11 15:12:05,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:12:05,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:05,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:12:05,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:12:05,943 INFO L87 Difference]: Start difference. First operand 982 states and 2701 transitions. 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) [2020-11-11 15:12:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:06,163 INFO L93 Difference]: Finished difference Result 1227 states and 3221 transitions. [2020-11-11 15:12:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 15:12:06,164 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 [2020-11-11 15:12:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:06,171 INFO L225 Difference]: With dead ends: 1227 [2020-11-11 15:12:06,171 INFO L226 Difference]: Without dead ends: 902 [2020-11-11 15:12:06,171 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:12:06,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2020-11-11 15:12:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 810. [2020-11-11 15:12:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 2.7169344870210135) internal successors, (2198), 809 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:06,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2198 transitions. [2020-11-11 15:12:06,204 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2198 transitions. Word has length 32 [2020-11-11 15:12:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:06,204 INFO L481 AbstractCegarLoop]: Abstraction has 810 states and 2198 transitions. [2020-11-11 15:12:06,204 INFO L482 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) [2020-11-11 15:12:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2198 transitions. [2020-11-11 15:12:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:12:06,207 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:06,207 INFO L494 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] [2020-11-11 15:12:06,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 15:12:06,207 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:06,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:06,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1044457191, now seen corresponding path program 1 times [2020-11-11 15:12:06,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:06,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279084352] [2020-11-11 15:12:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:06,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279084352] [2020-11-11 15:12:06,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:06,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-11 15:12:06,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789481375] [2020-11-11 15:12:06,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 15:12:06,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:06,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 15:12:06,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-11 15:12:06,466 INFO L87 Difference]: Start difference. First operand 810 states and 2198 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2020-11-11 15:12:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:06,722 INFO L93 Difference]: Finished difference Result 1698 states and 4550 transitions. [2020-11-11 15:12:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:12:06,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 [2020-11-11 15:12:06,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:06,733 INFO L225 Difference]: With dead ends: 1698 [2020-11-11 15:12:06,733 INFO L226 Difference]: Without dead ends: 1431 [2020-11-11 15:12:06,734 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2020-11-11 15:12:06,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 855. [2020-11-11 15:12:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 2.6814988290398127) internal successors, (2290), 854 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:06,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2290 transitions. [2020-11-11 15:12:06,776 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2290 transitions. Word has length 36 [2020-11-11 15:12:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:06,776 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 2290 transitions. [2020-11-11 15:12:06,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2020-11-11 15:12:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2290 transitions. [2020-11-11 15:12:06,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:12:06,779 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:06,779 INFO L494 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] [2020-11-11 15:12:06,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-11 15:12:06,779 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:06,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:06,780 INFO L82 PathProgramCache]: Analyzing trace with hash -2125654229, now seen corresponding path program 2 times [2020-11-11 15:12:06,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:06,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346677361] [2020-11-11 15:12:06,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:06,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346677361] [2020-11-11 15:12:06,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:06,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:12:06,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703378852] [2020-11-11 15:12:06,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:12:06,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:06,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:12:06,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:12:06,932 INFO L87 Difference]: Start difference. First operand 855 states and 2290 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2020-11-11 15:12:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:07,153 INFO L93 Difference]: Finished difference Result 1253 states and 3278 transitions. [2020-11-11 15:12:07,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 15:12:07,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 [2020-11-11 15:12:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:07,161 INFO L225 Difference]: With dead ends: 1253 [2020-11-11 15:12:07,161 INFO L226 Difference]: Without dead ends: 1029 [2020-11-11 15:12:07,162 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2020-11-11 15:12:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 899. [2020-11-11 15:12:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.714922048997773) internal successors, (2438), 898 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2438 transitions. [2020-11-11 15:12:07,198 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2438 transitions. Word has length 36 [2020-11-11 15:12:07,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:07,199 INFO L481 AbstractCegarLoop]: Abstraction has 899 states and 2438 transitions. [2020-11-11 15:12:07,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2020-11-11 15:12:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2438 transitions. [2020-11-11 15:12:07,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:12:07,201 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:07,201 INFO L494 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] [2020-11-11 15:12:07,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-11 15:12:07,202 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:07,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:07,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1451531371, now seen corresponding path program 3 times [2020-11-11 15:12:07,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:07,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575388124] [2020-11-11 15:12:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:07,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575388124] [2020-11-11 15:12:07,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:07,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:12:07,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427845592] [2020-11-11 15:12:07,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:12:07,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:07,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:12:07,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:12:07,317 INFO L87 Difference]: Start difference. First operand 899 states and 2438 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2020-11-11 15:12:07,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:07,507 INFO L93 Difference]: Finished difference Result 2449 states and 6632 transitions. [2020-11-11 15:12:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:12:07,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 [2020-11-11 15:12:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:07,524 INFO L225 Difference]: With dead ends: 2449 [2020-11-11 15:12:07,524 INFO L226 Difference]: Without dead ends: 2182 [2020-11-11 15:12:07,524 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2020-11-11 15:12:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1005. [2020-11-11 15:12:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 2.7739043824701195) internal successors, (2785), 1004 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 2785 transitions. [2020-11-11 15:12:07,585 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 2785 transitions. Word has length 36 [2020-11-11 15:12:07,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:07,585 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 2785 transitions. [2020-11-11 15:12:07,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2020-11-11 15:12:07,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 2785 transitions. [2020-11-11 15:12:07,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:12:07,588 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:07,588 INFO L494 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] [2020-11-11 15:12:07,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-11 15:12:07,588 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:07,589 INFO L82 PathProgramCache]: Analyzing trace with hash 259676583, now seen corresponding path program 4 times [2020-11-11 15:12:07,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:07,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599362573] [2020-11-11 15:12:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:07,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599362573] [2020-11-11 15:12:07,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:07,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:12:07,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896639389] [2020-11-11 15:12:07,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:12:07,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:07,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:12:07,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:12:07,727 INFO L87 Difference]: Start difference. First operand 1005 states and 2785 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2020-11-11 15:12:08,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:08,007 INFO L93 Difference]: Finished difference Result 1373 states and 3633 transitions. [2020-11-11 15:12:08,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:12:08,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 [2020-11-11 15:12:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:08,017 INFO L225 Difference]: With dead ends: 1373 [2020-11-11 15:12:08,018 INFO L226 Difference]: Without dead ends: 1037 [2020-11-11 15:12:08,019 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2020-11-11 15:12:08,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 932. [2020-11-11 15:12:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 2.740064446831364) internal successors, (2551), 931 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2551 transitions. [2020-11-11 15:12:08,062 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2551 transitions. Word has length 36 [2020-11-11 15:12:08,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:08,063 INFO L481 AbstractCegarLoop]: Abstraction has 932 states and 2551 transitions. [2020-11-11 15:12:08,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2020-11-11 15:12:08,063 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2551 transitions. [2020-11-11 15:12:08,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:12:08,066 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:08,067 INFO L494 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] [2020-11-11 15:12:08,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-11 15:12:08,067 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:08,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:08,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1144099044, now seen corresponding path program 1 times [2020-11-11 15:12:08,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:08,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823283864] [2020-11-11 15:12:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:08,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823283864] [2020-11-11 15:12:08,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313347900] [2020-11-11 15:12:08,274 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 [2020-11-11 15:12:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:08,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:12:08,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:08,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:08,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:08,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-11 15:12:08,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055593488] [2020-11-11 15:12:08,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 15:12:08,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 15:12:08,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-11 15:12:08,447 INFO L87 Difference]: Start difference. First operand 932 states and 2551 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:08,589 INFO L93 Difference]: Finished difference Result 1330 states and 3475 transitions. [2020-11-11 15:12:08,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:12:08,590 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2020-11-11 15:12:08,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:08,597 INFO L225 Difference]: With dead ends: 1330 [2020-11-11 15:12:08,597 INFO L226 Difference]: Without dead ends: 1060 [2020-11-11 15:12:08,597 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2020-11-11 15:12:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 977. [2020-11-11 15:12:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.7059426229508197) internal successors, (2641), 976 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2641 transitions. [2020-11-11 15:12:08,635 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2641 transitions. Word has length 41 [2020-11-11 15:12:08,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:08,636 INFO L481 AbstractCegarLoop]: Abstraction has 977 states and 2641 transitions. [2020-11-11 15:12:08,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2641 transitions. [2020-11-11 15:12:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:12:08,638 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:08,638 INFO L494 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] [2020-11-11 15:12:08,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-11 15:12:08,853 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash 988054880, now seen corresponding path program 2 times [2020-11-11 15:12:08,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:08,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146531976] [2020-11-11 15:12:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:08,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146531976] [2020-11-11 15:12:08,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996602530] [2020-11-11 15:12:08,985 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 [2020-11-11 15:12:09,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:09,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:09,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:12:09,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:09,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:09,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:09,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:09,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 15:12:09,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263107259] [2020-11-11 15:12:09,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 15:12:09,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:09,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 15:12:09,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:12:09,115 INFO L87 Difference]: Start difference. First operand 977 states and 2641 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:09,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:09,353 INFO L93 Difference]: Finished difference Result 1460 states and 3735 transitions. [2020-11-11 15:12:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 15:12:09,354 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 41 [2020-11-11 15:12:09,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:09,362 INFO L225 Difference]: With dead ends: 1460 [2020-11-11 15:12:09,366 INFO L226 Difference]: Without dead ends: 1190 [2020-11-11 15:12:09,367 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:12:09,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2020-11-11 15:12:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 982. [2020-11-11 15:12:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.7074413863404687) internal successors, (2656), 981 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:09,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2656 transitions. [2020-11-11 15:12:09,406 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2656 transitions. Word has length 41 [2020-11-11 15:12:09,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:09,407 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 2656 transitions. [2020-11-11 15:12:09,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2656 transitions. [2020-11-11 15:12:09,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:12:09,410 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:09,411 INFO L494 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] [2020-11-11 15:12:09,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:09,625 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:09,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1616846382, now seen corresponding path program 3 times [2020-11-11 15:12:09,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:09,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37956058] [2020-11-11 15:12:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:09,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37956058] [2020-11-11 15:12:09,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598512066] [2020-11-11 15:12:09,768 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 [2020-11-11 15:12:09,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 15:12:09,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:09,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:12:09,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:09,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:09,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:09,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-11 15:12:09,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878127630] [2020-11-11 15:12:09,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 15:12:09,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:09,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 15:12:09,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-11 15:12:09,894 INFO L87 Difference]: Start difference. First operand 982 states and 2656 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:10,117 INFO L93 Difference]: Finished difference Result 2552 states and 6879 transitions. [2020-11-11 15:12:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 15:12:10,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2020-11-11 15:12:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:10,133 INFO L225 Difference]: With dead ends: 2552 [2020-11-11 15:12:10,134 INFO L226 Difference]: Without dead ends: 2282 [2020-11-11 15:12:10,134 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:12:10,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2020-11-11 15:12:10,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1077. [2020-11-11 15:12:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 2.757434944237918) internal successors, (2967), 1076 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:10,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2967 transitions. [2020-11-11 15:12:10,186 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2967 transitions. Word has length 41 [2020-11-11 15:12:10,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:10,187 INFO L481 AbstractCegarLoop]: Abstraction has 1077 states and 2967 transitions. [2020-11-11 15:12:10,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:10,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2967 transitions. [2020-11-11 15:12:10,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:12:10,189 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:10,189 INFO L494 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] [2020-11-11 15:12:10,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-11 15:12:10,405 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:10,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:10,408 INFO L82 PathProgramCache]: Analyzing trace with hash -966912960, now seen corresponding path program 4 times [2020-11-11 15:12:10,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:10,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799213455] [2020-11-11 15:12:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:10,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799213455] [2020-11-11 15:12:10,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811677640] [2020-11-11 15:12:10,528 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 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 [2020-11-11 15:12:10,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:10,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:10,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:12:10,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:10,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:10,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:10,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:10,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 15:12:10,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226169626] [2020-11-11 15:12:10,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 15:12:10,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:10,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 15:12:10,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:12:10,722 INFO L87 Difference]: Start difference. First operand 1077 states and 2967 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:11,097 INFO L93 Difference]: Finished difference Result 1616 states and 4285 transitions. [2020-11-11 15:12:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 15:12:11,097 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 41 [2020-11-11 15:12:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:11,106 INFO L225 Difference]: With dead ends: 1616 [2020-11-11 15:12:11,106 INFO L226 Difference]: Without dead ends: 1205 [2020-11-11 15:12:11,107 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2020-11-11 15:12:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1057. [2020-11-11 15:12:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.747159090909091) internal successors, (2901), 1056 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:11,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 2901 transitions. [2020-11-11 15:12:11,158 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 2901 transitions. Word has length 41 [2020-11-11 15:12:11,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:11,158 INFO L481 AbstractCegarLoop]: Abstraction has 1057 states and 2901 transitions. [2020-11-11 15:12:11,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 2901 transitions. [2020-11-11 15:12:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:12:11,161 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:11,161 INFO L494 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] [2020-11-11 15:12:11,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:11,376 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:11,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:11,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2116060661, now seen corresponding path program 1 times [2020-11-11 15:12:11,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:11,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069290519] [2020-11-11 15:12:11,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:11,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069290519] [2020-11-11 15:12:11,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193864350] [2020-11-11 15:12:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-11 15:12:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:11,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:12:11,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:11,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:11,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:11,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:11,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 15:12:11,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837678896] [2020-11-11 15:12:11,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 15:12:11,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:11,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 15:12:11,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:12:11,639 INFO L87 Difference]: Start difference. First operand 1057 states and 2901 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:11,838 INFO L93 Difference]: Finished difference Result 1460 states and 3899 transitions. [2020-11-11 15:12:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:12:11,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 41 [2020-11-11 15:12:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:11,847 INFO L225 Difference]: With dead ends: 1460 [2020-11-11 15:12:11,848 INFO L226 Difference]: Without dead ends: 1230 [2020-11-11 15:12:11,848 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:11,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2020-11-11 15:12:11,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 941. [2020-11-11 15:12:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 2.7319148936170214) internal successors, (2568), 940 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2568 transitions. [2020-11-11 15:12:11,882 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2568 transitions. Word has length 41 [2020-11-11 15:12:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:11,883 INFO L481 AbstractCegarLoop]: Abstraction has 941 states and 2568 transitions. [2020-11-11 15:12:11,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2568 transitions. [2020-11-11 15:12:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:12:11,886 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:11,886 INFO L494 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] [2020-11-11 15:12:12,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-11 15:12:12,102 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:12,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:12,102 INFO L82 PathProgramCache]: Analyzing trace with hash -226684744, now seen corresponding path program 1 times [2020-11-11 15:12:12,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:12,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058577806] [2020-11-11 15:12:12,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:12,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058577806] [2020-11-11 15:12:12,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857394530] [2020-11-11 15:12:12,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-11 15:12:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:12,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:12:12,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:12,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:12,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:12,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:12,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-11-11 15:12:12,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252211947] [2020-11-11 15:12:12,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:12:12,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:12,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:12:12,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:12,445 INFO L87 Difference]: Start difference. First operand 941 states and 2568 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:12,778 INFO L93 Difference]: Finished difference Result 1809 states and 4752 transitions. [2020-11-11 15:12:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:12:12,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 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 46 [2020-11-11 15:12:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:12,793 INFO L225 Difference]: With dead ends: 1809 [2020-11-11 15:12:12,794 INFO L226 Difference]: Without dead ends: 1475 [2020-11-11 15:12:12,797 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:12:12,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2020-11-11 15:12:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1026. [2020-11-11 15:12:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 2.671219512195122) internal successors, (2738), 1025 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 2738 transitions. [2020-11-11 15:12:12,842 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 2738 transitions. Word has length 46 [2020-11-11 15:12:12,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:12,843 INFO L481 AbstractCegarLoop]: Abstraction has 1026 states and 2738 transitions. [2020-11-11 15:12:12,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 2738 transitions. [2020-11-11 15:12:12,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:12:12,845 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:12,845 INFO L494 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] [2020-11-11 15:12:13,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:13,060 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:13,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:13,061 INFO L82 PathProgramCache]: Analyzing trace with hash -359805978, now seen corresponding path program 2 times [2020-11-11 15:12:13,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:13,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47050829] [2020-11-11 15:12:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:13,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47050829] [2020-11-11 15:12:13,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287443604] [2020-11-11 15:12:13,237 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 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 [2020-11-11 15:12:13,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:13,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:13,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:12:13,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:13,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:13,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:13,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 15:12:13,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036064521] [2020-11-11 15:12:13,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:12:13,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:13,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:12:13,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:12:13,363 INFO L87 Difference]: Start difference. First operand 1026 states and 2738 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) [2020-11-11 15:12:13,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:13,592 INFO L93 Difference]: Finished difference Result 1760 states and 4420 transitions. [2020-11-11 15:12:13,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 15:12:13,593 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 46 [2020-11-11 15:12:13,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:13,597 INFO L225 Difference]: With dead ends: 1760 [2020-11-11 15:12:13,598 INFO L226 Difference]: Without dead ends: 1490 [2020-11-11 15:12:13,598 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:13,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2020-11-11 15:12:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1127. [2020-11-11 15:12:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.6873889875666075) internal successors, (3026), 1126 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3026 transitions. [2020-11-11 15:12:13,637 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3026 transitions. Word has length 46 [2020-11-11 15:12:13,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:13,637 INFO L481 AbstractCegarLoop]: Abstraction has 1127 states and 3026 transitions. [2020-11-11 15:12:13,637 INFO L482 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) [2020-11-11 15:12:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3026 transitions. [2020-11-11 15:12:13,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:12:13,640 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:13,640 INFO L494 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] [2020-11-11 15:12:13,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-11 15:12:13,854 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:13,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:13,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1471726806, now seen corresponding path program 3 times [2020-11-11 15:12:13,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:13,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086089864] [2020-11-11 15:12:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:14,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086089864] [2020-11-11 15:12:14,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178730267] [2020-11-11 15:12:14,014 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 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 [2020-11-11 15:12:14,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 15:12:14,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:14,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:12:14,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:14,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:14,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:14,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:14,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-11-11 15:12:14,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659948099] [2020-11-11 15:12:14,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:12:14,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:14,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:12:14,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:12:14,191 INFO L87 Difference]: Start difference. First operand 1127 states and 3026 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 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) [2020-11-11 15:12:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:14,503 INFO L93 Difference]: Finished difference Result 1740 states and 4460 transitions. [2020-11-11 15:12:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:12:14,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 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 46 [2020-11-11 15:12:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:14,509 INFO L225 Difference]: With dead ends: 1740 [2020-11-11 15:12:14,509 INFO L226 Difference]: Without dead ends: 1470 [2020-11-11 15:12:14,509 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:12:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2020-11-11 15:12:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1177. [2020-11-11 15:12:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 2.7134353741496597) internal successors, (3191), 1176 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 3191 transitions. [2020-11-11 15:12:14,546 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 3191 transitions. Word has length 46 [2020-11-11 15:12:14,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:14,546 INFO L481 AbstractCegarLoop]: Abstraction has 1177 states and 3191 transitions. [2020-11-11 15:12:14,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 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) [2020-11-11 15:12:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 3191 transitions. [2020-11-11 15:12:14,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:12:14,549 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:14,550 INFO L494 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] [2020-11-11 15:12:14,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 15:12:14,765 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:14,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:14,767 INFO L82 PathProgramCache]: Analyzing trace with hash 2100518308, now seen corresponding path program 4 times [2020-11-11 15:12:14,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:14,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734836996] [2020-11-11 15:12:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:14,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734836996] [2020-11-11 15:12:14,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655173001] [2020-11-11 15:12:14,877 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 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 [2020-11-11 15:12:14,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:14,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:14,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:12:14,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:15,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:15,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:15,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 15:12:15,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113606695] [2020-11-11 15:12:15,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:12:15,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:15,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:12:15,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:12:15,033 INFO L87 Difference]: Start difference. First operand 1177 states and 3191 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) [2020-11-11 15:12:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:15,298 INFO L93 Difference]: Finished difference Result 2852 states and 7644 transitions. [2020-11-11 15:12:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 15:12:15,298 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 46 [2020-11-11 15:12:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:15,306 INFO L225 Difference]: With dead ends: 2852 [2020-11-11 15:12:15,306 INFO L226 Difference]: Without dead ends: 2582 [2020-11-11 15:12:15,307 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2020-11-11 15:12:15,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 1302. [2020-11-11 15:12:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 2.7532667179093004) internal successors, (3582), 1301 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 3582 transitions. [2020-11-11 15:12:15,358 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 3582 transitions. Word has length 46 [2020-11-11 15:12:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:15,358 INFO L481 AbstractCegarLoop]: Abstraction has 1302 states and 3582 transitions. [2020-11-11 15:12:15,359 INFO L482 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) [2020-11-11 15:12:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 3582 transitions. [2020-11-11 15:12:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:12:15,361 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:15,362 INFO L494 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] [2020-11-11 15:12:15,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 15:12:15,575 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:15,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:15,576 INFO L82 PathProgramCache]: Analyzing trace with hash -483241034, now seen corresponding path program 5 times [2020-11-11 15:12:15,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:15,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882004031] [2020-11-11 15:12:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:15,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882004031] [2020-11-11 15:12:15,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382646312] [2020-11-11 15:12:15,753 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 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 [2020-11-11 15:12:15,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 15:12:15,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:15,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:12:15,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:15,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:15,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:15,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:15,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-11-11 15:12:15,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873768629] [2020-11-11 15:12:15,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:12:15,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:15,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:12:15,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:12:15,894 INFO L87 Difference]: Start difference. First operand 1302 states and 3582 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:16,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:16,432 INFO L93 Difference]: Finished difference Result 2307 states and 6040 transitions. [2020-11-11 15:12:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:12:16,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 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 46 [2020-11-11 15:12:16,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:16,437 INFO L225 Difference]: With dead ends: 2307 [2020-11-11 15:12:16,437 INFO L226 Difference]: Without dead ends: 1780 [2020-11-11 15:12:16,438 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:12:16,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2020-11-11 15:12:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1312. [2020-11-11 15:12:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 2.7353165522501905) internal successors, (3586), 1311 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 3586 transitions. [2020-11-11 15:12:16,479 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 3586 transitions. Word has length 46 [2020-11-11 15:12:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:16,479 INFO L481 AbstractCegarLoop]: Abstraction has 1312 states and 3586 transitions. [2020-11-11 15:12:16,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 3586 transitions. [2020-11-11 15:12:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:12:16,482 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:16,482 INFO L494 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] [2020-11-11 15:12:16,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 15:12:16,696 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:16,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash -935339201, now seen corresponding path program 6 times [2020-11-11 15:12:16,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:16,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424845260] [2020-11-11 15:12:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:16,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424845260] [2020-11-11 15:12:16,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485651429] [2020-11-11 15:12:16,831 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 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 [2020-11-11 15:12:16,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 15:12:16,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:12:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:16,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:16,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:16,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-11 15:12:16,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047141780] [2020-11-11 15:12:16,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:12:16,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:16,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:12:16,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:12:16,933 INFO L87 Difference]: Start difference. First operand 1312 states and 3586 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:17,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:17,211 INFO L93 Difference]: Finished difference Result 1855 states and 4800 transitions. [2020-11-11 15:12:17,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:12:17,211 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2020-11-11 15:12:17,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:17,216 INFO L225 Difference]: With dead ends: 1855 [2020-11-11 15:12:17,216 INFO L226 Difference]: Without dead ends: 1585 [2020-11-11 15:12:17,216 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:17,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2020-11-11 15:12:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1312. [2020-11-11 15:12:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 2.7353165522501905) internal successors, (3586), 1311 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 3586 transitions. [2020-11-11 15:12:17,254 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 3586 transitions. Word has length 51 [2020-11-11 15:12:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:17,255 INFO L481 AbstractCegarLoop]: Abstraction has 1312 states and 3586 transitions. [2020-11-11 15:12:17,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 3586 transitions. [2020-11-11 15:12:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:12:17,258 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:17,258 INFO L494 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] [2020-11-11 15:12:17,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 15:12:17,473 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:17,474 INFO L82 PathProgramCache]: Analyzing trace with hash 896193583, now seen corresponding path program 7 times [2020-11-11 15:12:17,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:17,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017324413] [2020-11-11 15:12:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:17,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017324413] [2020-11-11 15:12:17,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819412313] [2020-11-11 15:12:17,648 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 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 [2020-11-11 15:12:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:17,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:12:17,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:17,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:17,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:17,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:17,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:12:17,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67792863] [2020-11-11 15:12:17,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:12:17,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:17,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:12:17,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:12:17,781 INFO L87 Difference]: Start difference. First operand 1312 states and 3586 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:18,181 INFO L93 Difference]: Finished difference Result 1945 states and 5000 transitions. [2020-11-11 15:12:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:12:18,181 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2020-11-11 15:12:18,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:18,187 INFO L225 Difference]: With dead ends: 1945 [2020-11-11 15:12:18,187 INFO L226 Difference]: Without dead ends: 1675 [2020-11-11 15:12:18,187 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:12:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2020-11-11 15:12:18,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1312. [2020-11-11 15:12:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 2.739130434782609) internal successors, (3591), 1311 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:18,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 3591 transitions. [2020-11-11 15:12:18,227 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 3591 transitions. Word has length 51 [2020-11-11 15:12:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:18,227 INFO L481 AbstractCegarLoop]: Abstraction has 1312 states and 3591 transitions. [2020-11-11 15:12:18,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 3591 transitions. [2020-11-11 15:12:18,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:12:18,230 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:18,230 INFO L494 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] [2020-11-11 15:12:18,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:18,443 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:18,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:18,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1524985085, now seen corresponding path program 8 times [2020-11-11 15:12:18,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:18,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144487378] [2020-11-11 15:12:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:18,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144487378] [2020-11-11 15:12:18,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910676990] [2020-11-11 15:12:18,572 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 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 [2020-11-11 15:12:18,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:18,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:18,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:12:18,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:18,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:18,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:18,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-11 15:12:18,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517058640] [2020-11-11 15:12:18,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:12:18,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:18,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:12:18,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:12:18,708 INFO L87 Difference]: Start difference. First operand 1312 states and 3591 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:19,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:19,067 INFO L93 Difference]: Finished difference Result 3012 states and 8094 transitions. [2020-11-11 15:12:19,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:12:19,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2020-11-11 15:12:19,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:19,076 INFO L225 Difference]: With dead ends: 3012 [2020-11-11 15:12:19,076 INFO L226 Difference]: Without dead ends: 2742 [2020-11-11 15:12:19,077 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:12:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2020-11-11 15:12:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 1437. [2020-11-11 15:12:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 2.7729805013927575) internal successors, (3982), 1436 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3982 transitions. [2020-11-11 15:12:19,131 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3982 transitions. Word has length 51 [2020-11-11 15:12:19,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:19,131 INFO L481 AbstractCegarLoop]: Abstraction has 1437 states and 3982 transitions. [2020-11-11 15:12:19,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:19,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3982 transitions. [2020-11-11 15:12:19,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:12:19,134 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:19,134 INFO L494 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] [2020-11-11 15:12:19,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-11-11 15:12:19,349 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:19,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:19,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1058774257, now seen corresponding path program 9 times [2020-11-11 15:12:19,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:19,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218315514] [2020-11-11 15:12:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:19,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218315514] [2020-11-11 15:12:19,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070586953] [2020-11-11 15:12:19,503 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 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 [2020-11-11 15:12:19,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 15:12:19,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:19,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:12:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:19,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:19,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:19,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-11 15:12:19,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669679366] [2020-11-11 15:12:19,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:19,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:19,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:19,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:19,646 INFO L87 Difference]: Start difference. First operand 1437 states and 3982 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:20,248 INFO L93 Difference]: Finished difference Result 2407 states and 6340 transitions. [2020-11-11 15:12:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:12:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 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 51 [2020-11-11 15:12:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:20,254 INFO L225 Difference]: With dead ends: 2407 [2020-11-11 15:12:20,254 INFO L226 Difference]: Without dead ends: 1880 [2020-11-11 15:12:20,255 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:12:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2020-11-11 15:12:20,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1151. [2020-11-11 15:12:20,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 2.7113043478260868) internal successors, (3118), 1150 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 3118 transitions. [2020-11-11 15:12:20,288 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 3118 transitions. Word has length 51 [2020-11-11 15:12:20,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:20,289 INFO L481 AbstractCegarLoop]: Abstraction has 1151 states and 3118 transitions. [2020-11-11 15:12:20,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 3118 transitions. [2020-11-11 15:12:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:20,292 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:20,292 INFO L494 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] [2020-11-11 15:12:20,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:20,507 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:20,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1906333367, now seen corresponding path program 10 times [2020-11-11 15:12:20,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:20,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179499085] [2020-11-11 15:12:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:20,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179499085] [2020-11-11 15:12:20,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741103975] [2020-11-11 15:12:20,669 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 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 [2020-11-11 15:12:20,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:20,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:20,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:12:20,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:20,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:20,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:20,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:20,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2020-11-11 15:12:20,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246303781] [2020-11-11 15:12:20,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:20,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:20,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:20,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:20,832 INFO L87 Difference]: Start difference. First operand 1151 states and 3118 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 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) [2020-11-11 15:12:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:21,178 INFO L93 Difference]: Finished difference Result 2069 states and 5402 transitions. [2020-11-11 15:12:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:12:21,179 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 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 56 [2020-11-11 15:12:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:21,183 INFO L225 Difference]: With dead ends: 2069 [2020-11-11 15:12:21,183 INFO L226 Difference]: Without dead ends: 1735 [2020-11-11 15:12:21,184 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:12:21,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2020-11-11 15:12:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1236. [2020-11-11 15:12:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 2.662348178137652) internal successors, (3288), 1235 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3288 transitions. [2020-11-11 15:12:21,221 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3288 transitions. Word has length 56 [2020-11-11 15:12:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:21,221 INFO L481 AbstractCegarLoop]: Abstraction has 1236 states and 3288 transitions. [2020-11-11 15:12:21,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 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) [2020-11-11 15:12:21,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3288 transitions. [2020-11-11 15:12:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:21,223 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:21,224 INFO L494 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] [2020-11-11 15:12:21,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-11 15:12:21,426 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:21,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2112175369, now seen corresponding path program 11 times [2020-11-11 15:12:21,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:21,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571541004] [2020-11-11 15:12:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:21,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571541004] [2020-11-11 15:12:21,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025703719] [2020-11-11 15:12:21,624 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 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 [2020-11-11 15:12:21,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 15:12:21,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:21,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:12:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:21,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:21,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:21,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 15:12:21,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039091526] [2020-11-11 15:12:21,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:21,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:21,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:21,750 INFO L87 Difference]: Start difference. First operand 1236 states and 3288 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:21,993 INFO L93 Difference]: Finished difference Result 2120 states and 5270 transitions. [2020-11-11 15:12:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 15:12:21,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 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 56 [2020-11-11 15:12:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:21,999 INFO L225 Difference]: With dead ends: 2120 [2020-11-11 15:12:21,999 INFO L226 Difference]: Without dead ends: 1850 [2020-11-11 15:12:22,000 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:12:22,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2020-11-11 15:12:22,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1337. [2020-11-11 15:12:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 2.6766467065868262) internal successors, (3576), 1336 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:22,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 3576 transitions. [2020-11-11 15:12:22,041 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 3576 transitions. Word has length 56 [2020-11-11 15:12:22,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:22,041 INFO L481 AbstractCegarLoop]: Abstraction has 1337 states and 3576 transitions. [2020-11-11 15:12:22,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:22,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 3576 transitions. [2020-11-11 15:12:22,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:22,044 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:22,044 INFO L494 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] [2020-11-11 15:12:22,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:22,258 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:22,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:22,258 INFO L82 PathProgramCache]: Analyzing trace with hash 643256295, now seen corresponding path program 12 times [2020-11-11 15:12:22,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:22,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57716492] [2020-11-11 15:12:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:22,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57716492] [2020-11-11 15:12:22,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45120355] [2020-11-11 15:12:22,460 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 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 [2020-11-11 15:12:22,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 15:12:22,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:22,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:12:22,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:22,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:22,612 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:22,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:22,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-11 15:12:22,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051097619] [2020-11-11 15:12:22,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:12:22,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:22,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:12:22,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:22,622 INFO L87 Difference]: Start difference. First operand 1337 states and 3576 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:23,033 INFO L93 Difference]: Finished difference Result 2055 states and 5190 transitions. [2020-11-11 15:12:23,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:12:23,034 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 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 56 [2020-11-11 15:12:23,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:23,038 INFO L225 Difference]: With dead ends: 2055 [2020-11-11 15:12:23,039 INFO L226 Difference]: Without dead ends: 1785 [2020-11-11 15:12:23,039 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:12:23,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2020-11-11 15:12:23,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1387. [2020-11-11 15:12:23,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1386 states have (on average 2.688311688311688) internal successors, (3726), 1386 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 3726 transitions. [2020-11-11 15:12:23,077 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 3726 transitions. Word has length 56 [2020-11-11 15:12:23,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:23,077 INFO L481 AbstractCegarLoop]: Abstraction has 1387 states and 3726 transitions. [2020-11-11 15:12:23,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 3726 transitions. [2020-11-11 15:12:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:23,080 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:23,080 INFO L494 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] [2020-11-11 15:12:23,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-11 15:12:23,293 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash -713310411, now seen corresponding path program 13 times [2020-11-11 15:12:23,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:23,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752346558] [2020-11-11 15:12:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:23,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752346558] [2020-11-11 15:12:23,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503943093] [2020-11-11 15:12:23,428 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 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 [2020-11-11 15:12:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:23,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:12:23,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:23,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:23,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:23,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 15:12:23,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62320098] [2020-11-11 15:12:23,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:23,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:23,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:23,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:23,544 INFO L87 Difference]: Start difference. First operand 1387 states and 3726 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:23,845 INFO L93 Difference]: Finished difference Result 2110 states and 5365 transitions. [2020-11-11 15:12:23,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 15:12:23,845 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 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 56 [2020-11-11 15:12:23,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:23,849 INFO L225 Difference]: With dead ends: 2110 [2020-11-11 15:12:23,849 INFO L226 Difference]: Without dead ends: 1840 [2020-11-11 15:12:23,850 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:12:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2020-11-11 15:12:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1437. [2020-11-11 15:12:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 2.7061281337047354) internal successors, (3886), 1436 states have internal predecessors, (3886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3886 transitions. [2020-11-11 15:12:23,887 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3886 transitions. Word has length 56 [2020-11-11 15:12:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:23,887 INFO L481 AbstractCegarLoop]: Abstraction has 1437 states and 3886 transitions. [2020-11-11 15:12:23,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3886 transitions. [2020-11-11 15:12:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:23,890 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:23,890 INFO L494 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] [2020-11-11 15:12:24,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 15:12:24,104 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:24,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:24,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1118222373, now seen corresponding path program 14 times [2020-11-11 15:12:24,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:24,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680401] [2020-11-11 15:12:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:24,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680401] [2020-11-11 15:12:24,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106883076] [2020-11-11 15:12:24,254 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 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 [2020-11-11 15:12:24,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:24,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:24,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:12:24,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:24,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:24,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:24,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:24,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-11 15:12:24,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256666424] [2020-11-11 15:12:24,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:12:24,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:24,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:12:24,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:24,414 INFO L87 Difference]: Start difference. First operand 1437 states and 3886 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:25,045 INFO L93 Difference]: Finished difference Result 2569 states and 6634 transitions. [2020-11-11 15:12:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:25,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 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 56 [2020-11-11 15:12:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:25,051 INFO L225 Difference]: With dead ends: 2569 [2020-11-11 15:12:25,051 INFO L226 Difference]: Without dead ends: 2000 [2020-11-11 15:12:25,052 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:12:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2020-11-11 15:12:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1487. [2020-11-11 15:12:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.719380888290713) internal successors, (4041), 1486 states have internal predecessors, (4041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4041 transitions. [2020-11-11 15:12:25,099 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4041 transitions. Word has length 56 [2020-11-11 15:12:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:25,100 INFO L481 AbstractCegarLoop]: Abstraction has 1487 states and 4041 transitions. [2020-11-11 15:12:25,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:25,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4041 transitions. [2020-11-11 15:12:25,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:25,103 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:25,103 INFO L494 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] [2020-11-11 15:12:25,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 15:12:25,318 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:25,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1747013875, now seen corresponding path program 15 times [2020-11-11 15:12:25,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:25,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168585998] [2020-11-11 15:12:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:25,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168585998] [2020-11-11 15:12:25,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715753406] [2020-11-11 15:12:25,464 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 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 [2020-11-11 15:12:25,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 15:12:25,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:25,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:12:25,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:25,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:25,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:25,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 15:12:25,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111481803] [2020-11-11 15:12:25,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:25,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:25,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:25,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:25,583 INFO L87 Difference]: Start difference. First operand 1487 states and 4041 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:25,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:25,964 INFO L93 Difference]: Finished difference Result 3212 states and 8594 transitions. [2020-11-11 15:12:25,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:12:25,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 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 56 [2020-11-11 15:12:25,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:25,969 INFO L225 Difference]: With dead ends: 3212 [2020-11-11 15:12:25,970 INFO L226 Difference]: Without dead ends: 2942 [2020-11-11 15:12:25,971 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:12:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2020-11-11 15:12:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1612. [2020-11-11 15:12:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 2.751086281812539) internal successors, (4432), 1611 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 4432 transitions. [2020-11-11 15:12:26,018 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 4432 transitions. Word has length 56 [2020-11-11 15:12:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:26,018 INFO L481 AbstractCegarLoop]: Abstraction has 1612 states and 4432 transitions. [2020-11-11 15:12:26,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 4432 transitions. [2020-11-11 15:12:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:26,021 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:26,021 INFO L494 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] [2020-11-11 15:12:26,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-11 15:12:26,236 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:26,236 INFO L82 PathProgramCache]: Analyzing trace with hash -836745467, now seen corresponding path program 16 times [2020-11-11 15:12:26,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:26,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007415300] [2020-11-11 15:12:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:26,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007415300] [2020-11-11 15:12:26,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819811957] [2020-11-11 15:12:26,357 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 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 [2020-11-11 15:12:26,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:26,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:26,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:26,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:26,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:26,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:26,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:26,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 15:12:26,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928000287] [2020-11-11 15:12:26,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:26,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:26,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:26,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:26,478 INFO L87 Difference]: Start difference. First operand 1612 states and 4432 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:27,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:27,031 INFO L93 Difference]: Finished difference Result 2251 states and 5950 transitions. [2020-11-11 15:12:27,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:12:27,031 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 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 56 [2020-11-11 15:12:27,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:27,034 INFO L225 Difference]: With dead ends: 2251 [2020-11-11 15:12:27,035 INFO L226 Difference]: Without dead ends: 1780 [2020-11-11 15:12:27,036 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:12:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2020-11-11 15:12:27,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1302. [2020-11-11 15:12:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 2.7102229054573406) internal successors, (3526), 1301 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:27,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 3526 transitions. [2020-11-11 15:12:27,097 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 3526 transitions. Word has length 56 [2020-11-11 15:12:27,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:27,097 INFO L481 AbstractCegarLoop]: Abstraction has 1302 states and 3526 transitions. [2020-11-11 15:12:27,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:27,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 3526 transitions. [2020-11-11 15:12:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:12:27,100 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:27,100 INFO L494 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] [2020-11-11 15:12:27,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-11 15:12:27,313 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:27,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:27,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1823983856, now seen corresponding path program 17 times [2020-11-11 15:12:27,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:27,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964849794] [2020-11-11 15:12:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:27,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964849794] [2020-11-11 15:12:27,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467403321] [2020-11-11 15:12:27,482 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 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 [2020-11-11 15:12:27,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 15:12:27,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:27,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:12:27,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:27,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:27,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:27,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 15:12:27,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636065025] [2020-11-11 15:12:27,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:27,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:27,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:27,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:27,583 INFO L87 Difference]: Start difference. First operand 1302 states and 3526 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:27,919 INFO L93 Difference]: Finished difference Result 1995 states and 5090 transitions. [2020-11-11 15:12:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:12:27,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2020-11-11 15:12:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:27,926 INFO L225 Difference]: With dead ends: 1995 [2020-11-11 15:12:27,926 INFO L226 Difference]: Without dead ends: 1725 [2020-11-11 15:12:27,927 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:12:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2020-11-11 15:12:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1352. [2020-11-11 15:12:27,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 2.7209474463360475) internal successors, (3676), 1351 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 3676 transitions. [2020-11-11 15:12:27,960 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 3676 transitions. Word has length 61 [2020-11-11 15:12:27,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:27,961 INFO L481 AbstractCegarLoop]: Abstraction has 1352 states and 3676 transitions. [2020-11-11 15:12:27,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:27,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 3676 transitions. [2020-11-11 15:12:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:12:27,963 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:27,963 INFO L494 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] [2020-11-11 15:12:28,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:28,177 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:28,177 INFO L82 PathProgramCache]: Analyzing trace with hash 931447808, now seen corresponding path program 18 times [2020-11-11 15:12:28,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:28,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121852686] [2020-11-11 15:12:28,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:28,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121852686] [2020-11-11 15:12:28,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805756118] [2020-11-11 15:12:28,334 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 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 [2020-11-11 15:12:28,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 15:12:28,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:28,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:12:28,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:28,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:28,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:28,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:28,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 15:12:28,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851799216] [2020-11-11 15:12:28,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:12:28,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:28,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:12:28,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:28,455 INFO L87 Difference]: Start difference. First operand 1352 states and 3676 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:28,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:28,904 INFO L93 Difference]: Finished difference Result 2140 states and 5430 transitions. [2020-11-11 15:12:28,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:12:28,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 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 61 [2020-11-11 15:12:28,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:28,908 INFO L225 Difference]: With dead ends: 2140 [2020-11-11 15:12:28,908 INFO L226 Difference]: Without dead ends: 1870 [2020-11-11 15:12:28,909 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:12:28,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2020-11-11 15:12:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1402. [2020-11-11 15:12:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 2.7309064953604567) internal successors, (3826), 1401 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 3826 transitions. [2020-11-11 15:12:28,937 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 3826 transitions. Word has length 61 [2020-11-11 15:12:28,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:28,938 INFO L481 AbstractCegarLoop]: Abstraction has 1402 states and 3826 transitions. [2020-11-11 15:12:28,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 3826 transitions. [2020-11-11 15:12:28,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:12:28,940 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:28,941 INFO L494 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] [2020-11-11 15:12:29,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:29,155 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:29,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:29,155 INFO L82 PathProgramCache]: Analyzing trace with hash -425118898, now seen corresponding path program 19 times [2020-11-11 15:12:29,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:29,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137332613] [2020-11-11 15:12:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:29,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137332613] [2020-11-11 15:12:29,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255616198] [2020-11-11 15:12:29,307 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 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 [2020-11-11 15:12:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:29,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:12:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:29,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:29,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:29,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 15:12:29,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727852945] [2020-11-11 15:12:29,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:29,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:29,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:29,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:29,423 INFO L87 Difference]: Start difference. First operand 1402 states and 3826 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:29,838 INFO L93 Difference]: Finished difference Result 2145 states and 5490 transitions. [2020-11-11 15:12:29,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:12:29,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2020-11-11 15:12:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:29,841 INFO L225 Difference]: With dead ends: 2145 [2020-11-11 15:12:29,841 INFO L226 Difference]: Without dead ends: 1875 [2020-11-11 15:12:29,841 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:12:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2020-11-11 15:12:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1452. [2020-11-11 15:12:29,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 2.7401791867677465) internal successors, (3976), 1451 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 3976 transitions. [2020-11-11 15:12:29,870 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 3976 transitions. Word has length 61 [2020-11-11 15:12:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:29,870 INFO L481 AbstractCegarLoop]: Abstraction has 1452 states and 3976 transitions. [2020-11-11 15:12:29,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 3976 transitions. [2020-11-11 15:12:29,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:12:29,873 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:29,873 INFO L494 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] [2020-11-11 15:12:30,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:30,089 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:30,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:30,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1406413886, now seen corresponding path program 20 times [2020-11-11 15:12:30,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:30,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967013105] [2020-11-11 15:12:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:30,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967013105] [2020-11-11 15:12:30,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449629317] [2020-11-11 15:12:30,240 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 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 [2020-11-11 15:12:30,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:30,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:30,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:12:30,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:30,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:30,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:30,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:30,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 15:12:30,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186933811] [2020-11-11 15:12:30,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:12:30,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:30,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:12:30,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:30,366 INFO L87 Difference]: Start difference. First operand 1452 states and 3976 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:30,870 INFO L93 Difference]: Finished difference Result 2190 states and 5660 transitions. [2020-11-11 15:12:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:30,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 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 61 [2020-11-11 15:12:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:30,874 INFO L225 Difference]: With dead ends: 2190 [2020-11-11 15:12:30,874 INFO L226 Difference]: Without dead ends: 1920 [2020-11-11 15:12:30,875 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:12:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2020-11-11 15:12:30,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1502. [2020-11-11 15:12:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 2.7588274483677546) internal successors, (4141), 1501 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 4141 transitions. [2020-11-11 15:12:30,909 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 4141 transitions. Word has length 61 [2020-11-11 15:12:30,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:30,909 INFO L481 AbstractCegarLoop]: Abstraction has 1502 states and 4141 transitions. [2020-11-11 15:12:30,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 4141 transitions. [2020-11-11 15:12:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:12:30,912 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:30,912 INFO L494 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] [2020-11-11 15:12:31,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-11 15:12:31,126 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:31,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2035205388, now seen corresponding path program 21 times [2020-11-11 15:12:31,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:31,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193532272] [2020-11-11 15:12:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:31,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193532272] [2020-11-11 15:12:31,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908429014] [2020-11-11 15:12:31,269 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 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 [2020-11-11 15:12:31,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 15:12:31,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:31,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:31,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:31,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:31,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:31,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 15:12:31,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517493961] [2020-11-11 15:12:31,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:31,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:31,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:31,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:31,378 INFO L87 Difference]: Start difference. First operand 1502 states and 4141 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:31,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:31,839 INFO L93 Difference]: Finished difference Result 3252 states and 8744 transitions. [2020-11-11 15:12:31,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:12:31,840 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2020-11-11 15:12:31,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:31,844 INFO L225 Difference]: With dead ends: 3252 [2020-11-11 15:12:31,844 INFO L226 Difference]: Without dead ends: 2982 [2020-11-11 15:12:31,844 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:12:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2020-11-11 15:12:31,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1627. [2020-11-11 15:12:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.787207872078721) internal successors, (4532), 1626 states have internal predecessors, (4532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 4532 transitions. [2020-11-11 15:12:31,884 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 4532 transitions. Word has length 61 [2020-11-11 15:12:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:31,884 INFO L481 AbstractCegarLoop]: Abstraction has 1627 states and 4532 transitions. [2020-11-11 15:12:31,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:31,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 4532 transitions. [2020-11-11 15:12:31,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:12:31,887 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:31,887 INFO L494 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] [2020-11-11 15:12:32,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:32,102 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:32,102 INFO L82 PathProgramCache]: Analyzing trace with hash -548553954, now seen corresponding path program 22 times [2020-11-11 15:12:32,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:32,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598336309] [2020-11-11 15:12:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:32,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598336309] [2020-11-11 15:12:32,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885530711] [2020-11-11 15:12:32,271 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 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 [2020-11-11 15:12:32,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:32,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:32,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:32,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:32,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:32,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:32,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:32,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-11 15:12:32,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723351103] [2020-11-11 15:12:32,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:32,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:32,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:32,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:32,424 INFO L87 Difference]: Start difference. First operand 1627 states and 4532 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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) [2020-11-11 15:12:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:33,150 INFO L93 Difference]: Finished difference Result 2647 states and 6990 transitions. [2020-11-11 15:12:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:12:33,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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 61 [2020-11-11 15:12:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:33,153 INFO L225 Difference]: With dead ends: 2647 [2020-11-11 15:12:33,153 INFO L226 Difference]: Without dead ends: 2120 [2020-11-11 15:12:33,154 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:12:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2020-11-11 15:12:33,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1637. [2020-11-11 15:12:33,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 2.772616136919315) internal successors, (4536), 1636 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 4536 transitions. [2020-11-11 15:12:33,189 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 4536 transitions. Word has length 61 [2020-11-11 15:12:33,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:33,189 INFO L481 AbstractCegarLoop]: Abstraction has 1637 states and 4536 transitions. [2020-11-11 15:12:33,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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) [2020-11-11 15:12:33,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 4536 transitions. [2020-11-11 15:12:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:33,193 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:33,193 INFO L494 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] [2020-11-11 15:12:33,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-11 15:12:33,409 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:33,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:33,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1466794138, now seen corresponding path program 23 times [2020-11-11 15:12:33,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:33,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622752392] [2020-11-11 15:12:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:33,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622752392] [2020-11-11 15:12:33,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481827701] [2020-11-11 15:12:33,628 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 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 [2020-11-11 15:12:33,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 15:12:33,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:33,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:33,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:33,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:33,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:33,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:33,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2020-11-11 15:12:33,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229641459] [2020-11-11 15:12:33,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:33,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:33,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:33,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:33,797 INFO L87 Difference]: Start difference. First operand 1637 states and 4536 transitions. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 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) [2020-11-11 15:12:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:34,257 INFO L93 Difference]: Finished difference Result 2605 states and 6920 transitions. [2020-11-11 15:12:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:12:34,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 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 66 [2020-11-11 15:12:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:34,262 INFO L225 Difference]: With dead ends: 2605 [2020-11-11 15:12:34,262 INFO L226 Difference]: Without dead ends: 2271 [2020-11-11 15:12:34,263 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:12:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2020-11-11 15:12:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1722. [2020-11-11 15:12:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 2.7344567112144103) internal successors, (4706), 1721 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:34,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 4706 transitions. [2020-11-11 15:12:34,296 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 4706 transitions. Word has length 66 [2020-11-11 15:12:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:34,297 INFO L481 AbstractCegarLoop]: Abstraction has 1722 states and 4706 transitions. [2020-11-11 15:12:34,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 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) [2020-11-11 15:12:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 4706 transitions. [2020-11-11 15:12:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:34,300 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:34,300 INFO L494 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] [2020-11-11 15:12:34,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:34,515 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:34,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:34,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1504782136, now seen corresponding path program 24 times [2020-11-11 15:12:34,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:34,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215694247] [2020-11-11 15:12:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:34,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215694247] [2020-11-11 15:12:34,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716704759] [2020-11-11 15:12:34,761 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 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 [2020-11-11 15:12:34,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:12:34,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:34,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:34,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:34,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:34,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:34,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:12:34,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104060627] [2020-11-11 15:12:34,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:34,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:34,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:34,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:34,898 INFO L87 Difference]: Start difference. First operand 1722 states and 4706 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:35,202 INFO L93 Difference]: Finished difference Result 2670 states and 6730 transitions. [2020-11-11 15:12:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:12:35,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-11-11 15:12:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:35,207 INFO L225 Difference]: With dead ends: 2670 [2020-11-11 15:12:35,207 INFO L226 Difference]: Without dead ends: 2400 [2020-11-11 15:12:35,208 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:12:35,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2020-11-11 15:12:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1737. [2020-11-11 15:12:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:12:35,247 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:12:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:35,247 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:12:35,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:12:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:35,250 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:35,251 INFO L494 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] [2020-11-11 15:12:35,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-11 15:12:35,466 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:35,467 INFO L82 PathProgramCache]: Analyzing trace with hash -676070984, now seen corresponding path program 25 times [2020-11-11 15:12:35,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:35,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527784637] [2020-11-11 15:12:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:35,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527784637] [2020-11-11 15:12:35,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955491222] [2020-11-11 15:12:35,673 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 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 [2020-11-11 15:12:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:35,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:35,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:35,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:35,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:35,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:35,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-11 15:12:35,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473224737] [2020-11-11 15:12:35,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:35,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:35,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:35,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:35,831 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:36,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:36,290 INFO L93 Difference]: Finished difference Result 2555 states and 6500 transitions. [2020-11-11 15:12:36,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:12:36,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 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 66 [2020-11-11 15:12:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:36,295 INFO L225 Difference]: With dead ends: 2555 [2020-11-11 15:12:36,295 INFO L226 Difference]: Without dead ends: 2285 [2020-11-11 15:12:36,295 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:12:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-11-11 15:12:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1737. [2020-11-11 15:12:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:36,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:12:36,322 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:12:36,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:36,322 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:12:36,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:12:36,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:36,324 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:36,324 INFO L494 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] [2020-11-11 15:12:36,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:36,525 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:36,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:36,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1896357766, now seen corresponding path program 26 times [2020-11-11 15:12:36,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:36,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80931450] [2020-11-11 15:12:36,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:36,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80931450] [2020-11-11 15:12:36,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654779597] [2020-11-11 15:12:36,728 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 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 [2020-11-11 15:12:36,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:36,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:36,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:36,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:36,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:36,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:36,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:12:36,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637180556] [2020-11-11 15:12:36,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:36,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:36,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:36,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:36,884 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:37,286 INFO L93 Difference]: Finished difference Result 2530 states and 6450 transitions. [2020-11-11 15:12:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:12:37,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-11-11 15:12:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:37,290 INFO L225 Difference]: With dead ends: 2530 [2020-11-11 15:12:37,290 INFO L226 Difference]: Without dead ends: 2260 [2020-11-11 15:12:37,291 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:12:37,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2020-11-11 15:12:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1737. [2020-11-11 15:12:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:12:37,322 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:12:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:37,322 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:12:37,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:12:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:37,325 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:37,325 INFO L494 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] [2020-11-11 15:12:37,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-11 15:12:37,526 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:37,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:37,526 INFO L82 PathProgramCache]: Analyzing trace with hash 356822134, now seen corresponding path program 27 times [2020-11-11 15:12:37,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:37,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825794580] [2020-11-11 15:12:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:37,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825794580] [2020-11-11 15:12:37,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17098254] [2020-11-11 15:12:37,724 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 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 [2020-11-11 15:12:37,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:12:37,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:37,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:37,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:37,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:37,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-11 15:12:37,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699575206] [2020-11-11 15:12:37,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:37,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:37,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:37,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:37,878 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:38,375 INFO L93 Difference]: Finished difference Result 2480 states and 6350 transitions. [2020-11-11 15:12:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:12:38,376 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 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 66 [2020-11-11 15:12:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:38,379 INFO L225 Difference]: With dead ends: 2480 [2020-11-11 15:12:38,379 INFO L226 Difference]: Without dead ends: 2210 [2020-11-11 15:12:38,380 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:12:38,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2020-11-11 15:12:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1737. [2020-11-11 15:12:38,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:12:38,408 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:12:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:38,408 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:12:38,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:12:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:38,411 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:38,411 INFO L494 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] [2020-11-11 15:12:38,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-11 15:12:38,620 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:38,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:38,620 INFO L82 PathProgramCache]: Analyzing trace with hash -999744572, now seen corresponding path program 28 times [2020-11-11 15:12:38,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:38,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601250093] [2020-11-11 15:12:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:38,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601250093] [2020-11-11 15:12:38,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887682256] [2020-11-11 15:12:38,777 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 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 [2020-11-11 15:12:38,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:38,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:38,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:38,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:38,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:38,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:38,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:12:38,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298345351] [2020-11-11 15:12:38,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:38,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:38,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:38,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:38,921 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:39,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:39,376 INFO L93 Difference]: Finished difference Result 2430 states and 6250 transitions. [2020-11-11 15:12:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:12:39,376 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-11-11 15:12:39,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:39,379 INFO L225 Difference]: With dead ends: 2430 [2020-11-11 15:12:39,379 INFO L226 Difference]: Without dead ends: 2160 [2020-11-11 15:12:39,379 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:12:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2020-11-11 15:12:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1737. [2020-11-11 15:12:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:12:39,409 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:12:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:39,409 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:12:39,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:12:39,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:39,413 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:39,413 INFO L494 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] [2020-11-11 15:12:39,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-11 15:12:39,627 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:39,627 INFO L82 PathProgramCache]: Analyzing trace with hash 831788212, now seen corresponding path program 29 times [2020-11-11 15:12:39,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:39,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039318093] [2020-11-11 15:12:39,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:39,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039318093] [2020-11-11 15:12:39,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955442702] [2020-11-11 15:12:39,835 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 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 [2020-11-11 15:12:39,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 15:12:39,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:39,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:39,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:39,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:39,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:39,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:39,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-11 15:12:39,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523611182] [2020-11-11 15:12:39,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:40,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:40,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:40,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:40,006 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:40,627 INFO L93 Difference]: Finished difference Result 2425 states and 6260 transitions. [2020-11-11 15:12:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:12:40,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 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 66 [2020-11-11 15:12:40,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:40,632 INFO L225 Difference]: With dead ends: 2425 [2020-11-11 15:12:40,632 INFO L226 Difference]: Without dead ends: 2155 [2020-11-11 15:12:40,632 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:12:40,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2020-11-11 15:12:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1737. [2020-11-11 15:12:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.7309907834101383) internal successors, (4741), 1736 states have internal predecessors, (4741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:40,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4741 transitions. [2020-11-11 15:12:40,673 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4741 transitions. Word has length 66 [2020-11-11 15:12:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:40,673 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4741 transitions. [2020-11-11 15:12:40,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:40,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4741 transitions. [2020-11-11 15:12:40,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:40,676 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:40,677 INFO L494 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] [2020-11-11 15:12:40,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-11 15:12:40,891 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:40,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1460579714, now seen corresponding path program 30 times [2020-11-11 15:12:40,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:40,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116425554] [2020-11-11 15:12:40,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:41,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116425554] [2020-11-11 15:12:41,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430018971] [2020-11-11 15:12:41,042 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 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 [2020-11-11 15:12:41,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:12:41,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:41,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:41,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:41,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:41,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:41,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:12:41,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824863442] [2020-11-11 15:12:41,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:41,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:41,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:41,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:41,172 INFO L87 Difference]: Start difference. First operand 1737 states and 4741 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:41,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:41,696 INFO L93 Difference]: Finished difference Result 3512 states and 9394 transitions. [2020-11-11 15:12:41,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:12:41,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-11-11 15:12:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:41,701 INFO L225 Difference]: With dead ends: 3512 [2020-11-11 15:12:41,702 INFO L226 Difference]: Without dead ends: 3242 [2020-11-11 15:12:41,702 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:12:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2020-11-11 15:12:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 1862. [2020-11-11 15:12:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 2.7576571735626008) internal successors, (5132), 1861 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 5132 transitions. [2020-11-11 15:12:41,737 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 5132 transitions. Word has length 66 [2020-11-11 15:12:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:41,737 INFO L481 AbstractCegarLoop]: Abstraction has 1862 states and 5132 transitions. [2020-11-11 15:12:41,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:41,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 5132 transitions. [2020-11-11 15:12:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:41,739 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:41,740 INFO L494 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] [2020-11-11 15:12:41,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:41,956 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:41,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:41,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1123179628, now seen corresponding path program 31 times [2020-11-11 15:12:41,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:41,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761672255] [2020-11-11 15:12:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:42,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761672255] [2020-11-11 15:12:42,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444765847] [2020-11-11 15:12:42,121 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 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 [2020-11-11 15:12:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:42,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:42,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:42,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:42,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:42,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:42,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:12:42,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626938639] [2020-11-11 15:12:42,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:42,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:42,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:42,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:42,252 INFO L87 Difference]: Start difference. First operand 1862 states and 5132 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:42,964 INFO L93 Difference]: Finished difference Result 2551 states and 6750 transitions. [2020-11-11 15:12:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:12:42,965 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-11-11 15:12:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:42,968 INFO L225 Difference]: With dead ends: 2551 [2020-11-11 15:12:42,968 INFO L226 Difference]: Without dead ends: 2080 [2020-11-11 15:12:42,969 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 15:12:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2020-11-11 15:12:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1452. [2020-11-11 15:12:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 2.7057201929703654) internal successors, (3926), 1451 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 3926 transitions. [2020-11-11 15:12:42,997 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 3926 transitions. Word has length 66 [2020-11-11 15:12:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:42,997 INFO L481 AbstractCegarLoop]: Abstraction has 1452 states and 3926 transitions. [2020-11-11 15:12:42,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 3926 transitions. [2020-11-11 15:12:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:43,000 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:43,000 INFO L494 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] [2020-11-11 15:12:43,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-11 15:12:43,211 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:43,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:43,211 INFO L82 PathProgramCache]: Analyzing trace with hash 244367777, now seen corresponding path program 32 times [2020-11-11 15:12:43,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:43,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366389068] [2020-11-11 15:12:43,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:43,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366389068] [2020-11-11 15:12:43,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126155747] [2020-11-11 15:12:43,424 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 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 [2020-11-11 15:12:43,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:43,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:43,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:43,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:43,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:43,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:43,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:12:43,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982909642] [2020-11-11 15:12:43,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:43,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:43,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:43,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:43,541 INFO L87 Difference]: Start difference. First operand 1452 states and 3926 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:43,959 INFO L93 Difference]: Finished difference Result 2245 states and 5690 transitions. [2020-11-11 15:12:43,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:12:43,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2020-11-11 15:12:43,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:43,963 INFO L225 Difference]: With dead ends: 2245 [2020-11-11 15:12:43,963 INFO L226 Difference]: Without dead ends: 1975 [2020-11-11 15:12:43,963 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:12:43,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2020-11-11 15:12:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1502. [2020-11-11 15:12:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 2.7155229846768822) internal successors, (4076), 1501 states have internal predecessors, (4076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 4076 transitions. [2020-11-11 15:12:43,996 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 4076 transitions. Word has length 71 [2020-11-11 15:12:43,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:43,996 INFO L481 AbstractCegarLoop]: Abstraction has 1502 states and 4076 transitions. [2020-11-11 15:12:43,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 4076 transitions. [2020-11-11 15:12:43,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:43,999 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:43,999 INFO L494 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] [2020-11-11 15:12:44,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-11 15:12:44,215 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:44,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:44,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1073078929, now seen corresponding path program 33 times [2020-11-11 15:12:44,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:44,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518719023] [2020-11-11 15:12:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:44,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518719023] [2020-11-11 15:12:44,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034777330] [2020-11-11 15:12:44,435 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 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 [2020-11-11 15:12:44,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:12:44,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:44,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:44,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:44,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:44,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:44,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:44,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:12:44,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060370740] [2020-11-11 15:12:44,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:44,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:44,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:44,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:44,574 INFO L87 Difference]: Start difference. First operand 1502 states and 4076 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) [2020-11-11 15:12:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:45,088 INFO L93 Difference]: Finished difference Result 2440 states and 6130 transitions. [2020-11-11 15:12:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:45,088 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 71 [2020-11-11 15:12:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:45,092 INFO L225 Difference]: With dead ends: 2440 [2020-11-11 15:12:45,092 INFO L226 Difference]: Without dead ends: 2170 [2020-11-11 15:12:45,092 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:12:45,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2020-11-11 15:12:45,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1552. [2020-11-11 15:12:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 2.7246937459703418) internal successors, (4226), 1551 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:45,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 4226 transitions. [2020-11-11 15:12:45,119 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 4226 transitions. Word has length 71 [2020-11-11 15:12:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:45,119 INFO L481 AbstractCegarLoop]: Abstraction has 1552 states and 4226 transitions. [2020-11-11 15:12:45,119 INFO L482 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) [2020-11-11 15:12:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 4226 transitions. [2020-11-11 15:12:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:45,122 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:45,122 INFO L494 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] [2020-11-11 15:12:45,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:45,336 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash -649459617, now seen corresponding path program 34 times [2020-11-11 15:12:45,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:45,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321779989] [2020-11-11 15:12:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:45,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321779989] [2020-11-11 15:12:45,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067430392] [2020-11-11 15:12:45,524 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 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 [2020-11-11 15:12:45,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:45,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:45,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:45,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:45,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:45,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:45,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:12:45,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970162518] [2020-11-11 15:12:45,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:45,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:45,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:45,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:45,679 INFO L87 Difference]: Start difference. First operand 1552 states and 4226 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:46,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:46,166 INFO L93 Difference]: Finished difference Result 2445 states and 6190 transitions. [2020-11-11 15:12:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:12:46,167 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2020-11-11 15:12:46,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:46,170 INFO L225 Difference]: With dead ends: 2445 [2020-11-11 15:12:46,171 INFO L226 Difference]: Without dead ends: 2175 [2020-11-11 15:12:46,171 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:12:46,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2020-11-11 15:12:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1602. [2020-11-11 15:12:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1601 states have (on average 2.7332916926920676) internal successors, (4376), 1601 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 4376 transitions. [2020-11-11 15:12:46,198 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 4376 transitions. Word has length 71 [2020-11-11 15:12:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:46,198 INFO L481 AbstractCegarLoop]: Abstraction has 1602 states and 4376 transitions. [2020-11-11 15:12:46,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 4376 transitions. [2020-11-11 15:12:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:46,200 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:46,200 INFO L494 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] [2020-11-11 15:12:46,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-11 15:12:46,401 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:46,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:46,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2105972047, now seen corresponding path program 35 times [2020-11-11 15:12:46,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:46,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045506819] [2020-11-11 15:12:46,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:46,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045506819] [2020-11-11 15:12:46,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611307131] [2020-11-11 15:12:46,583 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 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 [2020-11-11 15:12:46,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 15:12:46,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:46,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:46,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:46,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:46,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:46,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:46,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:12:46,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512424800] [2020-11-11 15:12:46,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:46,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:46,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:46,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:46,711 INFO L87 Difference]: Start difference. First operand 1602 states and 4376 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) [2020-11-11 15:12:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:47,343 INFO L93 Difference]: Finished difference Result 2445 states and 6240 transitions. [2020-11-11 15:12:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:12:47,344 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 71 [2020-11-11 15:12:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:47,346 INFO L225 Difference]: With dead ends: 2445 [2020-11-11 15:12:47,347 INFO L226 Difference]: Without dead ends: 2175 [2020-11-11 15:12:47,347 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:12:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2020-11-11 15:12:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1652. [2020-11-11 15:12:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 2.741368867353119) internal successors, (4526), 1651 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 4526 transitions. [2020-11-11 15:12:47,385 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 4526 transitions. Word has length 71 [2020-11-11 15:12:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:47,386 INFO L481 AbstractCegarLoop]: Abstraction has 1652 states and 4526 transitions. [2020-11-11 15:12:47,386 INFO L482 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) [2020-11-11 15:12:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 4526 transitions. [2020-11-11 15:12:47,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:47,389 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:47,389 INFO L494 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] [2020-11-11 15:12:47,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:47,603 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:47,603 INFO L82 PathProgramCache]: Analyzing trace with hash 749405341, now seen corresponding path program 36 times [2020-11-11 15:12:47,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:47,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421688811] [2020-11-11 15:12:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:47,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421688811] [2020-11-11 15:12:47,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007800554] [2020-11-11 15:12:47,776 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 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 [2020-11-11 15:12:47,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:12:47,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:47,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:47,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:47,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:47,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:47,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:12:47,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295245497] [2020-11-11 15:12:47,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:47,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:47,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:47,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:47,895 INFO L87 Difference]: Start difference. First operand 1652 states and 4526 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:48,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:48,434 INFO L93 Difference]: Finished difference Result 2445 states and 6290 transitions. [2020-11-11 15:12:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:12:48,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2020-11-11 15:12:48,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:48,438 INFO L225 Difference]: With dead ends: 2445 [2020-11-11 15:12:48,438 INFO L226 Difference]: Without dead ends: 2175 [2020-11-11 15:12:48,439 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:12:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2020-11-11 15:12:48,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1702. [2020-11-11 15:12:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 2.748971193415638) internal successors, (4676), 1701 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:48,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 4676 transitions. [2020-11-11 15:12:48,480 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 4676 transitions. Word has length 71 [2020-11-11 15:12:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:48,481 INFO L481 AbstractCegarLoop]: Abstraction has 1702 states and 4676 transitions. [2020-11-11 15:12:48,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:48,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 4676 transitions. [2020-11-11 15:12:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:48,483 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:48,483 INFO L494 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] [2020-11-11 15:12:48,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-11 15:12:48,684 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:48,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:48,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1714029171, now seen corresponding path program 37 times [2020-11-11 15:12:48,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:48,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242461083] [2020-11-11 15:12:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:48,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242461083] [2020-11-11 15:12:48,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92054530] [2020-11-11 15:12:48,855 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 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 [2020-11-11 15:12:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:48,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:48,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:48,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:48,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:48,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:48,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:12:48,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329534401] [2020-11-11 15:12:48,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:48,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:48,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:48,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:48,990 INFO L87 Difference]: Start difference. First operand 1702 states and 4676 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) [2020-11-11 15:12:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:49,719 INFO L93 Difference]: Finished difference Result 2490 states and 6460 transitions. [2020-11-11 15:12:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:49,720 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 71 [2020-11-11 15:12:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:49,723 INFO L225 Difference]: With dead ends: 2490 [2020-11-11 15:12:49,724 INFO L226 Difference]: Without dead ends: 2220 [2020-11-11 15:12:49,724 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=301, Invalid=889, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:12:49,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2020-11-11 15:12:49,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1752. [2020-11-11 15:12:49,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.764705882352941) internal successors, (4841), 1751 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4841 transitions. [2020-11-11 15:12:49,751 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4841 transitions. Word has length 71 [2020-11-11 15:12:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:49,751 INFO L481 AbstractCegarLoop]: Abstraction has 1752 states and 4841 transitions. [2020-11-11 15:12:49,751 INFO L482 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) [2020-11-11 15:12:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4841 transitions. [2020-11-11 15:12:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:49,753 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:49,753 INFO L494 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] [2020-11-11 15:12:49,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-11 15:12:49,954 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:49,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:49,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1085237669, now seen corresponding path program 38 times [2020-11-11 15:12:49,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:49,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522532437] [2020-11-11 15:12:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:50,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522532437] [2020-11-11 15:12:50,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273302311] [2020-11-11 15:12:50,120 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 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 [2020-11-11 15:12:50,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:50,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:50,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:50,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:50,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:50,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:50,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:12:50,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191938319] [2020-11-11 15:12:50,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:50,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:50,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:50,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:50,241 INFO L87 Difference]: Start difference. First operand 1752 states and 4841 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:50,856 INFO L93 Difference]: Finished difference Result 3552 states and 9544 transitions. [2020-11-11 15:12:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:12:50,857 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2020-11-11 15:12:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:50,861 INFO L225 Difference]: With dead ends: 3552 [2020-11-11 15:12:50,861 INFO L226 Difference]: Without dead ends: 3282 [2020-11-11 15:12:50,862 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:12:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2020-11-11 15:12:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 1877. [2020-11-11 15:12:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.788912579957356) internal successors, (5232), 1876 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5232 transitions. [2020-11-11 15:12:50,895 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5232 transitions. Word has length 71 [2020-11-11 15:12:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:50,895 INFO L481 AbstractCegarLoop]: Abstraction has 1877 states and 5232 transitions. [2020-11-11 15:12:50,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5232 transitions. [2020-11-11 15:12:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:50,897 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:50,897 INFO L494 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] [2020-11-11 15:12:51,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-11 15:12:51,098 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:51,099 INFO L82 PathProgramCache]: Analyzing trace with hash 625970285, now seen corresponding path program 39 times [2020-11-11 15:12:51,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:51,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834240894] [2020-11-11 15:12:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:51,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834240894] [2020-11-11 15:12:51,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732277823] [2020-11-11 15:12:51,283 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 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 [2020-11-11 15:12:51,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:12:51,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:51,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:51,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:51,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:51,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:51,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:12:51,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55366256] [2020-11-11 15:12:51,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:51,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:51,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:51,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:51,444 INFO L87 Difference]: Start difference. First operand 1877 states and 5232 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) [2020-11-11 15:12:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:52,211 INFO L93 Difference]: Finished difference Result 2566 states and 6850 transitions. [2020-11-11 15:12:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:12:52,212 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 71 [2020-11-11 15:12:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:52,215 INFO L225 Difference]: With dead ends: 2566 [2020-11-11 15:12:52,215 INFO L226 Difference]: Without dead ends: 2155 [2020-11-11 15:12:52,216 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:12:52,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2020-11-11 15:12:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1391. [2020-11-11 15:12:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 2.710791366906475) internal successors, (3768), 1390 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 3768 transitions. [2020-11-11 15:12:52,251 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 3768 transitions. Word has length 71 [2020-11-11 15:12:52,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:52,251 INFO L481 AbstractCegarLoop]: Abstraction has 1391 states and 3768 transitions. [2020-11-11 15:12:52,251 INFO L482 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) [2020-11-11 15:12:52,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 3768 transitions. [2020-11-11 15:12:52,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:52,253 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:52,254 INFO L494 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] [2020-11-11 15:12:52,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-11 15:12:52,468 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:52,469 INFO L82 PathProgramCache]: Analyzing trace with hash 582428331, now seen corresponding path program 40 times [2020-11-11 15:12:52,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:52,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971938183] [2020-11-11 15:12:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:52,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971938183] [2020-11-11 15:12:52,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989670616] [2020-11-11 15:12:52,736 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 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 [2020-11-11 15:12:52,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:52,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:52,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:52,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:52,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:52,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:52,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:52,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2020-11-11 15:12:52,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664951985] [2020-11-11 15:12:52,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:52,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:52,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:52,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:52,906 INFO L87 Difference]: Start difference. First operand 1391 states and 3768 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:53,426 INFO L93 Difference]: Finished difference Result 2409 states and 6252 transitions. [2020-11-11 15:12:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:53,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 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 76 [2020-11-11 15:12:53,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:53,430 INFO L225 Difference]: With dead ends: 2409 [2020-11-11 15:12:53,430 INFO L226 Difference]: Without dead ends: 2075 [2020-11-11 15:12:53,430 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:12:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2020-11-11 15:12:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1476. [2020-11-11 15:12:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 2.6698305084745764) internal successors, (3938), 1475 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 3938 transitions. [2020-11-11 15:12:53,451 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 3938 transitions. Word has length 76 [2020-11-11 15:12:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:53,451 INFO L481 AbstractCegarLoop]: Abstraction has 1476 states and 3938 transitions. [2020-11-11 15:12:53,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 3938 transitions. [2020-11-11 15:12:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:53,453 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:53,453 INFO L494 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] [2020-11-11 15:12:53,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:53,654 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:53,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1793236313, now seen corresponding path program 41 times [2020-11-11 15:12:53,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:53,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414541870] [2020-11-11 15:12:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:53,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414541870] [2020-11-11 15:12:53,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101462103] [2020-11-11 15:12:53,901 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 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 [2020-11-11 15:12:53,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:12:53,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:53,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:53,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:54,015 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:54,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:54,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:12:54,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036743693] [2020-11-11 15:12:54,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:12:54,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:54,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:12:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:12:54,030 INFO L87 Difference]: Start difference. First operand 1476 states and 3938 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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) [2020-11-11 15:12:54,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:54,415 INFO L93 Difference]: Finished difference Result 2660 states and 6520 transitions. [2020-11-11 15:12:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:12:54,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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 76 [2020-11-11 15:12:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:54,419 INFO L225 Difference]: With dead ends: 2660 [2020-11-11 15:12:54,419 INFO L226 Difference]: Without dead ends: 2390 [2020-11-11 15:12:54,420 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:12:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2020-11-11 15:12:54,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1577. [2020-11-11 15:12:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 2.681472081218274) internal successors, (4226), 1576 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 4226 transitions. [2020-11-11 15:12:54,446 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 4226 transitions. Word has length 76 [2020-11-11 15:12:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:54,446 INFO L481 AbstractCegarLoop]: Abstraction has 1577 states and 4226 transitions. [2020-11-11 15:12:54,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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) [2020-11-11 15:12:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 4226 transitions. [2020-11-11 15:12:54,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:54,448 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:54,448 INFO L494 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] [2020-11-11 15:12:54,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-11-11 15:12:54,650 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:54,651 INFO L82 PathProgramCache]: Analyzing trace with hash 247943753, now seen corresponding path program 42 times [2020-11-11 15:12:54,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:54,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022150803] [2020-11-11 15:12:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:54,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022150803] [2020-11-11 15:12:54,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273995273] [2020-11-11 15:12:54,896 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 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 [2020-11-11 15:12:54,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:12:54,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:54,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:54,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:55,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:55,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:55,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:55,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:12:55,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006685145] [2020-11-11 15:12:55,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:55,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:55,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:55,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:55,059 INFO L87 Difference]: Start difference. First operand 1577 states and 4226 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:55,604 INFO L93 Difference]: Finished difference Result 2595 states and 6440 transitions. [2020-11-11 15:12:55,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:55,605 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2020-11-11 15:12:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:55,609 INFO L225 Difference]: With dead ends: 2595 [2020-11-11 15:12:55,609 INFO L226 Difference]: Without dead ends: 2325 [2020-11-11 15:12:55,609 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:12:55,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2020-11-11 15:12:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1627. [2020-11-11 15:12:55,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.6912669126691267) internal successors, (4376), 1626 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 4376 transitions. [2020-11-11 15:12:55,634 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 4376 transitions. Word has length 76 [2020-11-11 15:12:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:55,634 INFO L481 AbstractCegarLoop]: Abstraction has 1627 states and 4376 transitions. [2020-11-11 15:12:55,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 4376 transitions. [2020-11-11 15:12:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:55,636 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:55,636 INFO L494 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] [2020-11-11 15:12:55,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:55,837 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:55,837 INFO L82 PathProgramCache]: Analyzing trace with hash -319222121, now seen corresponding path program 43 times [2020-11-11 15:12:55,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:55,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906889969] [2020-11-11 15:12:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:56,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906889969] [2020-11-11 15:12:56,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206468525] [2020-11-11 15:12:56,031 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 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 [2020-11-11 15:12:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:56,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:56,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:56,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:56,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:56,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:12:56,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622182863] [2020-11-11 15:12:56,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:12:56,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:56,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:12:56,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:12:56,163 INFO L87 Difference]: Start difference. First operand 1627 states and 4376 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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) [2020-11-11 15:12:56,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:56,637 INFO L93 Difference]: Finished difference Result 2620 states and 6540 transitions. [2020-11-11 15:12:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:12:56,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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 76 [2020-11-11 15:12:56,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:56,641 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:12:56,641 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:12:56,642 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:12:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:12:56,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1677. [2020-11-11 15:12:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 2.700477326968974) internal successors, (4526), 1676 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 4526 transitions. [2020-11-11 15:12:56,667 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 4526 transitions. Word has length 76 [2020-11-11 15:12:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:56,667 INFO L481 AbstractCegarLoop]: Abstraction has 1677 states and 4526 transitions. [2020-11-11 15:12:56,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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) [2020-11-11 15:12:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 4526 transitions. [2020-11-11 15:12:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:56,669 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:56,669 INFO L494 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] [2020-11-11 15:12:56,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-11 15:12:56,870 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:56,871 INFO L82 PathProgramCache]: Analyzing trace with hash 509489031, now seen corresponding path program 44 times [2020-11-11 15:12:56,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:56,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471841885] [2020-11-11 15:12:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:57,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471841885] [2020-11-11 15:12:57,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332027150] [2020-11-11 15:12:57,123 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 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 [2020-11-11 15:12:57,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:57,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:57,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:57,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:57,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:57,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:57,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:57,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:12:57,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13981013] [2020-11-11 15:12:57,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:57,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:57,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:57,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:57,294 INFO L87 Difference]: Start difference. First operand 1677 states and 4526 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:57,936 INFO L93 Difference]: Finished difference Result 2620 states and 6590 transitions. [2020-11-11 15:12:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:12:57,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2020-11-11 15:12:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:57,939 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:12:57,940 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:12:57,940 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:12:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:12:57,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1727. [2020-11-11 15:12:57,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 2.709154113557358) internal successors, (4676), 1726 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 4676 transitions. [2020-11-11 15:12:57,967 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 4676 transitions. Word has length 76 [2020-11-11 15:12:57,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:57,968 INFO L481 AbstractCegarLoop]: Abstraction has 1727 states and 4676 transitions. [2020-11-11 15:12:57,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:57,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 4676 transitions. [2020-11-11 15:12:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:57,970 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:57,970 INFO L494 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] [2020-11-11 15:12:58,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-11 15:12:58,171 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:58,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:58,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1213049515, now seen corresponding path program 45 times [2020-11-11 15:12:58,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:58,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000958674] [2020-11-11 15:12:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:58,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000958674] [2020-11-11 15:12:58,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889440452] [2020-11-11 15:12:58,367 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 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 [2020-11-11 15:12:58,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:12:58,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:58,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:12:58,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:58,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:58,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:58,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:12:58,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087357065] [2020-11-11 15:12:58,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:12:58,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:58,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:12:58,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:12:58,513 INFO L87 Difference]: Start difference. First operand 1727 states and 4676 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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) [2020-11-11 15:12:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:59,065 INFO L93 Difference]: Finished difference Result 2620 states and 6640 transitions. [2020-11-11 15:12:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:12:59,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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 76 [2020-11-11 15:12:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:59,069 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:12:59,070 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:12:59,070 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:12:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:12:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1777. [2020-11-11 15:12:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 2.7173423423423424) internal successors, (4826), 1776 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 4826 transitions. [2020-11-11 15:12:59,096 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 4826 transitions. Word has length 76 [2020-11-11 15:12:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:59,096 INFO L481 AbstractCegarLoop]: Abstraction has 1777 states and 4826 transitions. [2020-11-11 15:12:59,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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) [2020-11-11 15:12:59,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 4826 transitions. [2020-11-11 15:12:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:59,098 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:59,098 INFO L494 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] [2020-11-11 15:12:59,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:59,300 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:59,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1542382149, now seen corresponding path program 46 times [2020-11-11 15:12:59,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:59,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342152166] [2020-11-11 15:12:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:59,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342152166] [2020-11-11 15:12:59,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234605320] [2020-11-11 15:12:59,526 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 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 [2020-11-11 15:12:59,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:59,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:59,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:59,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:59,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:59,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:59,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:59,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:12:59,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294410345] [2020-11-11 15:12:59,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:59,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:59,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:59,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:59,688 INFO L87 Difference]: Start difference. First operand 1777 states and 4826 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:00,450 INFO L93 Difference]: Finished difference Result 2620 states and 6690 transitions. [2020-11-11 15:13:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:13:00,451 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2020-11-11 15:13:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:00,454 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:13:00,454 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:13:00,455 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:13:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:13:00,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1827. [2020-11-11 15:13:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 2.725082146768894) internal successors, (4976), 1826 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 4976 transitions. [2020-11-11 15:13:00,486 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 4976 transitions. Word has length 76 [2020-11-11 15:13:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:00,487 INFO L481 AbstractCegarLoop]: Abstraction has 1827 states and 4976 transitions. [2020-11-11 15:13:00,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:00,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 4976 transitions. [2020-11-11 15:13:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:13:00,489 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:00,490 INFO L494 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] [2020-11-11 15:13:00,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-11 15:13:00,691 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:00,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:00,691 INFO L82 PathProgramCache]: Analyzing trace with hash 185815443, now seen corresponding path program 47 times [2020-11-11 15:13:00,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:00,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280181588] [2020-11-11 15:13:00,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:00,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280181588] [2020-11-11 15:13:00,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350203782] [2020-11-11 15:13:00,886 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 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 [2020-11-11 15:13:00,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:13:00,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:00,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:13:00,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:01,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:01,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:01,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:13:01,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252022015] [2020-11-11 15:13:01,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:13:01,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:01,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:13:01,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:13:01,071 INFO L87 Difference]: Start difference. First operand 1827 states and 4976 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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) [2020-11-11 15:13:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:01,747 INFO L93 Difference]: Finished difference Result 2620 states and 6740 transitions. [2020-11-11 15:13:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:13:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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 76 [2020-11-11 15:13:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:01,752 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:13:01,752 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:13:01,752 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:13:01,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:13:01,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1877. [2020-11-11 15:13:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.732409381663113) internal successors, (5126), 1876 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:01,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5126 transitions. [2020-11-11 15:13:01,784 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5126 transitions. Word has length 76 [2020-11-11 15:13:01,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:01,784 INFO L481 AbstractCegarLoop]: Abstraction has 1877 states and 5126 transitions. [2020-11-11 15:13:01,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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) [2020-11-11 15:13:01,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5126 transitions. [2020-11-11 15:13:01,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:13:01,786 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:01,786 INFO L494 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] [2020-11-11 15:13:01,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-11 15:13:01,987 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:01,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2017348227, now seen corresponding path program 48 times [2020-11-11 15:13:01,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:01,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067071789] [2020-11-11 15:13:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:02,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067071789] [2020-11-11 15:13:02,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577048476] [2020-11-11 15:13:02,199 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 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 [2020-11-11 15:13:02,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:13:02,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:02,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:02,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:02,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:02,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:02,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:13:02,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928094912] [2020-11-11 15:13:02,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:02,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:02,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:02,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:02,355 INFO L87 Difference]: Start difference. First operand 1877 states and 5126 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:03,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:03,152 INFO L93 Difference]: Finished difference Result 2665 states and 6910 transitions. [2020-11-11 15:13:03,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:13:03,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2020-11-11 15:13:03,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:03,156 INFO L225 Difference]: With dead ends: 2665 [2020-11-11 15:13:03,156 INFO L226 Difference]: Without dead ends: 2395 [2020-11-11 15:13:03,157 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:13:03,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2020-11-11 15:13:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 1927. [2020-11-11 15:13:03,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 2.7471443406022846) internal successors, (5291), 1926 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 5291 transitions. [2020-11-11 15:13:03,185 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 5291 transitions. Word has length 76 [2020-11-11 15:13:03,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:03,185 INFO L481 AbstractCegarLoop]: Abstraction has 1927 states and 5291 transitions. [2020-11-11 15:13:03,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 5291 transitions. [2020-11-11 15:13:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:13:03,187 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:03,187 INFO L494 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] [2020-11-11 15:13:03,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-11 15:13:03,388 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:03,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:03,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1648827567, now seen corresponding path program 49 times [2020-11-11 15:13:03,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:03,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611865074] [2020-11-11 15:13:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:03,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611865074] [2020-11-11 15:13:03,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426226752] [2020-11-11 15:13:03,579 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 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 [2020-11-11 15:13:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:03,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:13:03,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:03,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:03,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:03,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:13:03,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409145118] [2020-11-11 15:13:03,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:13:03,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:03,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:13:03,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:13:03,709 INFO L87 Difference]: Start difference. First operand 1927 states and 5291 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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) [2020-11-11 15:13:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:04,365 INFO L93 Difference]: Finished difference Result 3752 states and 10044 transitions. [2020-11-11 15:13:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:13:04,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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 76 [2020-11-11 15:13:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:04,370 INFO L225 Difference]: With dead ends: 3752 [2020-11-11 15:13:04,370 INFO L226 Difference]: Without dead ends: 3482 [2020-11-11 15:13:04,371 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:13:04,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2020-11-11 15:13:04,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 2052. [2020-11-11 15:13:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 2.7703559239395417) internal successors, (5682), 2051 states have internal predecessors, (5682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:04,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5682 transitions. [2020-11-11 15:13:04,404 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5682 transitions. Word has length 76 [2020-11-11 15:13:04,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:04,404 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5682 transitions. [2020-11-11 15:13:04,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 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) [2020-11-11 15:13:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5682 transitions. [2020-11-11 15:13:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:13:04,407 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:04,407 INFO L494 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] [2020-11-11 15:13:04,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:04,611 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:04,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:04,611 INFO L82 PathProgramCache]: Analyzing trace with hash 62380387, now seen corresponding path program 50 times [2020-11-11 15:13:04,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:04,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159928403] [2020-11-11 15:13:04,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:04,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159928403] [2020-11-11 15:13:04,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91051569] [2020-11-11 15:13:04,787 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 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 [2020-11-11 15:13:04,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:04,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:04,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:04,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:04,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:04,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:04,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:13:04,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115628698] [2020-11-11 15:13:04,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:04,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:04,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:04,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:04,940 INFO L87 Difference]: Start difference. First operand 2052 states and 5682 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:05,889 INFO L93 Difference]: Finished difference Result 3207 states and 8440 transitions. [2020-11-11 15:13:05,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:13:05,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 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 76 [2020-11-11 15:13:05,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:05,893 INFO L225 Difference]: With dead ends: 3207 [2020-11-11 15:13:05,893 INFO L226 Difference]: Without dead ends: 2680 [2020-11-11 15:13:05,893 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:13:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2020-11-11 15:13:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2062. [2020-11-11 15:13:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:05,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:05,921 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 76 [2020-11-11 15:13:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:05,921 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:05,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:05,924 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:05,925 INFO L494 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] [2020-11-11 15:13:06,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:06,139 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:06,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1380054286, now seen corresponding path program 51 times [2020-11-11 15:13:06,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:06,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860253580] [2020-11-11 15:13:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:06,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860253580] [2020-11-11 15:13:06,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111354140] [2020-11-11 15:13:06,379 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 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 [2020-11-11 15:13:06,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:13:06,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:06,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:06,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:06,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:06,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:06,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:13:06,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635777877] [2020-11-11 15:13:06,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:06,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:06,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:06,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:06,525 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 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) [2020-11-11 15:13:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:07,043 INFO L93 Difference]: Finished difference Result 2905 states and 7500 transitions. [2020-11-11 15:13:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:13:07,044 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 81 [2020-11-11 15:13:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:07,048 INFO L225 Difference]: With dead ends: 2905 [2020-11-11 15:13:07,048 INFO L226 Difference]: Without dead ends: 2635 [2020-11-11 15:13:07,048 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:13:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2020-11-11 15:13:07,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2062. [2020-11-11 15:13:07,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:07,076 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:07,076 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:07,076 INFO L482 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) [2020-11-11 15:13:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:07,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:07,079 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:07,080 INFO L494 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] [2020-11-11 15:13:07,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:07,295 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:07,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:07,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1369620450, now seen corresponding path program 52 times [2020-11-11 15:13:07,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:07,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113374519] [2020-11-11 15:13:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:07,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113374519] [2020-11-11 15:13:07,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128368026] [2020-11-11 15:13:07,563 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 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 [2020-11-11 15:13:07,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:07,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:07,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:07,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:07,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:07,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:07,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:07,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:13:07,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902711622] [2020-11-11 15:13:07,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:07,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:07,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:07,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:07,726 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:08,341 INFO L93 Difference]: Finished difference Result 3100 states and 7890 transitions. [2020-11-11 15:13:08,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:13:08,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 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 81 [2020-11-11 15:13:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:08,345 INFO L225 Difference]: With dead ends: 3100 [2020-11-11 15:13:08,345 INFO L226 Difference]: Without dead ends: 2830 [2020-11-11 15:13:08,346 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 15:13:08,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2020-11-11 15:13:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2062. [2020-11-11 15:13:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:08,399 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:08,400 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:08,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:08,402 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:08,402 INFO L494 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] [2020-11-11 15:13:08,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:08,609 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:08,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:08,609 INFO L82 PathProgramCache]: Analyzing trace with hash 802454576, now seen corresponding path program 53 times [2020-11-11 15:13:08,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:08,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802663157] [2020-11-11 15:13:08,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:08,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802663157] [2020-11-11 15:13:08,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864982332] [2020-11-11 15:13:08,838 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 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 [2020-11-11 15:13:08,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:13:08,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:08,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:08,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:08,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:08,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:13:08,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482709523] [2020-11-11 15:13:08,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:08,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:08,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:08,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:08,995 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 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) [2020-11-11 15:13:09,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:09,551 INFO L93 Difference]: Finished difference Result 3055 states and 7800 transitions. [2020-11-11 15:13:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:13:09,552 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 81 [2020-11-11 15:13:09,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:09,556 INFO L225 Difference]: With dead ends: 3055 [2020-11-11 15:13:09,557 INFO L226 Difference]: Without dead ends: 2785 [2020-11-11 15:13:09,557 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 15:13:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2020-11-11 15:13:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2062. [2020-11-11 15:13:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:09,586 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:09,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:09,586 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:09,586 INFO L482 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) [2020-11-11 15:13:09,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:09,588 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:09,588 INFO L494 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] [2020-11-11 15:13:09,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-11-11 15:13:09,789 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:09,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:09,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1631165728, now seen corresponding path program 54 times [2020-11-11 15:13:09,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:09,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651861429] [2020-11-11 15:13:09,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:10,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651861429] [2020-11-11 15:13:10,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621841710] [2020-11-11 15:13:10,042 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 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 [2020-11-11 15:13:10,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:13:10,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:10,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:10,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:10,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:10,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:10,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:10,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:13:10,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713157] [2020-11-11 15:13:10,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:10,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:10,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:10,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:10,217 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:10,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:10,981 INFO L93 Difference]: Finished difference Result 3005 states and 7700 transitions. [2020-11-11 15:13:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:13:10,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 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 81 [2020-11-11 15:13:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:10,986 INFO L225 Difference]: With dead ends: 3005 [2020-11-11 15:13:10,986 INFO L226 Difference]: Without dead ends: 2735 [2020-11-11 15:13:10,987 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 15:13:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2020-11-11 15:13:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2062. [2020-11-11 15:13:11,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:11,016 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:11,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:11,016 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:11,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:11,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:11,018 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:11,018 INFO L494 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] [2020-11-11 15:13:11,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:11,219 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:11,220 INFO L82 PathProgramCache]: Analyzing trace with hash -91372818, now seen corresponding path program 55 times [2020-11-11 15:13:11,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:11,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707519909] [2020-11-11 15:13:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:11,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707519909] [2020-11-11 15:13:11,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482458934] [2020-11-11 15:13:11,527 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 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 [2020-11-11 15:13:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:11,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:11,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:11,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:11,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:11,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:13:11,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026909088] [2020-11-11 15:13:11,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:11,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:11,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:11,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:11,684 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 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) [2020-11-11 15:13:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:12,275 INFO L93 Difference]: Finished difference Result 2955 states and 7600 transitions. [2020-11-11 15:13:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:13:12,275 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 81 [2020-11-11 15:13:12,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:12,280 INFO L225 Difference]: With dead ends: 2955 [2020-11-11 15:13:12,280 INFO L226 Difference]: Without dead ends: 2685 [2020-11-11 15:13:12,281 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 15:13:12,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2020-11-11 15:13:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2062. [2020-11-11 15:13:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:12,325 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:12,325 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:12,325 INFO L482 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) [2020-11-11 15:13:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:12,328 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:12,328 INFO L494 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] [2020-11-11 15:13:12,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-11-11 15:13:12,542 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:12,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:12,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1630908450, now seen corresponding path program 56 times [2020-11-11 15:13:12,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:12,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709799590] [2020-11-11 15:13:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:12,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709799590] [2020-11-11 15:13:12,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350758667] [2020-11-11 15:13:12,777 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 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 [2020-11-11 15:13:12,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:12,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:12,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:12,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:12,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:12,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:12,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:12,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:13:12,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090782345] [2020-11-11 15:13:12,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:12,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:12,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:12,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:12,937 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:13,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:13,737 INFO L93 Difference]: Finished difference Result 2905 states and 7500 transitions. [2020-11-11 15:13:13,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:13,738 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 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 81 [2020-11-11 15:13:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:13,741 INFO L225 Difference]: With dead ends: 2905 [2020-11-11 15:13:13,741 INFO L226 Difference]: Without dead ends: 2635 [2020-11-11 15:13:13,742 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:13:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2020-11-11 15:13:13,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2062. [2020-11-11 15:13:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:13,773 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:13,773 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:13,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:13,776 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:13,776 INFO L494 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] [2020-11-11 15:13:13,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:13,990 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:13,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:13,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1307492140, now seen corresponding path program 57 times [2020-11-11 15:13:13,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:13,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778653179] [2020-11-11 15:13:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:14,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778653179] [2020-11-11 15:13:14,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18166325] [2020-11-11 15:13:14,226 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 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 [2020-11-11 15:13:14,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:13:14,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:14,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:14,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:14,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:14,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:14,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:13:14,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38767598] [2020-11-11 15:13:14,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:14,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:14,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:14,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:14,373 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 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) [2020-11-11 15:13:15,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:15,056 INFO L93 Difference]: Finished difference Result 2855 states and 7400 transitions. [2020-11-11 15:13:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:13:15,057 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 81 [2020-11-11 15:13:15,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:15,061 INFO L225 Difference]: With dead ends: 2855 [2020-11-11 15:13:15,062 INFO L226 Difference]: Without dead ends: 2585 [2020-11-11 15:13:15,062 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:13:15,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2020-11-11 15:13:15,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2062. [2020-11-11 15:13:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:15,106 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:15,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:15,106 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:15,106 INFO L482 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) [2020-11-11 15:13:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:15,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:15,109 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:15,109 INFO L494 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] [2020-11-11 15:13:15,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-11 15:13:15,323 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:15,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:15,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1155942372, now seen corresponding path program 58 times [2020-11-11 15:13:15,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:15,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545506128] [2020-11-11 15:13:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:15,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545506128] [2020-11-11 15:13:15,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765139831] [2020-11-11 15:13:15,544 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 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 [2020-11-11 15:13:15,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:15,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:15,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:15,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:15,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:15,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:15,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:15,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:13:15,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27707570] [2020-11-11 15:13:15,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:15,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:15,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:15,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:15,716 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:16,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:16,673 INFO L93 Difference]: Finished difference Result 2850 states and 7410 transitions. [2020-11-11 15:13:16,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:13:16,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 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 81 [2020-11-11 15:13:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:16,677 INFO L225 Difference]: With dead ends: 2850 [2020-11-11 15:13:16,678 INFO L226 Difference]: Without dead ends: 2580 [2020-11-11 15:13:16,678 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:13:16,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2020-11-11 15:13:16,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2062. [2020-11-11 15:13:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7612809315866085) internal successors, (5691), 2061 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5691 transitions. [2020-11-11 15:13:16,707 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5691 transitions. Word has length 81 [2020-11-11 15:13:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:16,708 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5691 transitions. [2020-11-11 15:13:16,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5691 transitions. [2020-11-11 15:13:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:16,710 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:16,710 INFO L494 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] [2020-11-11 15:13:16,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:16,911 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:16,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:16,911 INFO L82 PathProgramCache]: Analyzing trace with hash -527150870, now seen corresponding path program 59 times [2020-11-11 15:13:16,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:16,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550587753] [2020-11-11 15:13:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:17,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550587753] [2020-11-11 15:13:17,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608265652] [2020-11-11 15:13:17,132 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 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 [2020-11-11 15:13:17,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:13:17,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:17,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:17,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:17,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:17,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:17,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:13:17,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405046721] [2020-11-11 15:13:17,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:17,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:17,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:17,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:17,272 INFO L87 Difference]: Start difference. First operand 2062 states and 5691 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) [2020-11-11 15:13:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:18,024 INFO L93 Difference]: Finished difference Result 3912 states and 10494 transitions. [2020-11-11 15:13:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:13:18,025 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 81 [2020-11-11 15:13:18,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:18,030 INFO L225 Difference]: With dead ends: 3912 [2020-11-11 15:13:18,030 INFO L226 Difference]: Without dead ends: 3642 [2020-11-11 15:13:18,031 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:13:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2020-11-11 15:13:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 2187. [2020-11-11 15:13:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 2.7822506861848124) internal successors, (6082), 2186 states have internal predecessors, (6082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 6082 transitions. [2020-11-11 15:13:18,068 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 6082 transitions. Word has length 81 [2020-11-11 15:13:18,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:18,068 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 6082 transitions. [2020-11-11 15:13:18,068 INFO L482 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) [2020-11-11 15:13:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 6082 transitions. [2020-11-11 15:13:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:18,071 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:18,071 INFO L494 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] [2020-11-11 15:13:18,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:18,272 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1184057084, now seen corresponding path program 60 times [2020-11-11 15:13:18,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:18,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130564493] [2020-11-11 15:13:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:18,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130564493] [2020-11-11 15:13:18,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555206446] [2020-11-11 15:13:18,474 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 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 [2020-11-11 15:13:18,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:13:18,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:18,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:18,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:18,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:18,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:18,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:13:18,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065937750] [2020-11-11 15:13:18,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:18,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:18,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:18,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:18,652 INFO L87 Difference]: Start difference. First operand 2187 states and 6082 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 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) [2020-11-11 15:13:19,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:19,748 INFO L93 Difference]: Finished difference Result 3307 states and 8740 transitions. [2020-11-11 15:13:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:13:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 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 81 [2020-11-11 15:13:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:19,755 INFO L225 Difference]: With dead ends: 3307 [2020-11-11 15:13:19,755 INFO L226 Difference]: Without dead ends: 2780 [2020-11-11 15:13:19,756 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=521, Invalid=1641, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:13:19,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2020-11-11 15:13:19,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 1601. [2020-11-11 15:13:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 2.69875) internal successors, (4318), 1600 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 4318 transitions. [2020-11-11 15:13:19,803 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 4318 transitions. Word has length 81 [2020-11-11 15:13:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:19,804 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 4318 transitions. [2020-11-11 15:13:19,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 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) [2020-11-11 15:13:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 4318 transitions. [2020-11-11 15:13:19,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:19,806 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:19,806 INFO L494 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] [2020-11-11 15:13:20,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-11-11 15:13:20,021 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:20,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1440295804, now seen corresponding path program 61 times [2020-11-11 15:13:20,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:20,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482220150] [2020-11-11 15:13:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:20,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482220150] [2020-11-11 15:13:20,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467695974] [2020-11-11 15:13:20,318 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 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 [2020-11-11 15:13:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:20,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:20,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:20,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:20,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:20,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:20,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2020-11-11 15:13:20,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796418753] [2020-11-11 15:13:20,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:20,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:20,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:20,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:20,499 INFO L87 Difference]: Start difference. First operand 1601 states and 4318 transitions. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 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) [2020-11-11 15:13:21,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:21,128 INFO L93 Difference]: Finished difference Result 2669 states and 6902 transitions. [2020-11-11 15:13:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:13:21,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 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 86 [2020-11-11 15:13:21,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:21,132 INFO L225 Difference]: With dead ends: 2669 [2020-11-11 15:13:21,133 INFO L226 Difference]: Without dead ends: 2335 [2020-11-11 15:13:21,133 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=386, Invalid=1096, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:13:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2020-11-11 15:13:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 1686. [2020-11-11 15:13:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.6635014836795254) internal successors, (4488), 1685 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 4488 transitions. [2020-11-11 15:13:21,162 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 4488 transitions. Word has length 86 [2020-11-11 15:13:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:21,163 INFO L481 AbstractCegarLoop]: Abstraction has 1686 states and 4488 transitions. [2020-11-11 15:13:21,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 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) [2020-11-11 15:13:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 4488 transitions. [2020-11-11 15:13:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:21,164 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:21,165 INFO L494 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] [2020-11-11 15:13:21,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:21,365 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:21,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:21,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1109041322, now seen corresponding path program 62 times [2020-11-11 15:13:21,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:21,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727141132] [2020-11-11 15:13:21,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:21,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727141132] [2020-11-11 15:13:21,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154463674] [2020-11-11 15:13:21,668 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 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 [2020-11-11 15:13:21,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:21,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:21,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:21,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:21,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:21,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:21,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:13:21,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855824161] [2020-11-11 15:13:21,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:21,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:21,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:21,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:21,814 INFO L87 Difference]: Start difference. First operand 1686 states and 4488 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) [2020-11-11 15:13:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:22,270 INFO L93 Difference]: Finished difference Result 3020 states and 7370 transitions. [2020-11-11 15:13:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:13:22,271 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 86 [2020-11-11 15:13:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:22,276 INFO L225 Difference]: With dead ends: 3020 [2020-11-11 15:13:22,276 INFO L226 Difference]: Without dead ends: 2750 [2020-11-11 15:13:22,276 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:13:22,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-11-11 15:13:22,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1787. [2020-11-11 15:13:22,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.674132138857783) internal successors, (4776), 1786 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 4776 transitions. [2020-11-11 15:13:22,306 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 4776 transitions. Word has length 86 [2020-11-11 15:13:22,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:22,306 INFO L481 AbstractCegarLoop]: Abstraction has 1787 states and 4776 transitions. [2020-11-11 15:13:22,306 INFO L482 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) [2020-11-11 15:13:22,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 4776 transitions. [2020-11-11 15:13:22,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:22,308 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:22,308 INFO L494 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] [2020-11-11 15:13:22,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:22,509 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:22,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:22,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1122637414, now seen corresponding path program 63 times [2020-11-11 15:13:22,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:22,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233404528] [2020-11-11 15:13:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:22,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233404528] [2020-11-11 15:13:22,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043637590] [2020-11-11 15:13:22,835 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 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 [2020-11-11 15:13:22,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:13:22,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:22,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:22,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:22,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:22,994 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:23,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:23,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:13:23,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833047116] [2020-11-11 15:13:23,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:23,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:23,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:23,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:23,010 INFO L87 Difference]: Start difference. First operand 1787 states and 4776 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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) [2020-11-11 15:13:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:23,685 INFO L93 Difference]: Finished difference Result 2955 states and 7290 transitions. [2020-11-11 15:13:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:13:23,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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 86 [2020-11-11 15:13:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:23,690 INFO L225 Difference]: With dead ends: 2955 [2020-11-11 15:13:23,690 INFO L226 Difference]: Without dead ends: 2685 [2020-11-11 15:13:23,691 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:13:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2020-11-11 15:13:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1837. [2020-11-11 15:13:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 2.683006535947712) internal successors, (4926), 1836 states have internal predecessors, (4926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 4926 transitions. [2020-11-11 15:13:23,720 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 4926 transitions. Word has length 86 [2020-11-11 15:13:23,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:23,720 INFO L481 AbstractCegarLoop]: Abstraction has 1837 states and 4926 transitions. [2020-11-11 15:13:23,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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) [2020-11-11 15:13:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 4926 transitions. [2020-11-11 15:13:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:23,722 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:23,722 INFO L494 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] [2020-11-11 15:13:23,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-11-11 15:13:23,923 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:23,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:23,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1560601496, now seen corresponding path program 64 times [2020-11-11 15:13:23,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:23,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361318721] [2020-11-11 15:13:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:24,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361318721] [2020-11-11 15:13:24,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126065133] [2020-11-11 15:13:24,202 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 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 [2020-11-11 15:13:24,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:24,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:24,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:24,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:24,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:24,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:24,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:13:24,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462494322] [2020-11-11 15:13:24,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:24,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:24,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:24,344 INFO L87 Difference]: Start difference. First operand 1837 states and 4926 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) [2020-11-11 15:13:24,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:24,912 INFO L93 Difference]: Finished difference Result 2980 states and 7390 transitions. [2020-11-11 15:13:24,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:13:24,912 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 86 [2020-11-11 15:13:24,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:24,916 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:13:24,917 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:13:24,919 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:13:24,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:13:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1887. [2020-11-11 15:13:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.6914103923647934) internal successors, (5076), 1886 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5076 transitions. [2020-11-11 15:13:24,950 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5076 transitions. Word has length 86 [2020-11-11 15:13:24,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:24,950 INFO L481 AbstractCegarLoop]: Abstraction has 1887 states and 5076 transitions. [2020-11-11 15:13:24,950 INFO L482 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) [2020-11-11 15:13:24,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5076 transitions. [2020-11-11 15:13:24,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:24,952 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:24,952 INFO L494 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] [2020-11-11 15:13:25,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:25,153 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:25,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1189073240, now seen corresponding path program 65 times [2020-11-11 15:13:25,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:25,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612840718] [2020-11-11 15:13:25,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:25,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612840718] [2020-11-11 15:13:25,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214337137] [2020-11-11 15:13:25,464 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 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 [2020-11-11 15:13:25,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:13:25,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:25,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:25,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:25,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:25,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:25,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:25,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:13:25,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314713724] [2020-11-11 15:13:25,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:25,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:25,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:25,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:25,654 INFO L87 Difference]: Start difference. First operand 1887 states and 5076 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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) [2020-11-11 15:13:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:26,423 INFO L93 Difference]: Finished difference Result 2980 states and 7440 transitions. [2020-11-11 15:13:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:13:26,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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 86 [2020-11-11 15:13:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:26,428 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:13:26,428 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:13:26,428 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:13:26,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:13:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1937. [2020-11-11 15:13:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 2.699380165289256) internal successors, (5226), 1936 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 5226 transitions. [2020-11-11 15:13:26,463 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 5226 transitions. Word has length 86 [2020-11-11 15:13:26,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:26,464 INFO L481 AbstractCegarLoop]: Abstraction has 1937 states and 5226 transitions. [2020-11-11 15:13:26,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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) [2020-11-11 15:13:26,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 5226 transitions. [2020-11-11 15:13:26,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:26,466 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:26,466 INFO L494 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] [2020-11-11 15:13:26,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-11-11 15:13:26,681 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:26,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:26,681 INFO L82 PathProgramCache]: Analyzing trace with hash 621907366, now seen corresponding path program 66 times [2020-11-11 15:13:26,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:26,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230296337] [2020-11-11 15:13:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:26,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230296337] [2020-11-11 15:13:26,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896659619] [2020-11-11 15:13:26,953 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 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 [2020-11-11 15:13:27,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:13:27,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:27,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:27,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:27,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:27,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:27,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:13:27,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054265527] [2020-11-11 15:13:27,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:27,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:27,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:27,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:27,092 INFO L87 Difference]: Start difference. First operand 1937 states and 5226 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) [2020-11-11 15:13:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:27,770 INFO L93 Difference]: Finished difference Result 2980 states and 7490 transitions. [2020-11-11 15:13:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:13:27,770 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 86 [2020-11-11 15:13:27,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:27,775 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:13:27,775 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:13:27,776 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:13:27,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:13:27,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1987. [2020-11-11 15:13:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 2.706948640483384) internal successors, (5376), 1986 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 5376 transitions. [2020-11-11 15:13:27,807 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 5376 transitions. Word has length 86 [2020-11-11 15:13:27,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:27,807 INFO L481 AbstractCegarLoop]: Abstraction has 1987 states and 5376 transitions. [2020-11-11 15:13:27,807 INFO L482 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) [2020-11-11 15:13:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 5376 transitions. [2020-11-11 15:13:27,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:27,809 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:27,809 INFO L494 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] [2020-11-11 15:13:28,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-11 15:13:28,011 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:28,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:28,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1450618518, now seen corresponding path program 67 times [2020-11-11 15:13:28,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:28,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629691730] [2020-11-11 15:13:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:28,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629691730] [2020-11-11 15:13:28,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24491640] [2020-11-11 15:13:28,310 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 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 [2020-11-11 15:13:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:28,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:28,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:28,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:28,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:28,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:28,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:13:28,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644620541] [2020-11-11 15:13:28,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:28,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:28,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:28,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:28,481 INFO L87 Difference]: Start difference. First operand 1987 states and 5376 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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) [2020-11-11 15:13:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:29,375 INFO L93 Difference]: Finished difference Result 2980 states and 7540 transitions. [2020-11-11 15:13:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:29,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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 86 [2020-11-11 15:13:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:29,380 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:13:29,380 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:13:29,380 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:13:29,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:13:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2037. [2020-11-11 15:13:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2037 states, 2036 states have (on average 2.7141453831041256) internal successors, (5526), 2036 states have internal predecessors, (5526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 5526 transitions. [2020-11-11 15:13:29,413 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 5526 transitions. Word has length 86 [2020-11-11 15:13:29,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:29,413 INFO L481 AbstractCegarLoop]: Abstraction has 2037 states and 5526 transitions. [2020-11-11 15:13:29,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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) [2020-11-11 15:13:29,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 5526 transitions. [2020-11-11 15:13:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:29,415 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:29,415 INFO L494 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] [2020-11-11 15:13:29,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-11-11 15:13:29,616 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:29,617 INFO L82 PathProgramCache]: Analyzing trace with hash -271920028, now seen corresponding path program 68 times [2020-11-11 15:13:29,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:29,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942847134] [2020-11-11 15:13:29,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:29,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942847134] [2020-11-11 15:13:29,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418732970] [2020-11-11 15:13:29,881 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 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 [2020-11-11 15:13:29,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:29,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:29,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:29,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:30,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:30,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:30,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:13:30,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180667061] [2020-11-11 15:13:30,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:30,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:30,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:30,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:30,018 INFO L87 Difference]: Start difference. First operand 2037 states and 5526 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) [2020-11-11 15:13:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:30,769 INFO L93 Difference]: Finished difference Result 2980 states and 7590 transitions. [2020-11-11 15:13:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:13:30,770 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 86 [2020-11-11 15:13:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:30,774 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:13:30,774 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:13:30,775 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:13:30,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:13:30,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2087. [2020-11-11 15:13:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 2.7209971236816872) internal successors, (5676), 2086 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 5676 transitions. [2020-11-11 15:13:30,808 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 5676 transitions. Word has length 86 [2020-11-11 15:13:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:30,808 INFO L481 AbstractCegarLoop]: Abstraction has 2087 states and 5676 transitions. [2020-11-11 15:13:30,808 INFO L482 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) [2020-11-11 15:13:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 5676 transitions. [2020-11-11 15:13:30,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:30,810 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:30,810 INFO L494 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] [2020-11-11 15:13:31,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:31,011 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:31,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1811455660, now seen corresponding path program 69 times [2020-11-11 15:13:31,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:31,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536724548] [2020-11-11 15:13:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:31,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536724548] [2020-11-11 15:13:31,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341830557] [2020-11-11 15:13:31,299 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 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 [2020-11-11 15:13:31,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:13:31,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:31,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:13:31,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:31,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:31,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:31,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:13:31,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151012284] [2020-11-11 15:13:31,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:31,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:31,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:31,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:31,483 INFO L87 Difference]: Start difference. First operand 2087 states and 5676 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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) [2020-11-11 15:13:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:32,444 INFO L93 Difference]: Finished difference Result 2980 states and 7640 transitions. [2020-11-11 15:13:32,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:32,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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 86 [2020-11-11 15:13:32,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:32,449 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:13:32,450 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:13:32,450 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=376, Invalid=1264, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:13:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:13:32,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2137. [2020-11-11 15:13:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 2.7275280898876404) internal successors, (5826), 2136 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:32,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 5826 transitions. [2020-11-11 15:13:32,489 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 5826 transitions. Word has length 86 [2020-11-11 15:13:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:32,489 INFO L481 AbstractCegarLoop]: Abstraction has 2137 states and 5826 transitions. [2020-11-11 15:13:32,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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) [2020-11-11 15:13:32,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 5826 transitions. [2020-11-11 15:13:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:32,491 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:32,491 INFO L494 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] [2020-11-11 15:13:32,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:32,692 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:32,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1126944930, now seen corresponding path program 70 times [2020-11-11 15:13:32,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:32,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711244683] [2020-11-11 15:13:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:32,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711244683] [2020-11-11 15:13:32,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466872881] [2020-11-11 15:13:32,941 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 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 [2020-11-11 15:13:33,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:33,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:33,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:33,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:33,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:33,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:33,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:13:33,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83242890] [2020-11-11 15:13:33,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:33,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:33,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:33,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:33,087 INFO L87 Difference]: Start difference. First operand 2137 states and 5826 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) [2020-11-11 15:13:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:33,913 INFO L93 Difference]: Finished difference Result 3010 states and 7765 transitions. [2020-11-11 15:13:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:13:33,913 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 86 [2020-11-11 15:13:33,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:33,918 INFO L225 Difference]: With dead ends: 3010 [2020-11-11 15:13:33,918 INFO L226 Difference]: Without dead ends: 2740 [2020-11-11 15:13:33,918 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:13:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2020-11-11 15:13:33,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 2187. [2020-11-11 15:13:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 2.738334858188472) internal successors, (5986), 2186 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 5986 transitions. [2020-11-11 15:13:33,967 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 5986 transitions. Word has length 86 [2020-11-11 15:13:33,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:33,967 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 5986 transitions. [2020-11-11 15:13:33,967 INFO L482 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) [2020-11-11 15:13:33,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 5986 transitions. [2020-11-11 15:13:33,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:33,969 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:33,969 INFO L494 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] [2020-11-11 15:13:34,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:34,170 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:34,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1336489582, now seen corresponding path program 71 times [2020-11-11 15:13:34,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:34,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872963706] [2020-11-11 15:13:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:34,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872963706] [2020-11-11 15:13:34,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124533445] [2020-11-11 15:13:34,429 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 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 [2020-11-11 15:13:34,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:13:34,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:34,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:34,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:34,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:34,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:34,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:34,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:13:34,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747912355] [2020-11-11 15:13:34,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:34,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:34,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:34,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:34,608 INFO L87 Difference]: Start difference. First operand 2187 states and 5986 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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) [2020-11-11 15:13:35,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:35,843 INFO L93 Difference]: Finished difference Result 3469 states and 9034 transitions. [2020-11-11 15:13:35,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:13:35,844 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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 86 [2020-11-11 15:13:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:35,848 INFO L225 Difference]: With dead ends: 3469 [2020-11-11 15:13:35,849 INFO L226 Difference]: Without dead ends: 2900 [2020-11-11 15:13:35,849 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=534, Invalid=1628, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:13:35,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2020-11-11 15:13:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2237. [2020-11-11 15:13:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 2.7464221824686943) internal successors, (6141), 2236 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:35,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 6141 transitions. [2020-11-11 15:13:35,882 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 6141 transitions. Word has length 86 [2020-11-11 15:13:35,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:35,882 INFO L481 AbstractCegarLoop]: Abstraction has 2237 states and 6141 transitions. [2020-11-11 15:13:35,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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) [2020-11-11 15:13:35,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 6141 transitions. [2020-11-11 15:13:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:35,884 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:35,884 INFO L494 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] [2020-11-11 15:13:36,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:36,085 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:36,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:36,086 INFO L82 PathProgramCache]: Analyzing trace with hash -707698080, now seen corresponding path program 72 times [2020-11-11 15:13:36,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:36,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340683697] [2020-11-11 15:13:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:36,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340683697] [2020-11-11 15:13:36,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156291179] [2020-11-11 15:13:36,333 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 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 [2020-11-11 15:13:36,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:13:36,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:36,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:36,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:36,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:36,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:36,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:13:36,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086650775] [2020-11-11 15:13:36,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:36,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:36,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:36,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:36,488 INFO L87 Difference]: Start difference. First operand 2237 states and 6141 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) [2020-11-11 15:13:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:37,404 INFO L93 Difference]: Finished difference Result 4112 states and 10994 transitions. [2020-11-11 15:13:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:13:37,404 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 86 [2020-11-11 15:13:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:37,409 INFO L225 Difference]: With dead ends: 4112 [2020-11-11 15:13:37,410 INFO L226 Difference]: Without dead ends: 3842 [2020-11-11 15:13:37,410 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 15:13:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3842 states. [2020-11-11 15:13:37,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3842 to 2362. [2020-11-11 15:13:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2361 states have (on average 2.7666243117323166) internal successors, (6532), 2361 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 6532 transitions. [2020-11-11 15:13:37,449 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 6532 transitions. Word has length 86 [2020-11-11 15:13:37,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:37,449 INFO L481 AbstractCegarLoop]: Abstraction has 2362 states and 6532 transitions. [2020-11-11 15:13:37,449 INFO L482 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) [2020-11-11 15:13:37,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 6532 transitions. [2020-11-11 15:13:37,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:37,451 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:37,451 INFO L494 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] [2020-11-11 15:13:37,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-11-11 15:13:37,652 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:37,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:37,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1003509874, now seen corresponding path program 73 times [2020-11-11 15:13:37,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:37,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70160099] [2020-11-11 15:13:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:37,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70160099] [2020-11-11 15:13:37,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940751807] [2020-11-11 15:13:37,895 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 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 [2020-11-11 15:13:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:37,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:37,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:38,011 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:38,030 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:38,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:38,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:13:38,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551257917] [2020-11-11 15:13:38,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:38,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:38,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:38,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:38,044 INFO L87 Difference]: Start difference. First operand 2362 states and 6532 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) [2020-11-11 15:13:39,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:39,224 INFO L93 Difference]: Finished difference Result 3151 states and 8350 transitions. [2020-11-11 15:13:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:13:39,225 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 86 [2020-11-11 15:13:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:39,230 INFO L225 Difference]: With dead ends: 3151 [2020-11-11 15:13:39,230 INFO L226 Difference]: Without dead ends: 2680 [2020-11-11 15:13:39,231 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:13:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2020-11-11 15:13:39,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1752. [2020-11-11 15:13:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.6990291262135924) internal successors, (4726), 1751 states have internal predecessors, (4726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:39,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4726 transitions. [2020-11-11 15:13:39,274 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4726 transitions. Word has length 86 [2020-11-11 15:13:39,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:39,274 INFO L481 AbstractCegarLoop]: Abstraction has 1752 states and 4726 transitions. [2020-11-11 15:13:39,274 INFO L482 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) [2020-11-11 15:13:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4726 transitions. [2020-11-11 15:13:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:39,277 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:39,277 INFO L494 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] [2020-11-11 15:13:39,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:39,492 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:39,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1275110147, now seen corresponding path program 74 times [2020-11-11 15:13:39,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:39,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947606291] [2020-11-11 15:13:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:39,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947606291] [2020-11-11 15:13:39,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265904374] [2020-11-11 15:13:39,823 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 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 [2020-11-11 15:13:39,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:39,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:39,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:39,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:39,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:39,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:39,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:13:39,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103739749] [2020-11-11 15:13:39,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:39,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:39,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:39,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:39,997 INFO L87 Difference]: Start difference. First operand 1752 states and 4726 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:40,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:40,625 INFO L93 Difference]: Finished difference Result 2745 states and 6890 transitions. [2020-11-11 15:13:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:13:40,628 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2020-11-11 15:13:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:40,631 INFO L225 Difference]: With dead ends: 2745 [2020-11-11 15:13:40,632 INFO L226 Difference]: Without dead ends: 2475 [2020-11-11 15:13:40,632 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=998, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:13:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2020-11-11 15:13:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 1802. [2020-11-11 15:13:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 2.707384786229872) internal successors, (4876), 1801 states have internal predecessors, (4876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:40,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 4876 transitions. [2020-11-11 15:13:40,661 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 4876 transitions. Word has length 91 [2020-11-11 15:13:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:40,661 INFO L481 AbstractCegarLoop]: Abstraction has 1802 states and 4876 transitions. [2020-11-11 15:13:40,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:40,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 4876 transitions. [2020-11-11 15:13:40,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:40,664 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:40,664 INFO L494 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] [2020-11-11 15:13:40,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:40,865 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:40,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:40,866 INFO L82 PathProgramCache]: Analyzing trace with hash -956568589, now seen corresponding path program 75 times [2020-11-11 15:13:40,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:40,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834570725] [2020-11-11 15:13:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:41,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834570725] [2020-11-11 15:13:41,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71042719] [2020-11-11 15:13:41,202 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 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 [2020-11-11 15:13:41,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:13:41,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:41,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:41,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:41,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:41,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:41,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:41,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:13:41,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588162045] [2020-11-11 15:13:41,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:41,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:41,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:41,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:41,404 INFO L87 Difference]: Start difference. First operand 1802 states and 4876 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:13:42,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:42,165 INFO L93 Difference]: Finished difference Result 3040 states and 7530 transitions. [2020-11-11 15:13:42,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:13:42,166 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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 91 [2020-11-11 15:13:42,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:42,170 INFO L225 Difference]: With dead ends: 3040 [2020-11-11 15:13:42,170 INFO L226 Difference]: Without dead ends: 2770 [2020-11-11 15:13:42,171 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:13:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2020-11-11 15:13:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1852. [2020-11-11 15:13:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.7152890329551593) internal successors, (5026), 1851 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5026 transitions. [2020-11-11 15:13:42,200 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5026 transitions. Word has length 91 [2020-11-11 15:13:42,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:42,200 INFO L481 AbstractCegarLoop]: Abstraction has 1852 states and 5026 transitions. [2020-11-11 15:13:42,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:13:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5026 transitions. [2020-11-11 15:13:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:42,203 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:42,203 INFO L494 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] [2020-11-11 15:13:42,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:42,419 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:42,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1394532671, now seen corresponding path program 76 times [2020-11-11 15:13:42,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:42,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53807309] [2020-11-11 15:13:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:42,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53807309] [2020-11-11 15:13:42,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406562665] [2020-11-11 15:13:42,728 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 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 [2020-11-11 15:13:42,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:42,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:42,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:42,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:42,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:42,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:42,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:13:42,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496729715] [2020-11-11 15:13:42,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:42,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:42,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:42,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:42,900 INFO L87 Difference]: Start difference. First operand 1852 states and 5026 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:43,626 INFO L93 Difference]: Finished difference Result 3045 states and 7590 transitions. [2020-11-11 15:13:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:13:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2020-11-11 15:13:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:43,631 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:13:43,631 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:13:43,631 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=1176, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:13:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:13:43,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 1902. [2020-11-11 15:13:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.7227774855339297) internal successors, (5176), 1901 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5176 transitions. [2020-11-11 15:13:43,662 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5176 transitions. Word has length 91 [2020-11-11 15:13:43,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:43,662 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 5176 transitions. [2020-11-11 15:13:43,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:43,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5176 transitions. [2020-11-11 15:13:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:43,664 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:43,664 INFO L494 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] [2020-11-11 15:13:43,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:43,865 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:43,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1355142065, now seen corresponding path program 77 times [2020-11-11 15:13:43,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:43,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874937959] [2020-11-11 15:13:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:44,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874937959] [2020-11-11 15:13:44,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137610009] [2020-11-11 15:13:44,193 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 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 [2020-11-11 15:13:44,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:13:44,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:44,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:44,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:44,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:44,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:44,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:44,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:13:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018980644] [2020-11-11 15:13:44,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:44,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:44,372 INFO L87 Difference]: Start difference. First operand 1902 states and 5176 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:13:45,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:45,291 INFO L93 Difference]: Finished difference Result 3045 states and 7640 transitions. [2020-11-11 15:13:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:45,291 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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 91 [2020-11-11 15:13:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:45,295 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:13:45,295 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:13:45,296 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:13:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:13:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 1952. [2020-11-11 15:13:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 2.7298821117375707) internal successors, (5326), 1951 states have internal predecessors, (5326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:45,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 5326 transitions. [2020-11-11 15:13:45,327 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 5326 transitions. Word has length 91 [2020-11-11 15:13:45,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:45,327 INFO L481 AbstractCegarLoop]: Abstraction has 1952 states and 5326 transitions. [2020-11-11 15:13:45,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:13:45,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 5326 transitions. [2020-11-11 15:13:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:45,329 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:45,329 INFO L494 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] [2020-11-11 15:13:45,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-11-11 15:13:45,530 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:45,530 INFO L82 PathProgramCache]: Analyzing trace with hash 787976191, now seen corresponding path program 78 times [2020-11-11 15:13:45,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:45,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281254937] [2020-11-11 15:13:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:45,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281254937] [2020-11-11 15:13:45,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953334460] [2020-11-11 15:13:45,851 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 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 [2020-11-11 15:13:45,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:13:45,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:45,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:45,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:46,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:46,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:46,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:13:46,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469958998] [2020-11-11 15:13:46,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:46,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:46,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:46,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:46,023 INFO L87 Difference]: Start difference. First operand 1952 states and 5326 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:46,825 INFO L93 Difference]: Finished difference Result 3045 states and 7690 transitions. [2020-11-11 15:13:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:13:46,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2020-11-11 15:13:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:46,830 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:13:46,831 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:13:46,831 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:13:46,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:13:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2002. [2020-11-11 15:13:46,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 2.736631684157921) internal successors, (5476), 2001 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 5476 transitions. [2020-11-11 15:13:46,863 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 5476 transitions. Word has length 91 [2020-11-11 15:13:46,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:46,863 INFO L481 AbstractCegarLoop]: Abstraction has 2002 states and 5476 transitions. [2020-11-11 15:13:46,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:46,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 5476 transitions. [2020-11-11 15:13:46,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:46,865 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:46,865 INFO L494 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] [2020-11-11 15:13:47,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-11 15:13:47,066 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:47,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:47,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1616687343, now seen corresponding path program 79 times [2020-11-11 15:13:47,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:47,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888127338] [2020-11-11 15:13:47,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:47,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888127338] [2020-11-11 15:13:47,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720830385] [2020-11-11 15:13:47,377 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 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 [2020-11-11 15:13:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:47,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:47,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:47,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:47,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:47,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:47,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:13:47,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940036533] [2020-11-11 15:13:47,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:47,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:47,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:47,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:47,556 INFO L87 Difference]: Start difference. First operand 2002 states and 5476 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:13:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:48,544 INFO L93 Difference]: Finished difference Result 3045 states and 7740 transitions. [2020-11-11 15:13:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:13:48,545 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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 91 [2020-11-11 15:13:48,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:48,548 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:13:48,548 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:13:48,549 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:13:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:13:48,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2052. [2020-11-11 15:13:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 2.74305216967333) internal successors, (5626), 2051 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5626 transitions. [2020-11-11 15:13:48,599 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5626 transitions. Word has length 91 [2020-11-11 15:13:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:48,599 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5626 transitions. [2020-11-11 15:13:48,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:13:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5626 transitions. [2020-11-11 15:13:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:48,601 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:48,601 INFO L494 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] [2020-11-11 15:13:48,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:48,802 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:48,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:48,803 INFO L82 PathProgramCache]: Analyzing trace with hash -105851203, now seen corresponding path program 80 times [2020-11-11 15:13:48,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:48,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725763175] [2020-11-11 15:13:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:49,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725763175] [2020-11-11 15:13:49,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260238673] [2020-11-11 15:13:49,088 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 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 [2020-11-11 15:13:49,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:49,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:49,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:49,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:49,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:49,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:49,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:13:49,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809337487] [2020-11-11 15:13:49,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:49,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:49,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:49,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:49,255 INFO L87 Difference]: Start difference. First operand 2052 states and 5626 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:50,145 INFO L93 Difference]: Finished difference Result 3045 states and 7790 transitions. [2020-11-11 15:13:50,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:13:50,145 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2020-11-11 15:13:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:50,150 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:13:50,150 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:13:50,150 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=482, Invalid=1410, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:13:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:13:50,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2102. [2020-11-11 15:13:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2101 states have (on average 2.749167063303189) internal successors, (5776), 2101 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 5776 transitions. [2020-11-11 15:13:50,185 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 5776 transitions. Word has length 91 [2020-11-11 15:13:50,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:50,186 INFO L481 AbstractCegarLoop]: Abstraction has 2102 states and 5776 transitions. [2020-11-11 15:13:50,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 5776 transitions. [2020-11-11 15:13:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:50,194 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:50,194 INFO L494 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] [2020-11-11 15:13:50,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:50,409 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:50,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1645386835, now seen corresponding path program 81 times [2020-11-11 15:13:50,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:50,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718533461] [2020-11-11 15:13:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:50,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718533461] [2020-11-11 15:13:50,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578398405] [2020-11-11 15:13:50,709 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 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 [2020-11-11 15:13:50,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:13:50,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:50,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:13:50,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:50,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:50,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:50,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:13:50,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479597699] [2020-11-11 15:13:50,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:50,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:50,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:50,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:50,887 INFO L87 Difference]: Start difference. First operand 2102 states and 5776 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:13:52,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:52,017 INFO L93 Difference]: Finished difference Result 3045 states and 7840 transitions. [2020-11-11 15:13:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:13:52,018 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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 91 [2020-11-11 15:13:52,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:52,021 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:13:52,022 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:13:52,022 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=488, Invalid=1582, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:13:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:13:52,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2152. [2020-11-11 15:13:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 2.7549976754997676) internal successors, (5926), 2151 states have internal predecessors, (5926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 5926 transitions. [2020-11-11 15:13:52,057 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 5926 transitions. Word has length 91 [2020-11-11 15:13:52,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:52,058 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 5926 transitions. [2020-11-11 15:13:52,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:13:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 5926 transitions. [2020-11-11 15:13:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:52,060 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:52,060 INFO L494 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] [2020-11-11 15:13:52,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:52,261 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:52,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:52,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1293013755, now seen corresponding path program 82 times [2020-11-11 15:13:52,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:52,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151722291] [2020-11-11 15:13:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:52,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151722291] [2020-11-11 15:13:52,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625489438] [2020-11-11 15:13:52,532 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 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 [2020-11-11 15:13:52,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:52,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:52,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:52,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:52,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:52,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:52,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:13:52,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362160660] [2020-11-11 15:13:52,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:52,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:52,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:52,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:52,678 INFO L87 Difference]: Start difference. First operand 2152 states and 5926 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:53,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:53,654 INFO L93 Difference]: Finished difference Result 3045 states and 7890 transitions. [2020-11-11 15:13:53,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:13:53,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2020-11-11 15:13:53,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:53,659 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:13:53,660 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:13:53,660 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=555, Invalid=1515, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:13:53,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:13:53,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2202. [2020-11-11 15:13:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.76056338028169) internal successors, (6076), 2201 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 6076 transitions. [2020-11-11 15:13:53,695 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 6076 transitions. Word has length 91 [2020-11-11 15:13:53,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:53,695 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 6076 transitions. [2020-11-11 15:13:53,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 6076 transitions. [2020-11-11 15:13:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:53,697 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:53,697 INFO L494 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] [2020-11-11 15:13:53,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:53,898 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:53,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:53,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1170420757, now seen corresponding path program 83 times [2020-11-11 15:13:53,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:53,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416873999] [2020-11-11 15:13:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:54,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416873999] [2020-11-11 15:13:54,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036443969] [2020-11-11 15:13:54,197 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 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 [2020-11-11 15:13:54,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:13:54,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:54,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:54,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:54,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:54,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:54,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:54,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:13:54,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980719020] [2020-11-11 15:13:54,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:54,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:54,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:54,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:54,383 INFO L87 Difference]: Start difference. First operand 2202 states and 6076 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:13:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:55,651 INFO L93 Difference]: Finished difference Result 3090 states and 8060 transitions. [2020-11-11 15:13:55,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:13:55,652 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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 91 [2020-11-11 15:13:55,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:55,656 INFO L225 Difference]: With dead ends: 3090 [2020-11-11 15:13:55,656 INFO L226 Difference]: Without dead ends: 2820 [2020-11-11 15:13:55,657 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=584, Invalid=1672, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:13:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2020-11-11 15:13:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2252. [2020-11-11 15:13:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 2.7725455353176365) internal successors, (6241), 2251 states have internal predecessors, (6241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 6241 transitions. [2020-11-11 15:13:55,693 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 6241 transitions. Word has length 91 [2020-11-11 15:13:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:55,693 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 6241 transitions. [2020-11-11 15:13:55,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:13:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 6241 transitions. [2020-11-11 15:13:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:55,695 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:55,695 INFO L494 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] [2020-11-11 15:13:55,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:55,896 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:55,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:55,897 INFO L82 PathProgramCache]: Analyzing trace with hash -541629255, now seen corresponding path program 84 times [2020-11-11 15:13:55,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:55,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921071119] [2020-11-11 15:13:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:56,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921071119] [2020-11-11 15:13:56,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258335945] [2020-11-11 15:13:56,161 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 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 [2020-11-11 15:13:56,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:13:56,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:56,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:56,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:56,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:56,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:56,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:13:56,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313241678] [2020-11-11 15:13:56,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:56,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:56,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:56,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:56,321 INFO L87 Difference]: Start difference. First operand 2252 states and 6241 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:57,350 INFO L93 Difference]: Finished difference Result 4152 states and 11144 transitions. [2020-11-11 15:13:57,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:13:57,351 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2020-11-11 15:13:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:57,356 INFO L225 Difference]: With dead ends: 4152 [2020-11-11 15:13:57,357 INFO L226 Difference]: Without dead ends: 3882 [2020-11-11 15:13:57,357 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=645, Invalid=1611, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:13:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2020-11-11 15:13:57,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 2377. [2020-11-11 15:13:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.791245791245791) internal successors, (6632), 2376 states have internal predecessors, (6632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 6632 transitions. [2020-11-11 15:13:57,400 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 6632 transitions. Word has length 91 [2020-11-11 15:13:57,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:57,400 INFO L481 AbstractCegarLoop]: Abstraction has 2377 states and 6632 transitions. [2020-11-11 15:13:57,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:57,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 6632 transitions. [2020-11-11 15:13:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:57,403 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:57,403 INFO L494 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] [2020-11-11 15:13:57,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:57,604 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:57,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:57,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1169578699, now seen corresponding path program 85 times [2020-11-11 15:13:57,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:57,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752894313] [2020-11-11 15:13:57,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:57,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752894313] [2020-11-11 15:13:57,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504692858] [2020-11-11 15:13:57,924 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 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 [2020-11-11 15:13:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:58,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:58,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:58,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:58,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:58,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:58,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:13:58,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907177619] [2020-11-11 15:13:58,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:58,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:58,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:58,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:58,089 INFO L87 Difference]: Start difference. First operand 2377 states and 6632 transitions. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:59,545 INFO L93 Difference]: Finished difference Result 3547 states and 9390 transitions. [2020-11-11 15:13:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:13:59,545 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 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 91 [2020-11-11 15:13:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:59,550 INFO L225 Difference]: With dead ends: 3547 [2020-11-11 15:13:59,550 INFO L226 Difference]: Without dead ends: 3020 [2020-11-11 15:13:59,551 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=714, Invalid=2042, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:13:59,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2020-11-11 15:13:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 2387. [2020-11-11 15:13:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 2.7812238055322718) internal successors, (6636), 2386 states have internal predecessors, (6636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 6636 transitions. [2020-11-11 15:13:59,590 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 6636 transitions. Word has length 91 [2020-11-11 15:13:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:59,590 INFO L481 AbstractCegarLoop]: Abstraction has 2387 states and 6636 transitions. [2020-11-11 15:13:59,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 6636 transitions. [2020-11-11 15:13:59,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:13:59,593 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:59,593 INFO L494 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] [2020-11-11 15:13:59,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:59,793 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:59,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:59,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1476649203, now seen corresponding path program 86 times [2020-11-11 15:13:59,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:59,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502935115] [2020-11-11 15:13:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:00,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502935115] [2020-11-11 15:14:00,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70461438] [2020-11-11 15:14:00,196 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 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 [2020-11-11 15:14:00,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:00,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:00,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:00,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:00,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:00,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:00,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:00,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:00,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625128740] [2020-11-11 15:14:00,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:00,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:00,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:00,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:00,384 INFO L87 Difference]: Start difference. First operand 2387 states and 6636 transitions. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:01,221 INFO L93 Difference]: Finished difference Result 3505 states and 9320 transitions. [2020-11-11 15:14:01,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:14:01,222 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:01,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:01,227 INFO L225 Difference]: With dead ends: 3505 [2020-11-11 15:14:01,227 INFO L226 Difference]: Without dead ends: 3171 [2020-11-11 15:14:01,228 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:14:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2020-11-11 15:14:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 2472. [2020-11-11 15:14:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.754350465398624) internal successors, (6806), 2471 states have internal predecessors, (6806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6806 transitions. [2020-11-11 15:14:01,265 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6806 transitions. Word has length 96 [2020-11-11 15:14:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:01,266 INFO L481 AbstractCegarLoop]: Abstraction has 2472 states and 6806 transitions. [2020-11-11 15:14:01,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6806 transitions. [2020-11-11 15:14:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:01,268 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:01,268 INFO L494 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] [2020-11-11 15:14:01,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-11-11 15:14:01,469 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:01,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1036481211, now seen corresponding path program 87 times [2020-11-11 15:14:01,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:01,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467609356] [2020-11-11 15:14:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:01,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467609356] [2020-11-11 15:14:01,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364396981] [2020-11-11 15:14:01,853 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 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 [2020-11-11 15:14:01,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:14:01,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:01,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:01,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:01,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:02,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:02,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:02,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506499546] [2020-11-11 15:14:02,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:02,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:02,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:02,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:02,008 INFO L87 Difference]: Start difference. First operand 2472 states and 6806 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:02,684 INFO L93 Difference]: Finished difference Result 3870 states and 9730 transitions. [2020-11-11 15:14:02,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:14:02,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:02,690 INFO L225 Difference]: With dead ends: 3870 [2020-11-11 15:14:02,690 INFO L226 Difference]: Without dead ends: 3600 [2020-11-11 15:14:02,691 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 15:14:02,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2020-11-11 15:14:02,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2487. [2020-11-11 15:14:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:02,733 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:02,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:02,733 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:02,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:02,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:02,736 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:02,736 INFO L494 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] [2020-11-11 15:14:02,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:02,937 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:02,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:02,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1672499115, now seen corresponding path program 88 times [2020-11-11 15:14:02,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:02,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602569782] [2020-11-11 15:14:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:03,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602569782] [2020-11-11 15:14:03,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021088501] [2020-11-11 15:14:03,341 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 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 [2020-11-11 15:14:03,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:03,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:03,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:14:03,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:03,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:03,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:03,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:03,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:03,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437152591] [2020-11-11 15:14:03,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:03,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:03,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:03,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:03,527 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:04,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:04,389 INFO L93 Difference]: Finished difference Result 3755 states and 9500 transitions. [2020-11-11 15:14:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:14:04,389 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:04,395 INFO L225 Difference]: With dead ends: 3755 [2020-11-11 15:14:04,395 INFO L226 Difference]: Without dead ends: 3485 [2020-11-11 15:14:04,395 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:14:04,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2020-11-11 15:14:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 2487. [2020-11-11 15:14:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:04,435 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:04,436 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:04,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:04,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:04,438 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:04,438 INFO L494 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] [2020-11-11 15:14:04,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-11-11 15:14:04,645 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:04,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:04,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1783027961, now seen corresponding path program 89 times [2020-11-11 15:14:04,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:04,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097977330] [2020-11-11 15:14:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:05,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097977330] [2020-11-11 15:14:05,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656975715] [2020-11-11 15:14:05,002 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 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 [2020-11-11 15:14:05,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:14:05,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:05,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:05,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:05,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:05,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:05,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:05,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070453515] [2020-11-11 15:14:05,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:05,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:05,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:05,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:05,126 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:05,860 INFO L93 Difference]: Finished difference Result 3730 states and 9450 transitions. [2020-11-11 15:14:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:14:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:05,866 INFO L225 Difference]: With dead ends: 3730 [2020-11-11 15:14:05,866 INFO L226 Difference]: Without dead ends: 3460 [2020-11-11 15:14:05,867 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 15:14:05,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2020-11-11 15:14:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 2487. [2020-11-11 15:14:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:05,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:05,908 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:05,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:05,908 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:05,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:05,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:05,911 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:05,911 INFO L494 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] [2020-11-11 15:14:06,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:06,112 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:06,112 INFO L82 PathProgramCache]: Analyzing trace with hash -448650775, now seen corresponding path program 90 times [2020-11-11 15:14:06,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:06,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660471517] [2020-11-11 15:14:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:06,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660471517] [2020-11-11 15:14:06,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516813024] [2020-11-11 15:14:06,520 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 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 [2020-11-11 15:14:06,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:14:06,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:06,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:06,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:06,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:06,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:06,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:06,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:06,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363425065] [2020-11-11 15:14:06,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:06,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:06,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:06,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:06,700 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:07,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:07,636 INFO L93 Difference]: Finished difference Result 3680 states and 9350 transitions. [2020-11-11 15:14:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:14:07,636 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:07,642 INFO L225 Difference]: With dead ends: 3680 [2020-11-11 15:14:07,642 INFO L226 Difference]: Without dead ends: 3410 [2020-11-11 15:14:07,642 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:14:07,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2020-11-11 15:14:07,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2487. [2020-11-11 15:14:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:07,683 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:07,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:07,683 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:07,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:07,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:07,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:07,686 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:07,686 INFO L494 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] [2020-11-11 15:14:07,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-11-11 15:14:07,901 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:07,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:07,901 INFO L82 PathProgramCache]: Analyzing trace with hash -886614857, now seen corresponding path program 91 times [2020-11-11 15:14:07,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:07,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17054096] [2020-11-11 15:14:07,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:08,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17054096] [2020-11-11 15:14:08,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166843682] [2020-11-11 15:14:08,255 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 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 [2020-11-11 15:14:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:08,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:08,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:08,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:08,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:08,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:08,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51569757] [2020-11-11 15:14:08,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:08,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:08,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:08,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:08,380 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:09,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:09,212 INFO L93 Difference]: Finished difference Result 3630 states and 9250 transitions. [2020-11-11 15:14:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:14:09,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:09,218 INFO L225 Difference]: With dead ends: 3630 [2020-11-11 15:14:09,218 INFO L226 Difference]: Without dead ends: 3360 [2020-11-11 15:14:09,219 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:14:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2020-11-11 15:14:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2487. [2020-11-11 15:14:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:09,257 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:09,257 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:09,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:09,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:09,260 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:09,260 INFO L494 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] [2020-11-11 15:14:09,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-11-11 15:14:09,462 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:09,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:09,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1863059879, now seen corresponding path program 92 times [2020-11-11 15:14:09,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:09,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393384342] [2020-11-11 15:14:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:09,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393384342] [2020-11-11 15:14:09,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244545072] [2020-11-11 15:14:09,858 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 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 [2020-11-11 15:14:09,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:09,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:09,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:09,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:09,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:10,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:10,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:10,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:10,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691662284] [2020-11-11 15:14:10,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:10,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:10,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:10,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:10,029 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:11,167 INFO L93 Difference]: Finished difference Result 3580 states and 9150 transitions. [2020-11-11 15:14:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:14:11,168 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:11,173 INFO L225 Difference]: With dead ends: 3580 [2020-11-11 15:14:11,173 INFO L226 Difference]: Without dead ends: 3310 [2020-11-11 15:14:11,173 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:14:11,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2020-11-11 15:14:11,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2487. [2020-11-11 15:14:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:11,212 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:11,212 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:11,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:11,214 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:11,215 INFO L494 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] [2020-11-11 15:14:11,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-11-11 15:14:11,415 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:11,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1295894005, now seen corresponding path program 93 times [2020-11-11 15:14:11,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:11,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284429211] [2020-11-11 15:14:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:11,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284429211] [2020-11-11 15:14:11,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177518108] [2020-11-11 15:14:11,767 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 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 [2020-11-11 15:14:11,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:14:11,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:11,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:14:11,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:11,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:11,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:11,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:11,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274556008] [2020-11-11 15:14:11,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:11,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:11,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:11,899 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:12,863 INFO L93 Difference]: Finished difference Result 3530 states and 9050 transitions. [2020-11-11 15:14:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:14:12,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:12,870 INFO L225 Difference]: With dead ends: 3530 [2020-11-11 15:14:12,870 INFO L226 Difference]: Without dead ends: 3260 [2020-11-11 15:14:12,871 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:14:12,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2020-11-11 15:14:12,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 2487. [2020-11-11 15:14:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:12,927 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:12,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:12,927 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:12,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:12,931 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:12,931 INFO L494 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] [2020-11-11 15:14:13,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:13,140 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:13,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2124605157, now seen corresponding path program 94 times [2020-11-11 15:14:13,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:13,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246767485] [2020-11-11 15:14:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:13,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246767485] [2020-11-11 15:14:13,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248357199] [2020-11-11 15:14:13,489 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 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 [2020-11-11 15:14:13,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:13,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:13,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:14:13,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:13,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:13,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:13,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:13,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:13,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381217056] [2020-11-11 15:14:13,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:13,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:13,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:13,649 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:14,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:14,925 INFO L93 Difference]: Finished difference Result 3480 states and 8950 transitions. [2020-11-11 15:14:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:14:14,926 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:14,931 INFO L225 Difference]: With dead ends: 3480 [2020-11-11 15:14:14,931 INFO L226 Difference]: Without dead ends: 3210 [2020-11-11 15:14:14,932 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:14:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2020-11-11 15:14:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 2487. [2020-11-11 15:14:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:14,972 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:14,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:14,972 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:14,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:14,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:14,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:14,975 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:14,976 INFO L494 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] [2020-11-11 15:14:15,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-11-11 15:14:15,191 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:15,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:15,191 INFO L82 PathProgramCache]: Analyzing trace with hash 402066611, now seen corresponding path program 95 times [2020-11-11 15:14:15,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:15,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717512423] [2020-11-11 15:14:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:15,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717512423] [2020-11-11 15:14:15,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982057767] [2020-11-11 15:14:15,510 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 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 [2020-11-11 15:14:15,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:14:15,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:15,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:15,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:15,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:15,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:15,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:15,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585344230] [2020-11-11 15:14:15,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:15,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:15,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:15,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:15,677 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:16,714 INFO L93 Difference]: Finished difference Result 3430 states and 8850 transitions. [2020-11-11 15:14:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:14:16,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:16,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:16,720 INFO L225 Difference]: With dead ends: 3430 [2020-11-11 15:14:16,720 INFO L226 Difference]: Without dead ends: 3160 [2020-11-11 15:14:16,721 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:14:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2020-11-11 15:14:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 2487. [2020-11-11 15:14:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:16,760 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:16,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:16,761 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:16,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:16,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:16,763 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:16,764 INFO L494 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] [2020-11-11 15:14:16,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:16,973 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:16,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:16,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1137469021, now seen corresponding path program 96 times [2020-11-11 15:14:16,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:16,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132550799] [2020-11-11 15:14:16,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:17,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132550799] [2020-11-11 15:14:17,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317238501] [2020-11-11 15:14:17,309 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 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 [2020-11-11 15:14:17,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:14:17,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:17,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:14:17,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:17,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:17,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:17,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:17,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211815293] [2020-11-11 15:14:17,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:17,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:17,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:17,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:17,479 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:18,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:18,784 INFO L93 Difference]: Finished difference Result 3380 states and 8750 transitions. [2020-11-11 15:14:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:14:18,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:18,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:18,790 INFO L225 Difference]: With dead ends: 3380 [2020-11-11 15:14:18,790 INFO L226 Difference]: Without dead ends: 3110 [2020-11-11 15:14:18,791 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:14:18,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2020-11-11 15:14:18,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2487. [2020-11-11 15:14:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:18,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:18,852 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:18,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:18,852 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:18,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:18,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:18,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:18,855 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:18,855 INFO L494 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] [2020-11-11 15:14:19,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-11-11 15:14:19,056 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:19,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1800931569, now seen corresponding path program 97 times [2020-11-11 15:14:19,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:19,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316096881] [2020-11-11 15:14:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:19,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316096881] [2020-11-11 15:14:19,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746483132] [2020-11-11 15:14:19,371 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 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 [2020-11-11 15:14:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:19,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:19,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:19,483 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:19,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:19,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:19,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520315689] [2020-11-11 15:14:19,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:19,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:19,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:19,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:19,495 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:20,628 INFO L93 Difference]: Finished difference Result 3330 states and 8650 transitions. [2020-11-11 15:14:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:14:20,629 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:20,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:20,634 INFO L225 Difference]: With dead ends: 3330 [2020-11-11 15:14:20,634 INFO L226 Difference]: Without dead ends: 3060 [2020-11-11 15:14:20,635 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:14:20,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2020-11-11 15:14:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 2487. [2020-11-11 15:14:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:20,670 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:20,671 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:20,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:20,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:20,673 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:20,673 INFO L494 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] [2020-11-11 15:14:20,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:20,880 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:20,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:20,880 INFO L82 PathProgramCache]: Analyzing trace with hash -662502943, now seen corresponding path program 98 times [2020-11-11 15:14:20,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:20,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146448283] [2020-11-11 15:14:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:21,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146448283] [2020-11-11 15:14:21,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191215089] [2020-11-11 15:14:21,171 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 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 [2020-11-11 15:14:21,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:21,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:21,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:21,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:21,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:21,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:21,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:21,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:21,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794648259] [2020-11-11 15:14:21,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:21,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:21,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:21,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:21,332 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:22,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:22,665 INFO L93 Difference]: Finished difference Result 3325 states and 8660 transitions. [2020-11-11 15:14:22,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:14:22,665 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:22,670 INFO L225 Difference]: With dead ends: 3325 [2020-11-11 15:14:22,670 INFO L226 Difference]: Without dead ends: 3055 [2020-11-11 15:14:22,671 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:14:22,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2020-11-11 15:14:22,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 2487. [2020-11-11 15:14:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.751810136765889) internal successors, (6841), 2486 states have internal predecessors, (6841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6841 transitions. [2020-11-11 15:14:22,705 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6841 transitions. Word has length 96 [2020-11-11 15:14:22,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:22,705 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6841 transitions. [2020-11-11 15:14:22,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:22,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6841 transitions. [2020-11-11 15:14:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:22,707 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:22,707 INFO L494 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] [2020-11-11 15:14:22,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:22,908 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:22,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:22,909 INFO L82 PathProgramCache]: Analyzing trace with hash -33711441, now seen corresponding path program 99 times [2020-11-11 15:14:22,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:22,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975806754] [2020-11-11 15:14:22,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:23,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975806754] [2020-11-11 15:14:23,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497358117] [2020-11-11 15:14:23,200 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 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 [2020-11-11 15:14:23,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:14:23,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:23,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:23,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:23,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:23,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:23,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:23,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674670086] [2020-11-11 15:14:23,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:23,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:23,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:23,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:23,328 INFO L87 Difference]: Start difference. First operand 2487 states and 6841 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:24,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:24,609 INFO L93 Difference]: Finished difference Result 4412 states and 11794 transitions. [2020-11-11 15:14:24,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:14:24,611 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:24,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:24,618 INFO L225 Difference]: With dead ends: 4412 [2020-11-11 15:14:24,618 INFO L226 Difference]: Without dead ends: 4142 [2020-11-11 15:14:24,619 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:14:24,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2020-11-11 15:14:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 2612. [2020-11-11 15:14:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2612 states, 2611 states have (on average 2.7698199923400995) internal successors, (7232), 2611 states have internal predecessors, (7232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2612 states to 2612 states and 7232 transitions. [2020-11-11 15:14:24,665 INFO L78 Accepts]: Start accepts. Automaton has 2612 states and 7232 transitions. Word has length 96 [2020-11-11 15:14:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:24,666 INFO L481 AbstractCegarLoop]: Abstraction has 2612 states and 7232 transitions. [2020-11-11 15:14:24,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2612 states and 7232 transitions. [2020-11-11 15:14:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:24,668 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:24,668 INFO L494 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] [2020-11-11 15:14:24,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-11-11 15:14:24,869 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1677496513, now seen corresponding path program 100 times [2020-11-11 15:14:24,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:24,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588550418] [2020-11-11 15:14:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:25,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588550418] [2020-11-11 15:14:25,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619373824] [2020-11-11 15:14:25,245 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 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 [2020-11-11 15:14:25,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:25,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:25,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:14:25,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:25,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:25,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:25,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:25,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:25,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234291791] [2020-11-11 15:14:25,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:25,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:25,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:25,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:25,409 INFO L87 Difference]: Start difference. First operand 2612 states and 7232 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:27,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:27,051 INFO L93 Difference]: Finished difference Result 3451 states and 9150 transitions. [2020-11-11 15:14:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:14:27,052 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:14:27,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:27,057 INFO L225 Difference]: With dead ends: 3451 [2020-11-11 15:14:27,058 INFO L226 Difference]: Without dead ends: 2980 [2020-11-11 15:14:27,058 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:14:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2020-11-11 15:14:27,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 1902. [2020-11-11 15:14:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.6964755391899002) internal successors, (5126), 1901 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5126 transitions. [2020-11-11 15:14:27,092 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5126 transitions. Word has length 96 [2020-11-11 15:14:27,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:27,092 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 5126 transitions. [2020-11-11 15:14:27,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:27,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5126 transitions. [2020-11-11 15:14:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:27,093 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:27,093 INFO L494 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] [2020-11-11 15:14:27,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-11-11 15:14:27,294 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:27,295 INFO L82 PathProgramCache]: Analyzing trace with hash 756357588, now seen corresponding path program 101 times [2020-11-11 15:14:27,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:27,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839265445] [2020-11-11 15:14:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:27,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839265445] [2020-11-11 15:14:27,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855621222] [2020-11-11 15:14:27,776 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 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 [2020-11-11 15:14:27,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:14:27,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:27,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:27,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:27,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:27,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:27,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:27,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817498524] [2020-11-11 15:14:27,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:27,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:27,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:27,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:27,947 INFO L87 Difference]: Start difference. First operand 1902 states and 5126 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:28,869 INFO L93 Difference]: Finished difference Result 2995 states and 7490 transitions. [2020-11-11 15:14:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:14:28,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:28,874 INFO L225 Difference]: With dead ends: 2995 [2020-11-11 15:14:28,875 INFO L226 Difference]: Without dead ends: 2725 [2020-11-11 15:14:28,875 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:14:28,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2020-11-11 15:14:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1952. [2020-11-11 15:14:28,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 2.7042542286007176) internal successors, (5276), 1951 states have internal predecessors, (5276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 5276 transitions. [2020-11-11 15:14:28,907 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 5276 transitions. Word has length 101 [2020-11-11 15:14:28,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:28,907 INFO L481 AbstractCegarLoop]: Abstraction has 1952 states and 5276 transitions. [2020-11-11 15:14:28,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 5276 transitions. [2020-11-11 15:14:28,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:28,909 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:28,909 INFO L494 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] [2020-11-11 15:14:29,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:29,110 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:29,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:29,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1392375492, now seen corresponding path program 102 times [2020-11-11 15:14:29,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:29,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263665391] [2020-11-11 15:14:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:29,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263665391] [2020-11-11 15:14:29,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616338340] [2020-11-11 15:14:29,639 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 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 [2020-11-11 15:14:29,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:14:29,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:29,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:29,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:29,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:29,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:29,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:29,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:29,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010976810] [2020-11-11 15:14:29,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:29,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:29,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:29,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:29,866 INFO L87 Difference]: Start difference. First operand 1952 states and 5276 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:30,774 INFO L93 Difference]: Finished difference Result 3340 states and 8230 transitions. [2020-11-11 15:14:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:14:30,775 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:30,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:30,781 INFO L225 Difference]: With dead ends: 3340 [2020-11-11 15:14:30,781 INFO L226 Difference]: Without dead ends: 3070 [2020-11-11 15:14:30,781 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:14:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2020-11-11 15:14:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2002. [2020-11-11 15:14:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 2.7116441779110443) internal successors, (5426), 2001 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) [2020-11-11 15:14:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 5426 transitions. [2020-11-11 15:14:30,817 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 5426 transitions. Word has length 101 [2020-11-11 15:14:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:30,818 INFO L481 AbstractCegarLoop]: Abstraction has 2002 states and 5426 transitions. [2020-11-11 15:14:30,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 5426 transitions. [2020-11-11 15:14:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:30,820 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:30,820 INFO L494 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] [2020-11-11 15:14:31,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-11-11 15:14:31,021 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:31,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1502904338, now seen corresponding path program 103 times [2020-11-11 15:14:31,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:31,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277820888] [2020-11-11 15:14:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:31,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277820888] [2020-11-11 15:14:31,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94672269] [2020-11-11 15:14:31,482 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 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 [2020-11-11 15:14:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:31,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:31,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:31,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:31,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:31,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:31,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599307986] [2020-11-11 15:14:31,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:31,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:31,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:31,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:31,670 INFO L87 Difference]: Start difference. First operand 2002 states and 5426 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:32,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:32,682 INFO L93 Difference]: Finished difference Result 3345 states and 8290 transitions. [2020-11-11 15:14:32,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:14:32,683 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:32,687 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:32,687 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:32,688 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:14:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:32,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2052. [2020-11-11 15:14:32,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 2.7186738176499268) internal successors, (5576), 2051 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:32,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5576 transitions. [2020-11-11 15:14:32,736 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5576 transitions. Word has length 101 [2020-11-11 15:14:32,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:32,736 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5576 transitions. [2020-11-11 15:14:32,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5576 transitions. [2020-11-11 15:14:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:32,738 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:32,738 INFO L494 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] [2020-11-11 15:14:32,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-11-11 15:14:32,939 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:32,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:32,940 INFO L82 PathProgramCache]: Analyzing trace with hash -728774398, now seen corresponding path program 104 times [2020-11-11 15:14:32,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:32,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728693520] [2020-11-11 15:14:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:33,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728693520] [2020-11-11 15:14:33,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400709334] [2020-11-11 15:14:33,430 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 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 [2020-11-11 15:14:33,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:33,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:33,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:33,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:33,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:33,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:33,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:33,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:33,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760706473] [2020-11-11 15:14:33,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:33,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:33,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:33,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:33,653 INFO L87 Difference]: Start difference. First operand 2052 states and 5576 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:34,860 INFO L93 Difference]: Finished difference Result 3345 states and 8340 transitions. [2020-11-11 15:14:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:14:34,860 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:34,865 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:34,865 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:34,866 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:14:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2102. [2020-11-11 15:14:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2101 states have (on average 2.7253688719657307) internal successors, (5726), 2101 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 5726 transitions. [2020-11-11 15:14:34,899 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 5726 transitions. Word has length 101 [2020-11-11 15:14:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:34,899 INFO L481 AbstractCegarLoop]: Abstraction has 2102 states and 5726 transitions. [2020-11-11 15:14:34,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:34,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 5726 transitions. [2020-11-11 15:14:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:34,902 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:34,902 INFO L494 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] [2020-11-11 15:14:35,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-11-11 15:14:35,123 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:35,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:35,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1166738480, now seen corresponding path program 105 times [2020-11-11 15:14:35,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:35,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480720410] [2020-11-11 15:14:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:35,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480720410] [2020-11-11 15:14:35,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527272344] [2020-11-11 15:14:35,482 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 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 [2020-11-11 15:14:35,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:14:35,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:35,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:14:35,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:35,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:35,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:35,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:35,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553873434] [2020-11-11 15:14:35,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:35,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:35,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:35,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:35,669 INFO L87 Difference]: Start difference. First operand 2102 states and 5726 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:36,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:36,803 INFO L93 Difference]: Finished difference Result 3345 states and 8390 transitions. [2020-11-11 15:14:36,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:14:36,805 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:36,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:36,809 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:36,810 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:36,810 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:14:36,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2152. [2020-11-11 15:14:36,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 2.7317526731752673) internal successors, (5876), 2151 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 5876 transitions. [2020-11-11 15:14:36,847 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 5876 transitions. Word has length 101 [2020-11-11 15:14:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:36,848 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 5876 transitions. [2020-11-11 15:14:36,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 5876 transitions. [2020-11-11 15:14:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:36,850 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:36,850 INFO L494 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] [2020-11-11 15:14:37,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:37,051 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:37,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:37,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1582936256, now seen corresponding path program 106 times [2020-11-11 15:14:37,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:37,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925060329] [2020-11-11 15:14:37,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:37,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925060329] [2020-11-11 15:14:37,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555310513] [2020-11-11 15:14:37,513 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 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 [2020-11-11 15:14:37,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:37,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:37,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:37,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:37,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:37,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:37,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:37,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141959855] [2020-11-11 15:14:37,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:37,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:37,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:37,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:37,725 INFO L87 Difference]: Start difference. First operand 2152 states and 5876 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:39,135 INFO L93 Difference]: Finished difference Result 3345 states and 8440 transitions. [2020-11-11 15:14:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:14:39,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:39,141 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:39,141 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:39,141 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:14:39,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:39,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2202. [2020-11-11 15:14:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.737846433439346) internal successors, (6026), 2201 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:39,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 6026 transitions. [2020-11-11 15:14:39,179 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 6026 transitions. Word has length 101 [2020-11-11 15:14:39,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:39,179 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 6026 transitions. [2020-11-11 15:14:39,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 6026 transitions. [2020-11-11 15:14:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:39,181 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:39,182 INFO L494 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] [2020-11-11 15:14:39,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-11-11 15:14:39,383 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:39,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:39,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1015770382, now seen corresponding path program 107 times [2020-11-11 15:14:39,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:39,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339884218] [2020-11-11 15:14:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:39,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339884218] [2020-11-11 15:14:39,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017434364] [2020-11-11 15:14:39,752 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 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 [2020-11-11 15:14:39,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:14:39,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:39,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:39,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:39,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:39,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:39,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:39,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849610789] [2020-11-11 15:14:39,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:39,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:39,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:39,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:39,927 INFO L87 Difference]: Start difference. First operand 2202 states and 6026 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:41,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:41,172 INFO L93 Difference]: Finished difference Result 3345 states and 8490 transitions. [2020-11-11 15:14:41,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:14:41,173 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:41,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:41,178 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:41,178 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:41,178 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:14:41,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:41,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2252. [2020-11-11 15:14:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 2.7436694802310084) internal successors, (6176), 2251 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 6176 transitions. [2020-11-11 15:14:41,218 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 6176 transitions. Word has length 101 [2020-11-11 15:14:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:41,218 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 6176 transitions. [2020-11-11 15:14:41,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 6176 transitions. [2020-11-11 15:14:41,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:41,222 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:41,222 INFO L494 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] [2020-11-11 15:14:41,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-11-11 15:14:41,430 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:41,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:41,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1844481534, now seen corresponding path program 108 times [2020-11-11 15:14:41,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:41,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101029633] [2020-11-11 15:14:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:41,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101029633] [2020-11-11 15:14:41,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085023998] [2020-11-11 15:14:41,925 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 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 [2020-11-11 15:14:42,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:14:42,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:42,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:42,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:42,070 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:42,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:42,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:42,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:42,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017851197] [2020-11-11 15:14:42,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:42,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:42,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:42,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:42,148 INFO L87 Difference]: Start difference. First operand 2252 states and 6176 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:43,697 INFO L93 Difference]: Finished difference Result 3345 states and 8540 transitions. [2020-11-11 15:14:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:14:43,699 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:43,704 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:43,704 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:43,704 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:14:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2302. [2020-11-11 15:14:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 2.7492394611038677) internal successors, (6326), 2301 states have internal predecessors, (6326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 6326 transitions. [2020-11-11 15:14:43,745 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 6326 transitions. Word has length 101 [2020-11-11 15:14:43,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:43,745 INFO L481 AbstractCegarLoop]: Abstraction has 2302 states and 6326 transitions. [2020-11-11 15:14:43,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:43,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 6326 transitions. [2020-11-11 15:14:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:43,749 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:43,749 INFO L494 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] [2020-11-11 15:14:43,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:43,949 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:43,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:43,950 INFO L82 PathProgramCache]: Analyzing trace with hash 121942988, now seen corresponding path program 109 times [2020-11-11 15:14:43,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:43,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566072018] [2020-11-11 15:14:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:44,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566072018] [2020-11-11 15:14:44,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884698714] [2020-11-11 15:14:44,358 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 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 [2020-11-11 15:14:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:44,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:44,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:44,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:44,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:44,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:44,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127499690] [2020-11-11 15:14:44,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:44,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:44,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:44,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:44,542 INFO L87 Difference]: Start difference. First operand 2302 states and 6326 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:45,897 INFO L93 Difference]: Finished difference Result 3345 states and 8590 transitions. [2020-11-11 15:14:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:14:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:45,902 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:45,902 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:45,903 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:14:45,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:45,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2352. [2020-11-11 15:14:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.754572522330923) internal successors, (6476), 2351 states have internal predecessors, (6476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6476 transitions. [2020-11-11 15:14:45,944 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6476 transitions. Word has length 101 [2020-11-11 15:14:45,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:45,944 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 6476 transitions. [2020-11-11 15:14:45,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6476 transitions. [2020-11-11 15:14:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:45,947 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:45,947 INFO L494 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] [2020-11-11 15:14:46,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:46,148 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:46,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:46,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1417592644, now seen corresponding path program 110 times [2020-11-11 15:14:46,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:46,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421266252] [2020-11-11 15:14:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:46,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421266252] [2020-11-11 15:14:46,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066271676] [2020-11-11 15:14:46,572 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 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 [2020-11-11 15:14:46,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:46,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:46,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:46,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:46,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:46,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:46,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:46,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:46,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172761917] [2020-11-11 15:14:46,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:46,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:46,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:46,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:46,790 INFO L87 Difference]: Start difference. First operand 2352 states and 6476 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:48,477 INFO L93 Difference]: Finished difference Result 3345 states and 8640 transitions. [2020-11-11 15:14:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:14:48,478 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:48,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:48,483 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:48,483 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:48,484 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:14:48,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2402. [2020-11-11 15:14:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.7596834652228237) internal successors, (6626), 2401 states have internal predecessors, (6626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6626 transitions. [2020-11-11 15:14:48,526 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6626 transitions. Word has length 101 [2020-11-11 15:14:48,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:48,527 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 6626 transitions. [2020-11-11 15:14:48,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:48,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6626 transitions. [2020-11-11 15:14:48,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:48,529 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:48,529 INFO L494 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] [2020-11-11 15:14:48,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:48,730 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:48,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1520807946, now seen corresponding path program 111 times [2020-11-11 15:14:48,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:48,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370603690] [2020-11-11 15:14:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:49,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370603690] [2020-11-11 15:14:49,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19959434] [2020-11-11 15:14:49,162 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 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 [2020-11-11 15:14:49,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:14:49,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:49,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:49,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:49,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:49,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:49,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:49,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209886077] [2020-11-11 15:14:49,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:49,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:49,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:49,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:49,340 INFO L87 Difference]: Start difference. First operand 2402 states and 6626 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:50,748 INFO L93 Difference]: Finished difference Result 3345 states and 8690 transitions. [2020-11-11 15:14:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:14:50,750 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:50,755 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:50,755 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:50,756 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:14:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2452. [2020-11-11 15:14:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 2.7645858833129333) internal successors, (6776), 2451 states have internal predecessors, (6776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 6776 transitions. [2020-11-11 15:14:50,800 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 6776 transitions. Word has length 101 [2020-11-11 15:14:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:50,800 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 6776 transitions. [2020-11-11 15:14:50,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 6776 transitions. [2020-11-11 15:14:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:50,803 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:50,803 INFO L494 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] [2020-11-11 15:14:51,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:51,004 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:51,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:51,004 INFO L82 PathProgramCache]: Analyzing trace with hash -942626566, now seen corresponding path program 112 times [2020-11-11 15:14:51,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:51,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527231247] [2020-11-11 15:14:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:51,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527231247] [2020-11-11 15:14:51,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303339146] [2020-11-11 15:14:51,420 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 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 [2020-11-11 15:14:51,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:51,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:51,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:51,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:51,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:51,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:51,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:51,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:51,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549819795] [2020-11-11 15:14:51,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:51,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:51,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:51,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:51,630 INFO L87 Difference]: Start difference. First operand 2452 states and 6776 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:53,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:53,239 INFO L93 Difference]: Finished difference Result 3390 states and 8860 transitions. [2020-11-11 15:14:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:14:53,240 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:53,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:53,244 INFO L225 Difference]: With dead ends: 3390 [2020-11-11 15:14:53,245 INFO L226 Difference]: Without dead ends: 3120 [2020-11-11 15:14:53,245 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:14:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2020-11-11 15:14:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2502. [2020-11-11 15:14:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.7752898840463813) internal successors, (6941), 2501 states have internal predecessors, (6941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6941 transitions. [2020-11-11 15:14:53,282 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6941 transitions. Word has length 101 [2020-11-11 15:14:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:53,282 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6941 transitions. [2020-11-11 15:14:53,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6941 transitions. [2020-11-11 15:14:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:53,284 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:53,284 INFO L494 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] [2020-11-11 15:14:53,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-11-11 15:14:53,485 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:53,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:53,486 INFO L82 PathProgramCache]: Analyzing trace with hash -313835064, now seen corresponding path program 113 times [2020-11-11 15:14:53,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:53,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698990611] [2020-11-11 15:14:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:53,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698990611] [2020-11-11 15:14:53,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065748001] [2020-11-11 15:14:53,890 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 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 [2020-11-11 15:14:53,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:14:53,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:53,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:53,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:54,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:54,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:54,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:54,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268887221] [2020-11-11 15:14:54,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:54,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:54,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:54,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:54,066 INFO L87 Difference]: Start difference. First operand 2502 states and 6941 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:55,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:55,609 INFO L93 Difference]: Finished difference Result 4452 states and 11944 transitions. [2020-11-11 15:14:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:14:55,610 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:55,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:55,617 INFO L225 Difference]: With dead ends: 4452 [2020-11-11 15:14:55,617 INFO L226 Difference]: Without dead ends: 4182 [2020-11-11 15:14:55,618 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:14:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2020-11-11 15:14:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 2627. [2020-11-11 15:14:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.792079207920792) internal successors, (7332), 2626 states have internal predecessors, (7332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 7332 transitions. [2020-11-11 15:14:55,668 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 7332 transitions. Word has length 101 [2020-11-11 15:14:55,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:55,668 INFO L481 AbstractCegarLoop]: Abstraction has 2627 states and 7332 transitions. [2020-11-11 15:14:55,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:55,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 7332 transitions. [2020-11-11 15:14:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:55,671 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:55,671 INFO L494 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] [2020-11-11 15:14:55,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-11-11 15:14:55,873 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:55,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:55,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1397372890, now seen corresponding path program 114 times [2020-11-11 15:14:55,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:55,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127998994] [2020-11-11 15:14:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:56,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127998994] [2020-11-11 15:14:56,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990579685] [2020-11-11 15:14:56,312 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 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 [2020-11-11 15:14:56,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:14:56,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:56,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:14:56,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:56,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:56,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:56,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:56,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589302697] [2020-11-11 15:14:56,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:56,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:56,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:56,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:56,507 INFO L87 Difference]: Start difference. First operand 2627 states and 7332 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:58,374 INFO L93 Difference]: Finished difference Result 3466 states and 9250 transitions. [2020-11-11 15:14:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:14:58,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:14:58,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:58,379 INFO L225 Difference]: With dead ends: 3466 [2020-11-11 15:14:58,380 INFO L226 Difference]: Without dead ends: 3055 [2020-11-11 15:14:58,380 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=770, Invalid=2200, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:14:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2020-11-11 15:14:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 1841. [2020-11-11 15:14:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 2.7) internal successors, (4968), 1840 states have internal predecessors, (4968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 4968 transitions. [2020-11-11 15:14:58,416 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 4968 transitions. Word has length 101 [2020-11-11 15:14:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:58,416 INFO L481 AbstractCegarLoop]: Abstraction has 1841 states and 4968 transitions. [2020-11-11 15:14:58,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:58,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 4968 transitions. [2020-11-11 15:14:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:14:58,418 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:58,418 INFO L494 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] [2020-11-11 15:14:58,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-11-11 15:14:58,632 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:58,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1563127458, now seen corresponding path program 115 times [2020-11-11 15:14:58,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:58,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70349130] [2020-11-11 15:14:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:59,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70349130] [2020-11-11 15:14:59,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355498408] [2020-11-11 15:14:59,223 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 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 [2020-11-11 15:14:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:59,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:59,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:59,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:59,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:59,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:59,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2020-11-11 15:14:59,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383824568] [2020-11-11 15:14:59,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:14:59,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:59,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:14:59,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:14:59,489 INFO L87 Difference]: Start difference. First operand 1841 states and 4968 transitions. Second operand has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:00,683 INFO L93 Difference]: Finished difference Result 3009 states and 7752 transitions. [2020-11-11 15:15:00,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:15:00,685 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 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 106 [2020-11-11 15:15:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:00,689 INFO L225 Difference]: With dead ends: 3009 [2020-11-11 15:15:00,689 INFO L226 Difference]: Without dead ends: 2675 [2020-11-11 15:15:00,690 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:15:00,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2020-11-11 15:15:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 1926. [2020-11-11 15:15:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 2.669090909090909) internal successors, (5138), 1925 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 5138 transitions. [2020-11-11 15:15:00,723 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 5138 transitions. Word has length 106 [2020-11-11 15:15:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:00,723 INFO L481 AbstractCegarLoop]: Abstraction has 1926 states and 5138 transitions. [2020-11-11 15:15:00,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:00,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 5138 transitions. [2020-11-11 15:15:00,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:00,726 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:00,727 INFO L494 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] [2020-11-11 15:15:00,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:00,930 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash 272999308, now seen corresponding path program 116 times [2020-11-11 15:15:00,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:00,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903581889] [2020-11-11 15:15:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:01,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903581889] [2020-11-11 15:15:01,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507485662] [2020-11-11 15:15:01,507 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 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 [2020-11-11 15:15:01,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:01,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:01,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:01,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:01,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:01,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:01,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:01,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855740108] [2020-11-11 15:15:01,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:01,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:01,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:01,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:01,663 INFO L87 Difference]: Start difference. First operand 1926 states and 5138 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) [2020-11-11 15:15:02,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:02,547 INFO L93 Difference]: Finished difference Result 3560 states and 8620 transitions. [2020-11-11 15:15:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:15:02,548 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 106 [2020-11-11 15:15:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:02,554 INFO L225 Difference]: With dead ends: 3560 [2020-11-11 15:15:02,554 INFO L226 Difference]: Without dead ends: 3290 [2020-11-11 15:15:02,554 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:15:02,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2020-11-11 15:15:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2027. [2020-11-11 15:15:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 2.678183613030602) internal successors, (5426), 2026 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) [2020-11-11 15:15:02,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 5426 transitions. [2020-11-11 15:15:02,596 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 5426 transitions. Word has length 106 [2020-11-11 15:15:02,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:02,597 INFO L481 AbstractCegarLoop]: Abstraction has 2027 states and 5426 transitions. [2020-11-11 15:15:02,597 INFO L482 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) [2020-11-11 15:15:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 5426 transitions. [2020-11-11 15:15:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:02,599 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:02,600 INFO L494 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] [2020-11-11 15:15:02,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-11-11 15:15:02,808 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:02,809 INFO L82 PathProgramCache]: Analyzing trace with hash 338891900, now seen corresponding path program 117 times [2020-11-11 15:15:02,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:02,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859218605] [2020-11-11 15:15:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:03,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859218605] [2020-11-11 15:15:03,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657108696] [2020-11-11 15:15:03,435 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 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 [2020-11-11 15:15:03,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:15:03,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:03,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:03,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:03,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:03,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:03,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:03,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:03,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905797014] [2020-11-11 15:15:03,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:03,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:03,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:03,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:03,674 INFO L87 Difference]: Start difference. First operand 2027 states and 5426 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:04,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:04,844 INFO L93 Difference]: Finished difference Result 3495 states and 8540 transitions. [2020-11-11 15:15:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:15:04,845 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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 106 [2020-11-11 15:15:04,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:04,850 INFO L225 Difference]: With dead ends: 3495 [2020-11-11 15:15:04,850 INFO L226 Difference]: Without dead ends: 3225 [2020-11-11 15:15:04,851 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 15:15:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2020-11-11 15:15:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2077. [2020-11-11 15:15:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 2076 states have (on average 2.6859344894026975) internal successors, (5576), 2076 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 5576 transitions. [2020-11-11 15:15:04,889 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 5576 transitions. Word has length 106 [2020-11-11 15:15:04,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:04,890 INFO L481 AbstractCegarLoop]: Abstraction has 2077 states and 5576 transitions. [2020-11-11 15:15:04,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 5576 transitions. [2020-11-11 15:15:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:04,892 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:04,893 INFO L494 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] [2020-11-11 15:15:05,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:05,094 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:05,094 INFO L82 PathProgramCache]: Analyzing trace with hash 413193290, now seen corresponding path program 118 times [2020-11-11 15:15:05,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:05,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376531068] [2020-11-11 15:15:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:05,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376531068] [2020-11-11 15:15:05,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532739323] [2020-11-11 15:15:05,642 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 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 [2020-11-11 15:15:05,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:05,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:05,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:05,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:05,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:05,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:05,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:05,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231803423] [2020-11-11 15:15:05,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:05,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:05,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:05,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:05,840 INFO L87 Difference]: Start difference. First operand 2077 states and 5576 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) [2020-11-11 15:15:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:06,679 INFO L93 Difference]: Finished difference Result 3520 states and 8640 transitions. [2020-11-11 15:15:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:15:06,680 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 106 [2020-11-11 15:15:06,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:06,684 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:15:06,684 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:15:06,684 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 15:15:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:15:06,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2127. [2020-11-11 15:15:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2126 states have (on average 2.6933207902163687) internal successors, (5726), 2126 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 5726 transitions. [2020-11-11 15:15:06,715 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 5726 transitions. Word has length 106 [2020-11-11 15:15:06,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:06,715 INFO L481 AbstractCegarLoop]: Abstraction has 2127 states and 5726 transitions. [2020-11-11 15:15:06,715 INFO L482 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) [2020-11-11 15:15:06,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 5726 transitions. [2020-11-11 15:15:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:06,717 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:06,717 INFO L494 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] [2020-11-11 15:15:06,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-11-11 15:15:06,918 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:06,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:06,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1049211194, now seen corresponding path program 119 times [2020-11-11 15:15:06,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:06,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819386122] [2020-11-11 15:15:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:07,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819386122] [2020-11-11 15:15:07,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17660570] [2020-11-11 15:15:07,490 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 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 [2020-11-11 15:15:07,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:15:07,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:07,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:07,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:07,641 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:07,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:07,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:07,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:07,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532075464] [2020-11-11 15:15:07,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:07,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:07,733 INFO L87 Difference]: Start difference. First operand 2127 states and 5726 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:09,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:09,083 INFO L93 Difference]: Finished difference Result 3520 states and 8690 transitions. [2020-11-11 15:15:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:15:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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 106 [2020-11-11 15:15:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:09,089 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:15:09,089 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:15:09,090 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:15:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:15:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2177. [2020-11-11 15:15:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 2.7003676470588234) internal successors, (5876), 2176 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 5876 transitions. [2020-11-11 15:15:09,131 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 5876 transitions. Word has length 106 [2020-11-11 15:15:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:09,131 INFO L481 AbstractCegarLoop]: Abstraction has 2177 states and 5876 transitions. [2020-11-11 15:15:09,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 5876 transitions. [2020-11-11 15:15:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:09,133 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:09,133 INFO L494 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] [2020-11-11 15:15:09,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:09,334 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:09,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1159740040, now seen corresponding path program 120 times [2020-11-11 15:15:09,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:09,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047370488] [2020-11-11 15:15:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:09,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047370488] [2020-11-11 15:15:09,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024245205] [2020-11-11 15:15:09,893 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 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 [2020-11-11 15:15:10,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:15:10,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:10,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:10,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:10,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:10,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:10,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:10,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403182030] [2020-11-11 15:15:10,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:10,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:10,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:10,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:10,097 INFO L87 Difference]: Start difference. First operand 2177 states and 5876 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) [2020-11-11 15:15:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:11,215 INFO L93 Difference]: Finished difference Result 3520 states and 8740 transitions. [2020-11-11 15:15:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:15:11,216 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 106 [2020-11-11 15:15:11,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:11,222 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:15:11,222 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:15:11,222 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 15:15:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:15:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2227. [2020-11-11 15:15:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 2.707097933513028) internal successors, (6026), 2226 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 6026 transitions. [2020-11-11 15:15:11,262 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 6026 transitions. Word has length 106 [2020-11-11 15:15:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:11,263 INFO L481 AbstractCegarLoop]: Abstraction has 2227 states and 6026 transitions. [2020-11-11 15:15:11,263 INFO L482 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) [2020-11-11 15:15:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 6026 transitions. [2020-11-11 15:15:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:11,265 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:11,265 INFO L494 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] [2020-11-11 15:15:11,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-11-11 15:15:11,474 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:11,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1071938696, now seen corresponding path program 121 times [2020-11-11 15:15:11,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:11,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956846872] [2020-11-11 15:15:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:12,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956846872] [2020-11-11 15:15:12,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754467044] [2020-11-11 15:15:12,032 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 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 [2020-11-11 15:15:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:12,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:12,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:12,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:12,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:12,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:12,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:12,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820086094] [2020-11-11 15:15:12,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:12,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:12,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:12,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:12,263 INFO L87 Difference]: Start difference. First operand 2227 states and 6026 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:13,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:13,765 INFO L93 Difference]: Finished difference Result 3520 states and 8790 transitions. [2020-11-11 15:15:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:15:13,767 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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 106 [2020-11-11 15:15:13,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:13,772 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:15:13,772 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:15:13,773 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:15:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:15:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2277. [2020-11-11 15:15:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2276 states have (on average 2.7135325131810193) internal successors, (6176), 2276 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:13,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 6176 transitions. [2020-11-11 15:15:13,813 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 6176 transitions. Word has length 106 [2020-11-11 15:15:13,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:13,813 INFO L481 AbstractCegarLoop]: Abstraction has 2277 states and 6176 transitions. [2020-11-11 15:15:13,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:13,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 6176 transitions. [2020-11-11 15:15:13,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:13,816 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:13,816 INFO L494 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] [2020-11-11 15:15:14,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:14,017 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:14,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1509902778, now seen corresponding path program 122 times [2020-11-11 15:15:14,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:14,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039517662] [2020-11-11 15:15:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:14,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039517662] [2020-11-11 15:15:14,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734676663] [2020-11-11 15:15:14,525 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 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 [2020-11-11 15:15:14,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:14,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:14,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:14,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:14,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:14,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:14,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:14,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007794573] [2020-11-11 15:15:14,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:14,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:14,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:14,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:14,707 INFO L87 Difference]: Start difference. First operand 2277 states and 6176 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) [2020-11-11 15:15:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:15,883 INFO L93 Difference]: Finished difference Result 3520 states and 8840 transitions. [2020-11-11 15:15:15,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:15:15,885 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 106 [2020-11-11 15:15:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:15,890 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:15:15,890 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:15:15,891 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:15:15,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:15:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2327. [2020-11-11 15:15:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 2.719690455717971) internal successors, (6326), 2326 states have internal predecessors, (6326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 6326 transitions. [2020-11-11 15:15:15,934 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 6326 transitions. Word has length 106 [2020-11-11 15:15:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:15,934 INFO L481 AbstractCegarLoop]: Abstraction has 2327 states and 6326 transitions. [2020-11-11 15:15:15,934 INFO L482 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) [2020-11-11 15:15:15,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 6326 transitions. [2020-11-11 15:15:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:15,937 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:15,937 INFO L494 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] [2020-11-11 15:15:16,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-11-11 15:15:16,138 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:16,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1239771958, now seen corresponding path program 123 times [2020-11-11 15:15:16,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:16,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097234052] [2020-11-11 15:15:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:16,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097234052] [2020-11-11 15:15:16,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370209819] [2020-11-11 15:15:16,684 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 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 [2020-11-11 15:15:16,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:15:16,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:16,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:15:16,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:16,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:16,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:16,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:16,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075540045] [2020-11-11 15:15:16,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:16,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:16,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:16,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:16,929 INFO L87 Difference]: Start difference. First operand 2327 states and 6326 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:18,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:18,500 INFO L93 Difference]: Finished difference Result 3520 states and 8890 transitions. [2020-11-11 15:15:18,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:15:18,502 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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 106 [2020-11-11 15:15:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:18,507 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:15:18,507 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:15:18,508 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=528, Invalid=1824, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:15:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:15:18,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2377. [2020-11-11 15:15:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.725589225589226) internal successors, (6476), 2376 states have internal predecessors, (6476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 6476 transitions. [2020-11-11 15:15:18,552 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 6476 transitions. Word has length 106 [2020-11-11 15:15:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:18,552 INFO L481 AbstractCegarLoop]: Abstraction has 2377 states and 6476 transitions. [2020-11-11 15:15:18,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:18,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 6476 transitions. [2020-11-11 15:15:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:18,555 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:18,555 INFO L494 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] [2020-11-11 15:15:18,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-11-11 15:15:18,756 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:18,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:18,757 INFO L82 PathProgramCache]: Analyzing trace with hash 672606084, now seen corresponding path program 124 times [2020-11-11 15:15:18,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:18,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144894595] [2020-11-11 15:15:18,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:19,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144894595] [2020-11-11 15:15:19,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503492991] [2020-11-11 15:15:19,237 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 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 [2020-11-11 15:15:19,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:19,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:19,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:19,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:19,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:19,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:19,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:19,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611663381] [2020-11-11 15:15:19,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:19,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:19,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:19,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:19,419 INFO L87 Difference]: Start difference. First operand 2377 states and 6476 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) [2020-11-11 15:15:20,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:20,851 INFO L93 Difference]: Finished difference Result 3520 states and 8940 transitions. [2020-11-11 15:15:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:15:20,855 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 106 [2020-11-11 15:15:20,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:20,861 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:15:20,861 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:15:20,862 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:15:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:15:20,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2427. [2020-11-11 15:15:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 2.731244847485573) internal successors, (6626), 2426 states have internal predecessors, (6626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 6626 transitions. [2020-11-11 15:15:20,906 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 6626 transitions. Word has length 106 [2020-11-11 15:15:20,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:20,906 INFO L481 AbstractCegarLoop]: Abstraction has 2427 states and 6626 transitions. [2020-11-11 15:15:20,906 INFO L482 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) [2020-11-11 15:15:20,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 6626 transitions. [2020-11-11 15:15:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:20,909 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:20,909 INFO L494 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] [2020-11-11 15:15:21,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-11-11 15:15:21,118 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:21,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1501317236, now seen corresponding path program 125 times [2020-11-11 15:15:21,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:21,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711305662] [2020-11-11 15:15:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:21,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711305662] [2020-11-11 15:15:21,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072538533] [2020-11-11 15:15:21,625 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 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 [2020-11-11 15:15:21,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:15:21,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:21,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:21,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:21,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:21,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:21,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:21,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:21,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754166405] [2020-11-11 15:15:21,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:21,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:21,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:21,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:21,859 INFO L87 Difference]: Start difference. First operand 2427 states and 6626 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:23,832 INFO L93 Difference]: Finished difference Result 3520 states and 8990 transitions. [2020-11-11 15:15:23,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:15:23,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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 106 [2020-11-11 15:15:23,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:23,839 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:15:23,839 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:15:23,840 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:15:23,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:15:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2477. [2020-11-11 15:15:23,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 2.736672051696284) internal successors, (6776), 2476 states have internal predecessors, (6776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 6776 transitions. [2020-11-11 15:15:23,887 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 6776 transitions. Word has length 106 [2020-11-11 15:15:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:23,887 INFO L481 AbstractCegarLoop]: Abstraction has 2477 states and 6776 transitions. [2020-11-11 15:15:23,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 6776 transitions. [2020-11-11 15:15:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:23,890 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:23,890 INFO L494 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] [2020-11-11 15:15:24,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:24,091 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:24,092 INFO L82 PathProgramCache]: Analyzing trace with hash -221221310, now seen corresponding path program 126 times [2020-11-11 15:15:24,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:24,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71724853] [2020-11-11 15:15:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:24,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71724853] [2020-11-11 15:15:24,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649597107] [2020-11-11 15:15:24,476 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 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 [2020-11-11 15:15:24,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:15:24,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:24,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:24,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:24,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:24,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:24,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167138843] [2020-11-11 15:15:24,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:24,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:24,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:24,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:24,683 INFO L87 Difference]: Start difference. First operand 2477 states and 6776 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) [2020-11-11 15:15:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:26,268 INFO L93 Difference]: Finished difference Result 3520 states and 9040 transitions. [2020-11-11 15:15:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:15:26,270 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 106 [2020-11-11 15:15:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:26,276 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:15:26,276 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:15:26,276 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:15:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:15:26,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2527. [2020-11-11 15:15:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 2.741884402216944) internal successors, (6926), 2526 states have internal predecessors, (6926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 6926 transitions. [2020-11-11 15:15:26,322 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 6926 transitions. Word has length 106 [2020-11-11 15:15:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:26,323 INFO L481 AbstractCegarLoop]: Abstraction has 2527 states and 6926 transitions. [2020-11-11 15:15:26,323 INFO L482 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) [2020-11-11 15:15:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 6926 transitions. [2020-11-11 15:15:26,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:26,325 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:26,326 INFO L494 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] [2020-11-11 15:15:26,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:26,526 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:26,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1760756942, now seen corresponding path program 127 times [2020-11-11 15:15:26,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:26,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133354601] [2020-11-11 15:15:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:27,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133354601] [2020-11-11 15:15:27,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643994920] [2020-11-11 15:15:27,010 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 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 [2020-11-11 15:15:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:27,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:27,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:27,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:27,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:27,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:27,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:27,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229891294] [2020-11-11 15:15:27,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:27,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:27,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:27,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:27,250 INFO L87 Difference]: Start difference. First operand 2527 states and 6926 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:29,182 INFO L93 Difference]: Finished difference Result 3520 states and 9090 transitions. [2020-11-11 15:15:29,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:15:29,183 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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 106 [2020-11-11 15:15:29,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:29,188 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:15:29,188 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:15:29,189 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:15:29,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:15:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2577. [2020-11-11 15:15:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 2.7468944099378882) internal successors, (7076), 2576 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 7076 transitions. [2020-11-11 15:15:29,227 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 7076 transitions. Word has length 106 [2020-11-11 15:15:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:29,228 INFO L481 AbstractCegarLoop]: Abstraction has 2577 states and 7076 transitions. [2020-11-11 15:15:29,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 7076 transitions. [2020-11-11 15:15:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:29,230 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:29,230 INFO L494 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] [2020-11-11 15:15:29,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-11-11 15:15:29,431 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:29,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:29,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1177643648, now seen corresponding path program 128 times [2020-11-11 15:15:29,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:29,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060304460] [2020-11-11 15:15:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:29,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060304460] [2020-11-11 15:15:29,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784625459] [2020-11-11 15:15:29,773 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 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 [2020-11-11 15:15:29,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:29,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:29,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:29,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:29,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:29,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:29,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:29,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137399127] [2020-11-11 15:15:29,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:29,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:29,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:29,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:29,928 INFO L87 Difference]: Start difference. First operand 2577 states and 7076 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) [2020-11-11 15:15:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:31,544 INFO L93 Difference]: Finished difference Result 3520 states and 9140 transitions. [2020-11-11 15:15:31,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:15:31,544 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 106 [2020-11-11 15:15:31,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:31,550 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:15:31,550 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:15:31,551 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:15:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:15:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2627. [2020-11-11 15:15:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.7517136329017515) internal successors, (7226), 2626 states have internal predecessors, (7226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 7226 transitions. [2020-11-11 15:15:31,599 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 7226 transitions. Word has length 106 [2020-11-11 15:15:31,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:31,600 INFO L481 AbstractCegarLoop]: Abstraction has 2627 states and 7226 transitions. [2020-11-11 15:15:31,600 INFO L482 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) [2020-11-11 15:15:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 7226 transitions. [2020-11-11 15:15:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:31,602 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:31,602 INFO L494 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] [2020-11-11 15:15:31,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-11-11 15:15:31,803 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:31,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:31,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1285790864, now seen corresponding path program 129 times [2020-11-11 15:15:31,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:31,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753787334] [2020-11-11 15:15:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:32,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753787334] [2020-11-11 15:15:32,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710648303] [2020-11-11 15:15:32,282 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 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 [2020-11-11 15:15:32,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:15:32,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:32,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:32,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:32,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:32,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:32,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:32,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904789695] [2020-11-11 15:15:32,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:32,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:32,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:32,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:32,548 INFO L87 Difference]: Start difference. First operand 2627 states and 7226 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:34,642 INFO L93 Difference]: Finished difference Result 3565 states and 9310 transitions. [2020-11-11 15:15:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:15:34,642 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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 106 [2020-11-11 15:15:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:34,647 INFO L225 Difference]: With dead ends: 3565 [2020-11-11 15:15:34,647 INFO L226 Difference]: Without dead ends: 3295 [2020-11-11 15:15:34,647 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=714, Invalid=2256, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:15:34,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2020-11-11 15:15:34,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 2677. [2020-11-11 15:15:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2676 states have (on average 2.7619581464872947) internal successors, (7391), 2676 states have internal predecessors, (7391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 7391 transitions. [2020-11-11 15:15:34,687 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 7391 transitions. Word has length 106 [2020-11-11 15:15:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:34,687 INFO L481 AbstractCegarLoop]: Abstraction has 2677 states and 7391 transitions. [2020-11-11 15:15:34,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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) [2020-11-11 15:15:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 7391 transitions. [2020-11-11 15:15:34,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:34,690 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:34,690 INFO L494 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] [2020-11-11 15:15:34,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:34,891 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:34,891 INFO L82 PathProgramCache]: Analyzing trace with hash -656999362, now seen corresponding path program 130 times [2020-11-11 15:15:34,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:34,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215157119] [2020-11-11 15:15:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:35,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215157119] [2020-11-11 15:15:35,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524126633] [2020-11-11 15:15:35,389 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 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 [2020-11-11 15:15:35,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:35,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:35,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:35,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:35,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:35,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:35,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:35,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509501510] [2020-11-11 15:15:35,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:35,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:35,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:35,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:35,570 INFO L87 Difference]: Start difference. First operand 2677 states and 7391 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) [2020-11-11 15:15:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:37,421 INFO L93 Difference]: Finished difference Result 4652 states and 12444 transitions. [2020-11-11 15:15:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:15:37,422 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 106 [2020-11-11 15:15:37,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:37,430 INFO L225 Difference]: With dead ends: 4652 [2020-11-11 15:15:37,430 INFO L226 Difference]: Without dead ends: 4382 [2020-11-11 15:15:37,431 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:15:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2020-11-11 15:15:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 2802. [2020-11-11 15:15:37,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 2.7782934666190644) internal successors, (7782), 2801 states have internal predecessors, (7782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 7782 transitions. [2020-11-11 15:15:37,489 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 7782 transitions. Word has length 106 [2020-11-11 15:15:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:37,489 INFO L481 AbstractCegarLoop]: Abstraction has 2802 states and 7782 transitions. [2020-11-11 15:15:37,489 INFO L482 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) [2020-11-11 15:15:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 7782 transitions. [2020-11-11 15:15:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:37,492 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:37,492 INFO L494 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] [2020-11-11 15:15:37,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:37,693 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:37,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:37,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1054208592, now seen corresponding path program 131 times [2020-11-11 15:15:37,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:37,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893247984] [2020-11-11 15:15:37,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:38,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893247984] [2020-11-11 15:15:38,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252643479] [2020-11-11 15:15:38,182 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 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 [2020-11-11 15:15:38,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:15:38,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:38,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:38,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:38,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:38,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:38,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:38,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:38,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890222809] [2020-11-11 15:15:38,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:38,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:38,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:38,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:38,405 INFO L87 Difference]: Start difference. First operand 2802 states and 7782 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) [2020-11-11 15:15:40,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:40,645 INFO L93 Difference]: Finished difference Result 3691 states and 9800 transitions. [2020-11-11 15:15:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:15:40,645 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 106 [2020-11-11 15:15:40,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:40,651 INFO L225 Difference]: With dead ends: 3691 [2020-11-11 15:15:40,651 INFO L226 Difference]: Without dead ends: 3280 [2020-11-11 15:15:40,652 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=935, Invalid=2371, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:15:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2020-11-11 15:15:40,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2052. [2020-11-11 15:15:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 2.6942954656265234) internal successors, (5526), 2051 states have internal predecessors, (5526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:40,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5526 transitions. [2020-11-11 15:15:40,695 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5526 transitions. Word has length 106 [2020-11-11 15:15:40,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:40,695 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5526 transitions. [2020-11-11 15:15:40,696 INFO L482 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) [2020-11-11 15:15:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5526 transitions. [2020-11-11 15:15:40,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:40,698 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:40,698 INFO L494 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] [2020-11-11 15:15:40,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:40,900 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:40,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:40,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1102839963, now seen corresponding path program 132 times [2020-11-11 15:15:40,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:40,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976489819] [2020-11-11 15:15:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:41,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976489819] [2020-11-11 15:15:41,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659936465] [2020-11-11 15:15:41,462 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 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 [2020-11-11 15:15:41,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:15:41,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:41,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:41,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:41,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:41,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:41,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:15:41,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726653282] [2020-11-11 15:15:41,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:41,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:41,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:41,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:41,616 INFO L87 Difference]: Start difference. First operand 2052 states and 5526 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:42,856 INFO L93 Difference]: Finished difference Result 3245 states and 8090 transitions. [2020-11-11 15:15:42,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:15:42,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:15:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:42,862 INFO L225 Difference]: With dead ends: 3245 [2020-11-11 15:15:42,862 INFO L226 Difference]: Without dead ends: 2975 [2020-11-11 15:15:42,863 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:15:42,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2020-11-11 15:15:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2102. [2020-11-11 15:15:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2101 states have (on average 2.701570680628272) internal successors, (5676), 2101 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 5676 transitions. [2020-11-11 15:15:42,899 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 5676 transitions. Word has length 111 [2020-11-11 15:15:42,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:42,899 INFO L481 AbstractCegarLoop]: Abstraction has 2102 states and 5676 transitions. [2020-11-11 15:15:42,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 5676 transitions. [2020-11-11 15:15:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:42,901 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:42,901 INFO L494 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] [2020-11-11 15:15:43,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-11-11 15:15:43,103 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:43,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1036947371, now seen corresponding path program 133 times [2020-11-11 15:15:43,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:43,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818116102] [2020-11-11 15:15:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:43,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818116102] [2020-11-11 15:15:43,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283515238] [2020-11-11 15:15:43,716 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 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 [2020-11-11 15:15:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:43,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:43,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:43,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:43,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:43,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:43,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:15:43,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985459864] [2020-11-11 15:15:43,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:43,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:43,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:43,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:43,879 INFO L87 Difference]: Start difference. First operand 2102 states and 5676 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) [2020-11-11 15:15:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:45,236 INFO L93 Difference]: Finished difference Result 3640 states and 8930 transitions. [2020-11-11 15:15:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:15:45,237 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 111 [2020-11-11 15:15:45,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:45,243 INFO L225 Difference]: With dead ends: 3640 [2020-11-11 15:15:45,243 INFO L226 Difference]: Without dead ends: 3370 [2020-11-11 15:15:45,243 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:15:45,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2020-11-11 15:15:45,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 2152. [2020-11-11 15:15:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 2.708507670850767) internal successors, (5826), 2151 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:45,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 5826 transitions. [2020-11-11 15:15:45,286 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 5826 transitions. Word has length 111 [2020-11-11 15:15:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:45,286 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 5826 transitions. [2020-11-11 15:15:45,286 INFO L482 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) [2020-11-11 15:15:45,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 5826 transitions. [2020-11-11 15:15:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:45,288 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:45,288 INFO L494 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] [2020-11-11 15:15:45,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-11-11 15:15:45,489 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash -962645981, now seen corresponding path program 134 times [2020-11-11 15:15:45,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:45,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663221147] [2020-11-11 15:15:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:46,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663221147] [2020-11-11 15:15:46,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705651813] [2020-11-11 15:15:46,098 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 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 [2020-11-11 15:15:46,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:46,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:46,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:46,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:46,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:46,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:46,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:15:46,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692929173] [2020-11-11 15:15:46,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:46,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:46,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:46,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:46,243 INFO L87 Difference]: Start difference. First operand 2152 states and 5826 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:47,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:47,670 INFO L93 Difference]: Finished difference Result 3645 states and 8990 transitions. [2020-11-11 15:15:47,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:15:47,672 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:15:47,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:47,678 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:47,678 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:47,678 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:15:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2202. [2020-11-11 15:15:47,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.7151294865970015) internal successors, (5976), 2201 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 5976 transitions. [2020-11-11 15:15:47,721 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 5976 transitions. Word has length 111 [2020-11-11 15:15:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:47,722 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 5976 transitions. [2020-11-11 15:15:47,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 5976 transitions. [2020-11-11 15:15:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:47,725 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:47,725 INFO L494 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] [2020-11-11 15:15:47,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-11-11 15:15:47,926 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:47,927 INFO L82 PathProgramCache]: Analyzing trace with hash -326628077, now seen corresponding path program 135 times [2020-11-11 15:15:47,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:47,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344012276] [2020-11-11 15:15:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:48,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344012276] [2020-11-11 15:15:48,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150086834] [2020-11-11 15:15:48,475 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 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 [2020-11-11 15:15:48,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:15:48,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:48,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-11 15:15:48,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:48,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:48,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:48,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:15:48,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035914402] [2020-11-11 15:15:48,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:48,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:48,640 INFO L87 Difference]: Start difference. First operand 2202 states and 5976 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) [2020-11-11 15:15:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:50,280 INFO L93 Difference]: Finished difference Result 3645 states and 9040 transitions. [2020-11-11 15:15:50,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:15:50,282 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 111 [2020-11-11 15:15:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:50,288 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:50,288 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:50,288 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=547, Invalid=1805, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:15:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2252. [2020-11-11 15:15:50,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 2.7214571301643713) internal successors, (6126), 2251 states have internal predecessors, (6126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 6126 transitions. [2020-11-11 15:15:50,333 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 6126 transitions. Word has length 111 [2020-11-11 15:15:50,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:50,333 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 6126 transitions. [2020-11-11 15:15:50,333 INFO L482 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) [2020-11-11 15:15:50,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 6126 transitions. [2020-11-11 15:15:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:50,336 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:50,336 INFO L494 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] [2020-11-11 15:15:50,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-11-11 15:15:50,537 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:50,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:50,538 INFO L82 PathProgramCache]: Analyzing trace with hash -216099231, now seen corresponding path program 136 times [2020-11-11 15:15:50,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:50,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056496228] [2020-11-11 15:15:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:51,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056496228] [2020-11-11 15:15:51,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521870896] [2020-11-11 15:15:51,054 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 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 [2020-11-11 15:15:51,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:51,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:51,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:51,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:51,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:51,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:51,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:15:51,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454003018] [2020-11-11 15:15:51,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:51,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:51,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:51,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:51,217 INFO L87 Difference]: Start difference. First operand 2252 states and 6126 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:52,743 INFO L93 Difference]: Finished difference Result 3645 states and 9090 transitions. [2020-11-11 15:15:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:15:52,743 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:15:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:52,748 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:52,748 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:52,749 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:15:52,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2302. [2020-11-11 15:15:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 2.727509778357236) internal successors, (6276), 2301 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 6276 transitions. [2020-11-11 15:15:52,784 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 6276 transitions. Word has length 111 [2020-11-11 15:15:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:52,784 INFO L481 AbstractCegarLoop]: Abstraction has 2302 states and 6276 transitions. [2020-11-11 15:15:52,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 6276 transitions. [2020-11-11 15:15:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:52,787 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:52,788 INFO L494 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] [2020-11-11 15:15:52,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-11-11 15:15:52,988 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:52,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1847189329, now seen corresponding path program 137 times [2020-11-11 15:15:52,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:52,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527055631] [2020-11-11 15:15:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:53,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527055631] [2020-11-11 15:15:53,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328103628] [2020-11-11 15:15:53,606 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 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 [2020-11-11 15:15:53,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:15:53,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:53,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:53,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:53,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:53,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:53,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:53,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:15:53,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815920807] [2020-11-11 15:15:53,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:53,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:53,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:53,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:53,824 INFO L87 Difference]: Start difference. First operand 2302 states and 6276 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) [2020-11-11 15:15:55,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:55,478 INFO L93 Difference]: Finished difference Result 3645 states and 9140 transitions. [2020-11-11 15:15:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:15:55,479 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 111 [2020-11-11 15:15:55,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:55,485 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:55,485 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:55,485 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:15:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:55,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2352. [2020-11-11 15:15:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.7333049766057) internal successors, (6426), 2351 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:55,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6426 transitions. [2020-11-11 15:15:55,531 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6426 transitions. Word has length 111 [2020-11-11 15:15:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:55,532 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 6426 transitions. [2020-11-11 15:15:55,532 INFO L482 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) [2020-11-11 15:15:55,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6426 transitions. [2020-11-11 15:15:55,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:55,534 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:55,534 INFO L494 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] [2020-11-11 15:15:55,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-11-11 15:15:55,735 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:55,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1409225247, now seen corresponding path program 138 times [2020-11-11 15:15:55,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:55,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531941795] [2020-11-11 15:15:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:56,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531941795] [2020-11-11 15:15:56,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787229691] [2020-11-11 15:15:56,286 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 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 [2020-11-11 15:15:56,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:15:56,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:56,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:56,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:56,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:56,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:56,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:15:56,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126948939] [2020-11-11 15:15:56,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:56,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:56,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:56,444 INFO L87 Difference]: Start difference. First operand 2352 states and 6426 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:57,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:57,930 INFO L93 Difference]: Finished difference Result 3645 states and 9190 transitions. [2020-11-11 15:15:57,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:15:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:15:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:57,936 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:57,936 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:57,936 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:15:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:57,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2402. [2020-11-11 15:15:57,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.7388588088296544) internal successors, (6576), 2401 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6576 transitions. [2020-11-11 15:15:57,976 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6576 transitions. Word has length 111 [2020-11-11 15:15:57,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:57,977 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 6576 transitions. [2020-11-11 15:15:57,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:57,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6576 transitions. [2020-11-11 15:15:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:57,979 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:57,979 INFO L494 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] [2020-11-11 15:15:58,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:58,180 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash -136067313, now seen corresponding path program 139 times [2020-11-11 15:15:58,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:58,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058448275] [2020-11-11 15:15:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:58,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058448275] [2020-11-11 15:15:58,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029664308] [2020-11-11 15:15:58,630 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 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 [2020-11-11 15:15:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:58,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:58,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:58,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:58,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:58,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:58,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:15:58,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830310233] [2020-11-11 15:15:58,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:58,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:58,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:58,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:58,809 INFO L87 Difference]: Start difference. First operand 2402 states and 6576 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) [2020-11-11 15:16:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:00,446 INFO L93 Difference]: Finished difference Result 3645 states and 9240 transitions. [2020-11-11 15:16:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:16:00,448 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 111 [2020-11-11 15:16:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:00,453 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:16:00,453 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:16:00,454 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:16:00,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:16:00,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2452. [2020-11-11 15:16:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 2.744186046511628) internal successors, (6726), 2451 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 6726 transitions. [2020-11-11 15:16:00,500 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 6726 transitions. Word has length 111 [2020-11-11 15:16:00,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:00,501 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 6726 transitions. [2020-11-11 15:16:00,501 INFO L482 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) [2020-11-11 15:16:00,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 6726 transitions. [2020-11-11 15:16:00,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:16:00,504 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:00,504 INFO L494 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] [2020-11-11 15:16:00,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-11-11 15:16:00,706 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:00,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:00,706 INFO L82 PathProgramCache]: Analyzing trace with hash -703233187, now seen corresponding path program 140 times [2020-11-11 15:16:00,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:00,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956492371] [2020-11-11 15:16:00,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:01,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956492371] [2020-11-11 15:16:01,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115179558] [2020-11-11 15:16:01,239 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 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 [2020-11-11 15:16:01,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:16:01,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:01,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:16:01,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:01,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:01,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:01,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:16:01,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949407253] [2020-11-11 15:16:01,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:16:01,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:01,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:16:01,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:16:01,401 INFO L87 Difference]: Start difference. First operand 2452 states and 6726 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:03,035 INFO L93 Difference]: Finished difference Result 3645 states and 9290 transitions. [2020-11-11 15:16:03,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:16:03,036 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:16:03,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:03,043 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:16:03,043 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:16:03,044 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:16:03,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:16:03,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2502. [2020-11-11 15:16:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.7493002798880446) internal successors, (6876), 2501 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6876 transitions. [2020-11-11 15:16:03,095 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6876 transitions. Word has length 111 [2020-11-11 15:16:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:03,095 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6876 transitions. [2020-11-11 15:16:03,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6876 transitions. [2020-11-11 15:16:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:16:03,097 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:03,097 INFO L494 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] [2020-11-11 15:16:03,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:03,298 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:03,299 INFO L82 PathProgramCache]: Analyzing trace with hash 125477965, now seen corresponding path program 141 times [2020-11-11 15:16:03,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:03,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168923414] [2020-11-11 15:16:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:03,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168923414] [2020-11-11 15:16:03,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963447451] [2020-11-11 15:16:03,876 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 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 [2020-11-11 15:16:03,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:16:03,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:16:03,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:04,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:04,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:04,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:16:04,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238111267] [2020-11-11 15:16:04,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:04,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:04,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:04,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:04,059 INFO L87 Difference]: Start difference. First operand 2502 states and 6876 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) [2020-11-11 15:16:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:06,091 INFO L93 Difference]: Finished difference Result 3645 states and 9340 transitions. [2020-11-11 15:16:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:16:06,093 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 111 [2020-11-11 15:16:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:06,099 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:16:06,099 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:16:06,099 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=688, Invalid=2282, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:16:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:16:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2552. [2020-11-11 15:16:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.7542140337122696) internal successors, (7026), 2551 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 7026 transitions. [2020-11-11 15:16:06,149 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 7026 transitions. Word has length 111 [2020-11-11 15:16:06,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:06,150 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 7026 transitions. [2020-11-11 15:16:06,150 INFO L482 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) [2020-11-11 15:16:06,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 7026 transitions. [2020-11-11 15:16:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:16:06,153 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:06,153 INFO L494 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] [2020-11-11 15:16:06,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:06,354 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:06,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1597060581, now seen corresponding path program 142 times [2020-11-11 15:16:06,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:06,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068329003] [2020-11-11 15:16:06,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:06,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068329003] [2020-11-11 15:16:06,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495973619] [2020-11-11 15:16:06,816 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 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 [2020-11-11 15:16:06,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:16:06,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:06,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:16:06,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:06,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:06,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:06,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:16:06,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866410513] [2020-11-11 15:16:06,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:16:06,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:06,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:16:06,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:16:06,970 INFO L87 Difference]: Start difference. First operand 2552 states and 7026 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:08,734 INFO L93 Difference]: Finished difference Result 3645 states and 9390 transitions. [2020-11-11 15:16:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:16:08,735 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:16:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:08,740 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:16:08,740 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:16:08,741 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:16:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:16:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2602. [2020-11-11 15:16:08,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2601 states have (on average 2.758938869665513) internal successors, (7176), 2601 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 7176 transitions. [2020-11-11 15:16:08,784 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 7176 transitions. Word has length 111 [2020-11-11 15:16:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:08,784 INFO L481 AbstractCegarLoop]: Abstraction has 2602 states and 7176 transitions. [2020-11-11 15:16:08,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:08,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 7176 transitions. [2020-11-11 15:16:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:16:08,787 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:08,787 INFO L494 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] [2020-11-11 15:16:08,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:08,987 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1158371083, now seen corresponding path program 143 times [2020-11-11 15:16:08,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:08,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827709951] [2020-11-11 15:16:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:09,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827709951] [2020-11-11 15:16:09,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369484989] [2020-11-11 15:16:09,503 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 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 [2020-11-11 15:16:09,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:16:09,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:09,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:16:09,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:09,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:09,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:09,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:09,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:16:09,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40405494] [2020-11-11 15:16:09,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:09,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:09,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:09,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:09,697 INFO L87 Difference]: Start difference. First operand 2602 states and 7176 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) [2020-11-11 15:16:11,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:11,891 INFO L93 Difference]: Finished difference Result 3645 states and 9440 transitions. [2020-11-11 15:16:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:16:11,893 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 111 [2020-11-11 15:16:11,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:11,898 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:16:11,898 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:16:11,899 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=809, Invalid=2383, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:16:11,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:16:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2652. [2020-11-11 15:16:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.763485477178423) internal successors, (7326), 2651 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 7326 transitions. [2020-11-11 15:16:11,948 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 7326 transitions. Word has length 111 [2020-11-11 15:16:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:11,949 INFO L481 AbstractCegarLoop]: Abstraction has 2652 states and 7326 transitions. [2020-11-11 15:16:11,949 INFO L482 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) [2020-11-11 15:16:11,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 7326 transitions. [2020-11-11 15:16:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:16:11,952 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:11,952 INFO L494 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] [2020-11-11 15:16:12,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:12,153 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:12,154 INFO L82 PathProgramCache]: Analyzing trace with hash -198195623, now seen corresponding path program 144 times [2020-11-11 15:16:12,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:12,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623338094] [2020-11-11 15:16:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:12,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623338094] [2020-11-11 15:16:12,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283963344] [2020-11-11 15:16:12,676 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 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 [2020-11-11 15:16:12,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:16:12,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:12,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:12,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:12,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:12,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:16:12,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875224777] [2020-11-11 15:16:12,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:16:12,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:12,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:16:12,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:16:12,842 INFO L87 Difference]: Start difference. First operand 2652 states and 7326 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:14,502 INFO L93 Difference]: Finished difference Result 3645 states and 9490 transitions. [2020-11-11 15:16:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:16:14,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:16:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:14,510 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:16:14,510 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:16:14,511 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:16:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:16:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2702. [2020-11-11 15:16:14,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 2.767863754165124) internal successors, (7476), 2701 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:14,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 7476 transitions. [2020-11-11 15:16:14,564 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 7476 transitions. Word has length 111 [2020-11-11 15:16:14,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:14,564 INFO L481 AbstractCegarLoop]: Abstraction has 2702 states and 7476 transitions. [2020-11-11 15:16:14,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 7476 transitions. [2020-11-11 15:16:14,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:16:14,567 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:14,568 INFO L494 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] [2020-11-11 15:16:14,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-11-11 15:16:14,768 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:14,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1633337161, now seen corresponding path program 145 times [2020-11-11 15:16:14,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:14,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311695801] [2020-11-11 15:16:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:15,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311695801] [2020-11-11 15:16:15,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149952147] [2020-11-11 15:16:15,351 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 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 [2020-11-11 15:16:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:16:15,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:15,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:15,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:15,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:15,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:16:15,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460710960] [2020-11-11 15:16:15,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:15,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:15,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:15,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:15,554 INFO L87 Difference]: Start difference. First operand 2702 states and 7476 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) [2020-11-11 15:16:17,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:17,941 INFO L93 Difference]: Finished difference Result 3690 states and 9660 transitions. [2020-11-11 15:16:17,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:16:17,942 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 111 [2020-11-11 15:16:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:17,949 INFO L225 Difference]: With dead ends: 3690 [2020-11-11 15:16:17,949 INFO L226 Difference]: Without dead ends: 3420 [2020-11-11 15:16:17,950 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=913, Invalid=2509, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:16:17,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2020-11-11 15:16:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2752. [2020-11-11 15:16:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 2.7775354416575793) internal successors, (7641), 2751 states have internal predecessors, (7641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 7641 transitions. [2020-11-11 15:16:18,012 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 7641 transitions. Word has length 111 [2020-11-11 15:16:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:18,012 INFO L481 AbstractCegarLoop]: Abstraction has 2752 states and 7641 transitions. [2020-11-11 15:16:18,012 INFO L482 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) [2020-11-11 15:16:18,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 7641 transitions. [2020-11-11 15:16:18,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:16:18,015 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:18,015 INFO L494 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] [2020-11-11 15:16:18,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-11-11 15:16:18,216 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:18,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2032838633, now seen corresponding path program 146 times [2020-11-11 15:16:18,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:18,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13182750] [2020-11-11 15:16:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:18,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13182750] [2020-11-11 15:16:18,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994699431] [2020-11-11 15:16:18,647 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 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 [2020-11-11 15:16:18,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:16:18,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:18,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:18,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:18,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:18,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:18,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:16:18,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276418853] [2020-11-11 15:16:18,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:16:18,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:18,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:16:18,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:16:18,843 INFO L87 Difference]: Start difference. First operand 2752 states and 7641 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:20,919 INFO L93 Difference]: Finished difference Result 4752 states and 12744 transitions. [2020-11-11 15:16:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:16:20,920 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:16:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:20,928 INFO L225 Difference]: With dead ends: 4752 [2020-11-11 15:16:20,928 INFO L226 Difference]: Without dead ends: 4482 [2020-11-11 15:16:20,929 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1000, Invalid=2422, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:16:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2020-11-11 15:16:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 2877. [2020-11-11 15:16:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2876 states have (on average 2.7927677329624476) internal successors, (8032), 2876 states have internal predecessors, (8032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 8032 transitions. [2020-11-11 15:16:20,989 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 8032 transitions. Word has length 111 [2020-11-11 15:16:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:20,989 INFO L481 AbstractCegarLoop]: Abstraction has 2877 states and 8032 transitions. [2020-11-11 15:16:20,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 8032 transitions. [2020-11-11 15:16:20,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:16:20,993 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:20,993 INFO L494 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] [2020-11-11 15:16:21,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-11-11 15:16:21,194 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:21,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:21,195 INFO L82 PathProgramCache]: Analyzing trace with hash -321630679, now seen corresponding path program 147 times [2020-11-11 15:16:21,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:21,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418799335] [2020-11-11 15:16:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:21,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418799335] [2020-11-11 15:16:21,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679606027] [2020-11-11 15:16:21,726 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 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 [2020-11-11 15:16:21,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:16:21,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:21,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:21,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:21,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:21,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:21,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:16:21,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419143924] [2020-11-11 15:16:21,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:21,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:21,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:21,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:21,943 INFO L87 Difference]: Start difference. First operand 2877 states and 8032 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) [2020-11-11 15:16:24,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:24,278 INFO L93 Difference]: Finished difference Result 3766 states and 10050 transitions. [2020-11-11 15:16:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:16:24,280 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 111 [2020-11-11 15:16:24,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:24,286 INFO L225 Difference]: With dead ends: 3766 [2020-11-11 15:16:24,287 INFO L226 Difference]: Without dead ends: 3355 [2020-11-11 15:16:24,287 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=949, Invalid=2711, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 15:16:24,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2020-11-11 15:16:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 1991. [2020-11-11 15:16:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 2.6974874371859294) internal successors, (5368), 1990 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 5368 transitions. [2020-11-11 15:16:24,326 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 5368 transitions. Word has length 111 [2020-11-11 15:16:24,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:24,326 INFO L481 AbstractCegarLoop]: Abstraction has 1991 states and 5368 transitions. [2020-11-11 15:16:24,326 INFO L482 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) [2020-11-11 15:16:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 5368 transitions. [2020-11-11 15:16:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:24,329 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:24,329 INFO L494 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] [2020-11-11 15:16:24,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-11-11 15:16:24,530 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:24,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:24,531 INFO L82 PathProgramCache]: Analyzing trace with hash -475852177, now seen corresponding path program 148 times [2020-11-11 15:16:24,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:24,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735149233] [2020-11-11 15:16:24,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:25,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735149233] [2020-11-11 15:16:25,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959688819] [2020-11-11 15:16:25,298 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 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 [2020-11-11 15:16:25,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:16:25,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:25,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:16:25,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:25,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:25,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:25,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:25,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2020-11-11 15:16:25,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242013093] [2020-11-11 15:16:25,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:16:25,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:25,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:16:25,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:16:25,534 INFO L87 Difference]: Start difference. First operand 1991 states and 5368 transitions. Second operand has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:27,140 INFO L93 Difference]: Finished difference Result 3209 states and 8252 transitions. [2020-11-11 15:16:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:16:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 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 116 [2020-11-11 15:16:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:27,146 INFO L225 Difference]: With dead ends: 3209 [2020-11-11 15:16:27,147 INFO L226 Difference]: Without dead ends: 2875 [2020-11-11 15:16:27,147 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=680, Invalid=1870, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:16:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2020-11-11 15:16:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2076. [2020-11-11 15:16:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.6689156626506025) internal successors, (5538), 2075 states have internal predecessors, (5538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 5538 transitions. [2020-11-11 15:16:27,186 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 5538 transitions. Word has length 116 [2020-11-11 15:16:27,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:27,186 INFO L481 AbstractCegarLoop]: Abstraction has 2076 states and 5538 transitions. [2020-11-11 15:16:27,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 5538 transitions. [2020-11-11 15:16:27,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:27,190 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:27,190 INFO L494 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] [2020-11-11 15:16:27,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:27,391 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:27,392 INFO L82 PathProgramCache]: Analyzing trace with hash -847396067, now seen corresponding path program 149 times [2020-11-11 15:16:27,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:27,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051102298] [2020-11-11 15:16:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:27,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051102298] [2020-11-11 15:16:27,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818386623] [2020-11-11 15:16:27,995 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 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 [2020-11-11 15:16:28,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:16:28,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:28,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:28,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:28,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:28,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:28,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:28,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16311545] [2020-11-11 15:16:28,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:28,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:28,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:28,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:28,167 INFO L87 Difference]: Start difference. First operand 2076 states and 5538 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:29,115 INFO L93 Difference]: Finished difference Result 3860 states and 9320 transitions. [2020-11-11 15:16:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:16:29,117 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 116 [2020-11-11 15:16:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:29,122 INFO L225 Difference]: With dead ends: 3860 [2020-11-11 15:16:29,122 INFO L226 Difference]: Without dead ends: 3590 [2020-11-11 15:16:29,123 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=543, Invalid=1437, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 15:16:29,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2020-11-11 15:16:29,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 2177. [2020-11-11 15:16:29,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 2.677389705882353) internal successors, (5826), 2176 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 5826 transitions. [2020-11-11 15:16:29,160 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 5826 transitions. Word has length 116 [2020-11-11 15:16:29,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:29,160 INFO L481 AbstractCegarLoop]: Abstraction has 2177 states and 5826 transitions. [2020-11-11 15:16:29,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:29,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 5826 transitions. [2020-11-11 15:16:29,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:29,162 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:29,162 INFO L494 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] [2020-11-11 15:16:29,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-11-11 15:16:29,365 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:29,366 INFO L82 PathProgramCache]: Analyzing trace with hash 835110925, now seen corresponding path program 150 times [2020-11-11 15:16:29,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:29,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805748382] [2020-11-11 15:16:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:29,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805748382] [2020-11-11 15:16:29,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970029575] [2020-11-11 15:16:29,995 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 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 [2020-11-11 15:16:30,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:16:30,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:30,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:30,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:30,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:30,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:30,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:30,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-11-11 15:16:30,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320515343] [2020-11-11 15:16:30,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:30,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:30,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:30,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:30,216 INFO L87 Difference]: Start difference. First operand 2177 states and 5826 transitions. Second operand has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:16:31,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:31,370 INFO L93 Difference]: Finished difference Result 3795 states and 9240 transitions. [2020-11-11 15:16:31,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:16:31,371 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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 116 [2020-11-11 15:16:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:31,376 INFO L225 Difference]: With dead ends: 3795 [2020-11-11 15:16:31,376 INFO L226 Difference]: Without dead ends: 3525 [2020-11-11 15:16:31,376 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:16:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3525 states. [2020-11-11 15:16:31,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3525 to 2227. [2020-11-11 15:16:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 2.684636118598383) internal successors, (5976), 2226 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 5976 transitions. [2020-11-11 15:16:31,410 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 5976 transitions. Word has length 116 [2020-11-11 15:16:31,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:31,410 INFO L481 AbstractCegarLoop]: Abstraction has 2227 states and 5976 transitions. [2020-11-11 15:16:31,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:16:31,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 5976 transitions. [2020-11-11 15:16:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:31,412 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:31,412 INFO L494 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] [2020-11-11 15:16:31,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:31,613 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:31,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1017536933, now seen corresponding path program 151 times [2020-11-11 15:16:31,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:31,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882656872] [2020-11-11 15:16:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:32,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882656872] [2020-11-11 15:16:32,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692635748] [2020-11-11 15:16:32,148 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 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 [2020-11-11 15:16:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:32,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:32,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:32,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:32,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:32,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:32,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379326069] [2020-11-11 15:16:32,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:32,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:32,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:32,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:32,314 INFO L87 Difference]: Start difference. First operand 2227 states and 5976 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:33,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:33,353 INFO L93 Difference]: Finished difference Result 3820 states and 9340 transitions. [2020-11-11 15:16:33,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:16:33,354 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 116 [2020-11-11 15:16:33,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:33,357 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:33,358 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:33,358 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=549, Invalid=1613, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:16:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2277. [2020-11-11 15:16:33,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2276 states have (on average 2.6915641476274166) internal successors, (6126), 2276 states have internal predecessors, (6126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 6126 transitions. [2020-11-11 15:16:33,405 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 6126 transitions. Word has length 116 [2020-11-11 15:16:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:33,405 INFO L481 AbstractCegarLoop]: Abstraction has 2277 states and 6126 transitions. [2020-11-11 15:16:33,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:33,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 6126 transitions. [2020-11-11 15:16:33,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:33,408 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:33,408 INFO L494 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] [2020-11-11 15:16:33,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:33,622 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:33,622 INFO L82 PathProgramCache]: Analyzing trace with hash -951644341, now seen corresponding path program 152 times [2020-11-11 15:16:33,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:33,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380183460] [2020-11-11 15:16:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:34,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380183460] [2020-11-11 15:16:34,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365250730] [2020-11-11 15:16:34,185 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 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 [2020-11-11 15:16:34,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:16:34,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:34,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:34,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:34,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:34,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:34,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:34,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-11-11 15:16:34,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506407471] [2020-11-11 15:16:34,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:34,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:34,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:34,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:34,406 INFO L87 Difference]: Start difference. First operand 2277 states and 6126 transitions. Second operand has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:16:35,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:35,714 INFO L93 Difference]: Finished difference Result 3820 states and 9390 transitions. [2020-11-11 15:16:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:16:35,716 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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 116 [2020-11-11 15:16:35,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:35,721 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:35,721 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:35,722 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=622, Invalid=1928, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:16:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:35,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2327. [2020-11-11 15:16:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 2.698194325021496) internal successors, (6276), 2326 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 6276 transitions. [2020-11-11 15:16:35,759 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 6276 transitions. Word has length 116 [2020-11-11 15:16:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:35,760 INFO L481 AbstractCegarLoop]: Abstraction has 2327 states and 6276 transitions. [2020-11-11 15:16:35,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:16:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 6276 transitions. [2020-11-11 15:16:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:35,762 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:35,762 INFO L494 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] [2020-11-11 15:16:35,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:35,963 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:35,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:35,963 INFO L82 PathProgramCache]: Analyzing trace with hash -877342951, now seen corresponding path program 153 times [2020-11-11 15:16:35,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:35,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937607445] [2020-11-11 15:16:35,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:36,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937607445] [2020-11-11 15:16:36,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546750196] [2020-11-11 15:16:36,500 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 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 [2020-11-11 15:16:36,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:16:36,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:36,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-11 15:16:36,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:36,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:36,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:36,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:36,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654869574] [2020-11-11 15:16:36,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:36,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:36,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:36,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:36,670 INFO L87 Difference]: Start difference. First operand 2327 states and 6276 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:37,836 INFO L93 Difference]: Finished difference Result 3820 states and 9440 transitions. [2020-11-11 15:16:37,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:16:37,837 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 116 [2020-11-11 15:16:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:37,842 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:37,842 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:37,843 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=571, Invalid=1781, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:16:37,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:37,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2377. [2020-11-11 15:16:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.7045454545454546) internal successors, (6426), 2376 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 6426 transitions. [2020-11-11 15:16:37,885 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 6426 transitions. Word has length 116 [2020-11-11 15:16:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:37,885 INFO L481 AbstractCegarLoop]: Abstraction has 2377 states and 6426 transitions. [2020-11-11 15:16:37,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:37,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 6426 transitions. [2020-11-11 15:16:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:37,887 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:37,887 INFO L494 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] [2020-11-11 15:16:38,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-11-11 15:16:38,088 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:38,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:38,088 INFO L82 PathProgramCache]: Analyzing trace with hash -241325047, now seen corresponding path program 154 times [2020-11-11 15:16:38,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:38,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734357818] [2020-11-11 15:16:38,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:38,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734357818] [2020-11-11 15:16:38,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004999444] [2020-11-11 15:16:38,654 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 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 [2020-11-11 15:16:38,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:16:38,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:38,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:38,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:38,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:38,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:38,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:38,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-11-11 15:16:38,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611912757] [2020-11-11 15:16:38,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:38,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:38,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:38,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:38,891 INFO L87 Difference]: Start difference. First operand 2377 states and 6426 transitions. Second operand has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:16:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:40,312 INFO L93 Difference]: Finished difference Result 3820 states and 9490 transitions. [2020-11-11 15:16:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:16:40,314 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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 116 [2020-11-11 15:16:40,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:40,318 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:40,318 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:40,319 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:16:40,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:40,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2427. [2020-11-11 15:16:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 2.7106347897774112) internal successors, (6576), 2426 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 6576 transitions. [2020-11-11 15:16:40,356 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 6576 transitions. Word has length 116 [2020-11-11 15:16:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:40,356 INFO L481 AbstractCegarLoop]: Abstraction has 2427 states and 6576 transitions. [2020-11-11 15:16:40,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:16:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 6576 transitions. [2020-11-11 15:16:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:40,358 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:40,358 INFO L494 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] [2020-11-11 15:16:40,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:40,559 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash -130796201, now seen corresponding path program 155 times [2020-11-11 15:16:40,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:40,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339559765] [2020-11-11 15:16:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:41,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339559765] [2020-11-11 15:16:41,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478677512] [2020-11-11 15:16:41,033 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 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 [2020-11-11 15:16:41,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:16:41,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:41,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:41,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:41,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:41,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:41,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:41,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811498572] [2020-11-11 15:16:41,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:41,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:41,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:41,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:41,218 INFO L87 Difference]: Start difference. First operand 2427 states and 6576 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:42,545 INFO L93 Difference]: Finished difference Result 3820 states and 9540 transitions. [2020-11-11 15:16:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:16:42,545 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 116 [2020-11-11 15:16:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:42,550 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:42,550 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:42,551 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=609, Invalid=1941, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:16:42,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:42,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2477. [2020-11-11 15:16:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 2.7164781906300486) internal successors, (6726), 2476 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 6726 transitions. [2020-11-11 15:16:42,587 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 6726 transitions. Word has length 116 [2020-11-11 15:16:42,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:42,587 INFO L481 AbstractCegarLoop]: Abstraction has 2477 states and 6726 transitions. [2020-11-11 15:16:42,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:42,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 6726 transitions. [2020-11-11 15:16:42,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:42,589 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:42,590 INFO L494 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] [2020-11-11 15:16:42,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-11-11 15:16:42,790 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:42,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1932492359, now seen corresponding path program 156 times [2020-11-11 15:16:42,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:42,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552069349] [2020-11-11 15:16:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:43,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552069349] [2020-11-11 15:16:43,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607165297] [2020-11-11 15:16:43,299 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 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 [2020-11-11 15:16:43,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:16:43,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:43,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:43,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:43,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:43,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:43,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:43,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-11-11 15:16:43,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897360482] [2020-11-11 15:16:43,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:43,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:43,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:43,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:43,510 INFO L87 Difference]: Start difference. First operand 2477 states and 6726 transitions. Second operand has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:16:45,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:45,123 INFO L93 Difference]: Finished difference Result 3820 states and 9590 transitions. [2020-11-11 15:16:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:16:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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 116 [2020-11-11 15:16:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:45,130 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:45,130 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:45,131 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=698, Invalid=2272, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:16:45,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:45,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2527. [2020-11-11 15:16:45,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 2.7220902612826605) internal successors, (6876), 2526 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 6876 transitions. [2020-11-11 15:16:45,197 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 6876 transitions. Word has length 116 [2020-11-11 15:16:45,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:45,197 INFO L481 AbstractCegarLoop]: Abstraction has 2527 states and 6876 transitions. [2020-11-11 15:16:45,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:16:45,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 6876 transitions. [2020-11-11 15:16:45,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:45,199 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:45,200 INFO L494 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] [2020-11-11 15:16:45,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:45,408 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:45,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1494528277, now seen corresponding path program 157 times [2020-11-11 15:16:45,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:45,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125387499] [2020-11-11 15:16:45,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:45,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125387499] [2020-11-11 15:16:45,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362009330] [2020-11-11 15:16:45,898 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 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 [2020-11-11 15:16:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:45,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:45,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:46,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:46,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:46,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:46,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115049920] [2020-11-11 15:16:46,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:46,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:46,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:46,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:46,068 INFO L87 Difference]: Start difference. First operand 2527 states and 6876 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:47,390 INFO L93 Difference]: Finished difference Result 3820 states and 9640 transitions. [2020-11-11 15:16:47,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:16:47,391 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 116 [2020-11-11 15:16:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:47,396 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:47,396 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:47,396 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=663, Invalid=2093, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:16:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2577. [2020-11-11 15:16:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 2.7274844720496896) internal successors, (7026), 2576 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 7026 transitions. [2020-11-11 15:16:47,437 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 7026 transitions. Word has length 116 [2020-11-11 15:16:47,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:47,438 INFO L481 AbstractCegarLoop]: Abstraction has 2577 states and 7026 transitions. [2020-11-11 15:16:47,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 7026 transitions. [2020-11-11 15:16:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:47,440 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:47,441 INFO L494 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] [2020-11-11 15:16:47,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-11-11 15:16:47,641 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:47,642 INFO L82 PathProgramCache]: Analyzing trace with hash -50764283, now seen corresponding path program 158 times [2020-11-11 15:16:47,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:47,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080463093] [2020-11-11 15:16:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:48,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080463093] [2020-11-11 15:16:48,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380112956] [2020-11-11 15:16:48,160 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 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 [2020-11-11 15:16:48,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:16:48,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:48,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:48,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:48,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:48,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:48,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:48,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-11-11 15:16:48,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227745212] [2020-11-11 15:16:48,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:48,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:48,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:48,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:48,407 INFO L87 Difference]: Start difference. First operand 2577 states and 7026 transitions. Second operand has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:16:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:50,183 INFO L93 Difference]: Finished difference Result 3820 states and 9690 transitions. [2020-11-11 15:16:50,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:16:50,184 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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 116 [2020-11-11 15:16:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:50,190 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:50,190 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:50,191 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=760, Invalid=2432, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:16:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:50,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2627. [2020-11-11 15:16:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.732673267326733) internal successors, (7176), 2626 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:50,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 7176 transitions. [2020-11-11 15:16:50,231 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 7176 transitions. Word has length 116 [2020-11-11 15:16:50,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:50,231 INFO L481 AbstractCegarLoop]: Abstraction has 2627 states and 7176 transitions. [2020-11-11 15:16:50,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:16:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 7176 transitions. [2020-11-11 15:16:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:50,233 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:50,234 INFO L494 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] [2020-11-11 15:16:50,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-11-11 15:16:50,434 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:50,435 INFO L82 PathProgramCache]: Analyzing trace with hash -617930157, now seen corresponding path program 159 times [2020-11-11 15:16:50,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:50,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989170027] [2020-11-11 15:16:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:50,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989170027] [2020-11-11 15:16:50,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250782995] [2020-11-11 15:16:50,985 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 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 [2020-11-11 15:16:51,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:16:51,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:51,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:16:51,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:51,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:51,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:51,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:51,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591924885] [2020-11-11 15:16:51,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:51,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:51,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:51,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:51,184 INFO L87 Difference]: Start difference. First operand 2627 states and 7176 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:52,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:52,830 INFO L93 Difference]: Finished difference Result 3820 states and 9740 transitions. [2020-11-11 15:16:52,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:16:52,831 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 116 [2020-11-11 15:16:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:52,838 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:52,838 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:52,839 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=733, Invalid=2237, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:16:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:52,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2677. [2020-11-11 15:16:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2676 states have (on average 2.7376681614349776) internal successors, (7326), 2676 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 7326 transitions. [2020-11-11 15:16:52,892 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 7326 transitions. Word has length 116 [2020-11-11 15:16:52,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:52,892 INFO L481 AbstractCegarLoop]: Abstraction has 2677 states and 7326 transitions. [2020-11-11 15:16:52,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:52,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 7326 transitions. [2020-11-11 15:16:52,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:52,896 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:52,896 INFO L494 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] [2020-11-11 15:16:53,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:53,097 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:53,097 INFO L82 PathProgramCache]: Analyzing trace with hash 210780995, now seen corresponding path program 160 times [2020-11-11 15:16:53,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:53,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996219605] [2020-11-11 15:16:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:53,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996219605] [2020-11-11 15:16:53,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619841384] [2020-11-11 15:16:53,648 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 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 [2020-11-11 15:16:53,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:16:53,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:53,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:53,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:53,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:53,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:53,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:53,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-11-11 15:16:53,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156643929] [2020-11-11 15:16:53,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:53,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:53,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:53,874 INFO L87 Difference]: Start difference. First operand 2677 states and 7326 transitions. Second operand has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:16:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:55,790 INFO L93 Difference]: Finished difference Result 3820 states and 9790 transitions. [2020-11-11 15:16:55,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:16:55,791 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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 116 [2020-11-11 15:16:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:55,796 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:55,796 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:55,796 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=838, Invalid=2584, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:16:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:55,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2727. [2020-11-11 15:16:55,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 2.7424798239178285) internal successors, (7476), 2726 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 7476 transitions. [2020-11-11 15:16:55,839 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 7476 transitions. Word has length 116 [2020-11-11 15:16:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:55,839 INFO L481 AbstractCegarLoop]: Abstraction has 2727 states and 7476 transitions. [2020-11-11 15:16:55,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:16:55,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 7476 transitions. [2020-11-11 15:16:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:55,842 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:55,842 INFO L494 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] [2020-11-11 15:16:56,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:56,046 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:56,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1511757551, now seen corresponding path program 161 times [2020-11-11 15:16:56,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:56,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535257787] [2020-11-11 15:16:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:56,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535257787] [2020-11-11 15:16:56,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809742687] [2020-11-11 15:16:56,591 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 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 [2020-11-11 15:16:56,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:16:56,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:56,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:56,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:56,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:56,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:56,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053183113] [2020-11-11 15:16:56,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:56,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:56,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:56,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:56,786 INFO L87 Difference]: Start difference. First operand 2727 states and 7476 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:58,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:58,607 INFO L93 Difference]: Finished difference Result 3820 states and 9840 transitions. [2020-11-11 15:16:58,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:16:58,609 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 116 [2020-11-11 15:16:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:58,616 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:58,616 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:58,616 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=819, Invalid=2373, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:16:58,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2777. [2020-11-11 15:16:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2776 states have (on average 2.7471181556195967) internal successors, (7626), 2776 states have internal predecessors, (7626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 7626 transitions. [2020-11-11 15:16:58,686 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 7626 transitions. Word has length 116 [2020-11-11 15:16:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:58,687 INFO L481 AbstractCegarLoop]: Abstraction has 2777 states and 7626 transitions. [2020-11-11 15:16:58,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:16:58,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 7626 transitions. [2020-11-11 15:16:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:58,690 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:58,690 INFO L494 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] [2020-11-11 15:16:58,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-11-11 15:16:58,891 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:58,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1243674113, now seen corresponding path program 162 times [2020-11-11 15:16:58,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:58,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750682609] [2020-11-11 15:16:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:59,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750682609] [2020-11-11 15:16:59,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974573971] [2020-11-11 15:16:59,402 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 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 [2020-11-11 15:16:59,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:16:59,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:59,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:16:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:59,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:59,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:59,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-11-11 15:16:59,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572919919] [2020-11-11 15:16:59,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:59,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:59,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:59,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:59,679 INFO L87 Difference]: Start difference. First operand 2777 states and 7626 transitions. Second operand has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:17:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:01,839 INFO L93 Difference]: Finished difference Result 3820 states and 9890 transitions. [2020-11-11 15:17:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:17:01,841 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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 116 [2020-11-11 15:17:01,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:01,845 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:17:01,845 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:17:01,846 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=799, Invalid=2623, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:17:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:17:01,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2827. [2020-11-11 15:17:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 2.751592356687898) internal successors, (7776), 2826 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 7776 transitions. [2020-11-11 15:17:01,892 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 7776 transitions. Word has length 116 [2020-11-11 15:17:01,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:01,892 INFO L481 AbstractCegarLoop]: Abstraction has 2827 states and 7776 transitions. [2020-11-11 15:17:01,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:17:01,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 7776 transitions. [2020-11-11 15:17:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:17:01,896 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:01,896 INFO L494 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] [2020-11-11 15:17:02,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:02,097 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:02,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:02,098 INFO L82 PathProgramCache]: Analyzing trace with hash -112892593, now seen corresponding path program 163 times [2020-11-11 15:17:02,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:02,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860706306] [2020-11-11 15:17:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:02,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860706306] [2020-11-11 15:17:02,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678082425] [2020-11-11 15:17:02,721 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 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 [2020-11-11 15:17:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:02,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:17:02,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:02,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:02,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:02,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:17:02,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124595238] [2020-11-11 15:17:02,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:17:02,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:02,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:17:02,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:17:02,927 INFO L87 Difference]: Start difference. First operand 2827 states and 7776 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:17:04,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:04,795 INFO L93 Difference]: Finished difference Result 3820 states and 9940 transitions. [2020-11-11 15:17:04,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:17:04,797 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 116 [2020-11-11 15:17:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:04,804 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:17:04,804 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:17:04,805 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=921, Invalid=2501, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:17:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:17:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2877. [2020-11-11 15:17:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2876 states have (on average 2.755910987482615) internal successors, (7926), 2876 states have internal predecessors, (7926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:04,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 7926 transitions. [2020-11-11 15:17:04,861 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 7926 transitions. Word has length 116 [2020-11-11 15:17:04,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:04,862 INFO L481 AbstractCegarLoop]: Abstraction has 2877 states and 7926 transitions. [2020-11-11 15:17:04,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:17:04,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 7926 transitions. [2020-11-11 15:17:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:17:04,865 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:04,865 INFO L494 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] [2020-11-11 15:17:05,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:05,066 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:05,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:05,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1718640191, now seen corresponding path program 164 times [2020-11-11 15:17:05,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:05,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026996010] [2020-11-11 15:17:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:05,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026996010] [2020-11-11 15:17:05,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790382528] [2020-11-11 15:17:05,612 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 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 [2020-11-11 15:17:05,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:17:05,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:05,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:17:05,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:05,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:05,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:05,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:05,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-11-11 15:17:05,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083785618] [2020-11-11 15:17:05,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:05,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:05,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:05,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:05,881 INFO L87 Difference]: Start difference. First operand 2877 states and 7926 transitions. Second operand has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:17:08,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:08,309 INFO L93 Difference]: Finished difference Result 3865 states and 10110 transitions. [2020-11-11 15:17:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:17:08,311 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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 116 [2020-11-11 15:17:08,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:08,316 INFO L225 Difference]: With dead ends: 3865 [2020-11-11 15:17:08,316 INFO L226 Difference]: Without dead ends: 3595 [2020-11-11 15:17:08,316 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1042, Invalid=2864, Unknown=0, NotChecked=0, Total=3906 [2020-11-11 15:17:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2020-11-11 15:17:08,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 2927. [2020-11-11 15:17:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 2.7652084757347914) internal successors, (8091), 2926 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 8091 transitions. [2020-11-11 15:17:08,388 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 8091 transitions. Word has length 116 [2020-11-11 15:17:08,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:08,388 INFO L481 AbstractCegarLoop]: Abstraction has 2927 states and 8091 transitions. [2020-11-11 15:17:08,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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) [2020-11-11 15:17:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 8091 transitions. [2020-11-11 15:17:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:17:08,393 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:08,393 INFO L494 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] [2020-11-11 15:17:08,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:08,609 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:08,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:08,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1947535603, now seen corresponding path program 165 times [2020-11-11 15:17:08,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:08,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565648943] [2020-11-11 15:17:08,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:09,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565648943] [2020-11-11 15:17:09,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443898761] [2020-11-11 15:17:09,073 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 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 [2020-11-11 15:17:09,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:17:09,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:09,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:09,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:09,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:09,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:09,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:17:09,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944980459] [2020-11-11 15:17:09,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:17:09,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:09,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:17:09,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:17:09,276 INFO L87 Difference]: Start difference. First operand 2927 states and 8091 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:17:11,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:11,310 INFO L93 Difference]: Finished difference Result 4952 states and 13244 transitions. [2020-11-11 15:17:11,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:17:11,311 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 116 [2020-11-11 15:17:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:11,318 INFO L225 Difference]: With dead ends: 4952 [2020-11-11 15:17:11,319 INFO L226 Difference]: Without dead ends: 4682 [2020-11-11 15:17:11,319 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1040, Invalid=2620, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 15:17:11,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4682 states. [2020-11-11 15:17:11,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4682 to 3052. [2020-11-11 15:17:11,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3051 states have (on average 2.780072107505736) internal successors, (8482), 3051 states have internal predecessors, (8482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 8482 transitions. [2020-11-11 15:17:11,373 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 8482 transitions. Word has length 116 [2020-11-11 15:17:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:11,373 INFO L481 AbstractCegarLoop]: Abstraction has 3052 states and 8482 transitions. [2020-11-11 15:17:11,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:17:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 8482 transitions. [2020-11-11 15:17:11,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:17:11,375 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:11,375 INFO L494 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] [2020-11-11 15:17:11,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2020-11-11 15:17:11,576 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:11,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:11,577 INFO L82 PathProgramCache]: Analyzing trace with hash -236327649, now seen corresponding path program 166 times [2020-11-11 15:17:11,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:11,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122298817] [2020-11-11 15:17:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:12,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122298817] [2020-11-11 15:17:12,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334301328] [2020-11-11 15:17:12,091 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 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 [2020-11-11 15:17:12,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:17:12,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:12,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:17:12,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:12,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:12,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:12,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:12,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:17:12,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505992730] [2020-11-11 15:17:12,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:17:12,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:12,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:17:12,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:17:12,294 INFO L87 Difference]: Start difference. First operand 3052 states and 8482 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:17:14,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:14,955 INFO L93 Difference]: Finished difference Result 3991 states and 10600 transitions. [2020-11-11 15:17:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:17:14,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 116 [2020-11-11 15:17:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:14,963 INFO L225 Difference]: With dead ends: 3991 [2020-11-11 15:17:14,963 INFO L226 Difference]: Without dead ends: 3580 [2020-11-11 15:17:14,964 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:17:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2020-11-11 15:17:14,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 2202. [2020-11-11 15:17:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.692412539754657) internal successors, (5926), 2201 states have internal predecessors, (5926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 5926 transitions. [2020-11-11 15:17:15,007 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 5926 transitions. Word has length 116 [2020-11-11 15:17:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:15,008 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 5926 transitions. [2020-11-11 15:17:15,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2020-11-11 15:17:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 5926 transitions. [2020-11-11 15:17:15,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:15,010 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:15,010 INFO L494 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] [2020-11-11 15:17:15,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:15,211 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:15,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:15,212 INFO L82 PathProgramCache]: Analyzing trace with hash 392291254, now seen corresponding path program 167 times [2020-11-11 15:17:15,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:15,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068667158] [2020-11-11 15:17:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:15,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068667158] [2020-11-11 15:17:15,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982836624] [2020-11-11 15:17:15,925 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 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 [2020-11-11 15:17:16,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:17:16,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:16,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:16,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:16,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:16,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:16,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:16,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74421803] [2020-11-11 15:17:16,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:16,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:16,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:16,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:16,132 INFO L87 Difference]: Start difference. First operand 2202 states and 5926 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) [2020-11-11 15:17:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:17,518 INFO L93 Difference]: Finished difference Result 3495 states and 8690 transitions. [2020-11-11 15:17:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:17:17,519 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 121 [2020-11-11 15:17:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:17,524 INFO L225 Difference]: With dead ends: 3495 [2020-11-11 15:17:17,524 INFO L226 Difference]: Without dead ends: 3225 [2020-11-11 15:17:17,525 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:17:17,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2020-11-11 15:17:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2252. [2020-11-11 15:17:17,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 2.699244780097734) internal successors, (6076), 2251 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 6076 transitions. [2020-11-11 15:17:17,564 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 6076 transitions. Word has length 121 [2020-11-11 15:17:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:17,564 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 6076 transitions. [2020-11-11 15:17:17,564 INFO L482 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) [2020-11-11 15:17:17,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 6076 transitions. [2020-11-11 15:17:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:17,566 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:17,566 INFO L494 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] [2020-11-11 15:17:17,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-11-11 15:17:17,767 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:17,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2074798246, now seen corresponding path program 168 times [2020-11-11 15:17:17,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:17,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216306919] [2020-11-11 15:17:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:18,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216306919] [2020-11-11 15:17:18,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925605645] [2020-11-11 15:17:18,487 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 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 [2020-11-11 15:17:18,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:17:18,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:18,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:18,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:18,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:18,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:18,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:18,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:18,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298410304] [2020-11-11 15:17:18,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:18,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:18,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:18,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:18,751 INFO L87 Difference]: Start difference. First operand 2252 states and 6076 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:20,155 INFO L93 Difference]: Finished difference Result 3940 states and 9630 transitions. [2020-11-11 15:17:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:17:20,156 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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 121 [2020-11-11 15:17:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:20,161 INFO L225 Difference]: With dead ends: 3940 [2020-11-11 15:17:20,161 INFO L226 Difference]: Without dead ends: 3670 [2020-11-11 15:17:20,162 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=665, Invalid=1987, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:17:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2020-11-11 15:17:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2302. [2020-11-11 15:17:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 2.705780095610604) internal successors, (6226), 2301 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 6226 transitions. [2020-11-11 15:17:20,201 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 6226 transitions. Word has length 121 [2020-11-11 15:17:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:20,201 INFO L481 AbstractCegarLoop]: Abstraction has 2302 states and 6226 transitions. [2020-11-11 15:17:20,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:20,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 6226 transitions. [2020-11-11 15:17:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:20,204 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:20,204 INFO L494 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] [2020-11-11 15:17:20,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-11-11 15:17:20,405 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:20,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:20,405 INFO L82 PathProgramCache]: Analyzing trace with hash 222150388, now seen corresponding path program 169 times [2020-11-11 15:17:20,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:20,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074464381] [2020-11-11 15:17:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:21,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074464381] [2020-11-11 15:17:21,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006353916] [2020-11-11 15:17:21,124 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 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 [2020-11-11 15:17:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:21,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:21,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:21,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:21,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:21,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:21,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059660150] [2020-11-11 15:17:21,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:21,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:21,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:21,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:21,315 INFO L87 Difference]: Start difference. First operand 2302 states and 6226 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) [2020-11-11 15:17:22,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:22,781 INFO L93 Difference]: Finished difference Result 3945 states and 9690 transitions. [2020-11-11 15:17:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:17:22,783 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 121 [2020-11-11 15:17:22,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:22,790 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:22,790 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:22,790 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=663, Invalid=1989, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:17:22,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:22,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2352. [2020-11-11 15:17:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.712037430880476) internal successors, (6376), 2351 states have internal predecessors, (6376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6376 transitions. [2020-11-11 15:17:22,838 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6376 transitions. Word has length 121 [2020-11-11 15:17:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:22,838 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 6376 transitions. [2020-11-11 15:17:22,838 INFO L482 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) [2020-11-11 15:17:22,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6376 transitions. [2020-11-11 15:17:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:22,841 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:22,841 INFO L494 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] [2020-11-11 15:17:23,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:23,042 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:23,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:23,043 INFO L82 PathProgramCache]: Analyzing trace with hash 288042980, now seen corresponding path program 170 times [2020-11-11 15:17:23,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:23,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009300714] [2020-11-11 15:17:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:23,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009300714] [2020-11-11 15:17:23,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097138417] [2020-11-11 15:17:23,754 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 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 [2020-11-11 15:17:23,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:17:23,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:23,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:23,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:23,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:24,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:24,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:24,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:24,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860747666] [2020-11-11 15:17:24,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:24,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:24,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:24,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:24,025 INFO L87 Difference]: Start difference. First operand 2352 states and 6376 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:25,556 INFO L93 Difference]: Finished difference Result 3945 states and 9740 transitions. [2020-11-11 15:17:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:17:25,558 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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 121 [2020-11-11 15:17:25,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:25,563 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:25,563 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:25,563 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=686, Invalid=2176, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:17:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:25,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2402. [2020-11-11 15:17:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.7180341524364846) internal successors, (6526), 2401 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6526 transitions. [2020-11-11 15:17:25,601 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6526 transitions. Word has length 121 [2020-11-11 15:17:25,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:25,601 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 6526 transitions. [2020-11-11 15:17:25,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:25,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6526 transitions. [2020-11-11 15:17:25,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:25,603 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:25,603 INFO L494 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] [2020-11-11 15:17:25,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-11-11 15:17:25,804 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:25,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash 362344370, now seen corresponding path program 171 times [2020-11-11 15:17:25,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:25,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868442269] [2020-11-11 15:17:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:26,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868442269] [2020-11-11 15:17:26,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514373214] [2020-11-11 15:17:26,486 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 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 [2020-11-11 15:17:26,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:17:26,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:26,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-11 15:17:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:26,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:26,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:26,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:26,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275430541] [2020-11-11 15:17:26,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:26,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:26,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:26,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:26,692 INFO L87 Difference]: Start difference. First operand 2402 states and 6526 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) [2020-11-11 15:17:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:28,265 INFO L93 Difference]: Finished difference Result 3945 states and 9790 transitions. [2020-11-11 15:17:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:17:28,266 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 121 [2020-11-11 15:17:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:28,273 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:28,273 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:28,274 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=698, Invalid=2164, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:17:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2452. [2020-11-11 15:17:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 2.7237862097103225) internal successors, (6676), 2451 states have internal predecessors, (6676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 6676 transitions. [2020-11-11 15:17:28,321 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 6676 transitions. Word has length 121 [2020-11-11 15:17:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:28,321 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 6676 transitions. [2020-11-11 15:17:28,321 INFO L482 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) [2020-11-11 15:17:28,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 6676 transitions. [2020-11-11 15:17:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:28,324 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:28,325 INFO L494 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] [2020-11-11 15:17:28,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:28,526 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:28,526 INFO L82 PathProgramCache]: Analyzing trace with hash 998362274, now seen corresponding path program 172 times [2020-11-11 15:17:28,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:28,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018773089] [2020-11-11 15:17:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:29,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018773089] [2020-11-11 15:17:29,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705005967] [2020-11-11 15:17:29,220 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 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 [2020-11-11 15:17:29,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:17:29,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:29,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:17:29,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:29,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:29,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:29,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:29,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:29,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16545598] [2020-11-11 15:17:29,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:29,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:29,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:29,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:29,466 INFO L87 Difference]: Start difference. First operand 2452 states and 6676 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:31,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:31,451 INFO L93 Difference]: Finished difference Result 3945 states and 9840 transitions. [2020-11-11 15:17:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:17:31,453 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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 121 [2020-11-11 15:17:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:31,459 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:31,459 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:31,459 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:17:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2502. [2020-11-11 15:17:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.7293082766893244) internal successors, (6826), 2501 states have internal predecessors, (6826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6826 transitions. [2020-11-11 15:17:31,505 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6826 transitions. Word has length 121 [2020-11-11 15:17:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:31,505 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6826 transitions. [2020-11-11 15:17:31,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6826 transitions. [2020-11-11 15:17:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:31,508 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:31,508 INFO L494 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] [2020-11-11 15:17:31,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2020-11-11 15:17:31,709 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:31,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1108891120, now seen corresponding path program 173 times [2020-11-11 15:17:31,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:31,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951251879] [2020-11-11 15:17:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:32,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951251879] [2020-11-11 15:17:32,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207563545] [2020-11-11 15:17:32,361 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 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 [2020-11-11 15:17:32,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:17:32,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:32,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:32,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:32,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:32,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486688784] [2020-11-11 15:17:32,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:32,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:32,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:32,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:32,560 INFO L87 Difference]: Start difference. First operand 2502 states and 6826 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) [2020-11-11 15:17:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:34,123 INFO L93 Difference]: Finished difference Result 3945 states and 9890 transitions. [2020-11-11 15:17:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:17:34,125 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 121 [2020-11-11 15:17:34,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:34,131 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:34,131 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:34,132 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:17:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:34,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2552. [2020-11-11 15:17:34,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.7346138769110153) internal successors, (6976), 2551 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6976 transitions. [2020-11-11 15:17:34,185 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6976 transitions. Word has length 121 [2020-11-11 15:17:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:34,185 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 6976 transitions. [2020-11-11 15:17:34,185 INFO L482 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) [2020-11-11 15:17:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6976 transitions. [2020-11-11 15:17:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:34,188 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:34,188 INFO L494 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] [2020-11-11 15:17:34,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:34,389 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:34,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1122787616, now seen corresponding path program 174 times [2020-11-11 15:17:34,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:34,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541064698] [2020-11-11 15:17:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:35,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541064698] [2020-11-11 15:17:35,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151610647] [2020-11-11 15:17:35,113 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 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 [2020-11-11 15:17:35,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:17:35,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:35,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:35,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:35,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:35,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:35,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:35,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:35,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829371764] [2020-11-11 15:17:35,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:35,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:35,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:35,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:35,396 INFO L87 Difference]: Start difference. First operand 2552 states and 6976 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:37,408 INFO L93 Difference]: Finished difference Result 3945 states and 9940 transitions. [2020-11-11 15:17:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:17:37,409 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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 121 [2020-11-11 15:17:37,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:37,415 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:37,416 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:37,417 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=776, Invalid=2530, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:17:37,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:37,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2602. [2020-11-11 15:17:37,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2601 states have (on average 2.7397154940407535) internal successors, (7126), 2601 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:37,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 7126 transitions. [2020-11-11 15:17:37,472 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 7126 transitions. Word has length 121 [2020-11-11 15:17:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:37,472 INFO L481 AbstractCegarLoop]: Abstraction has 2602 states and 7126 transitions. [2020-11-11 15:17:37,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:37,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 7126 transitions. [2020-11-11 15:17:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:37,477 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:37,477 INFO L494 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] [2020-11-11 15:17:37,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:37,678 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:37,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:37,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1560751698, now seen corresponding path program 175 times [2020-11-11 15:17:37,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:37,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563342021] [2020-11-11 15:17:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:38,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563342021] [2020-11-11 15:17:38,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991292809] [2020-11-11 15:17:38,297 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 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 [2020-11-11 15:17:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:38,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:38,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:38,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:38,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:38,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86779874] [2020-11-11 15:17:38,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:38,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:38,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:38,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:38,484 INFO L87 Difference]: Start difference. First operand 2602 states and 7126 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) [2020-11-11 15:17:40,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:40,300 INFO L93 Difference]: Finished difference Result 3945 states and 9990 transitions. [2020-11-11 15:17:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:17:40,302 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 121 [2020-11-11 15:17:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:40,308 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:40,309 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:40,309 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=816, Invalid=2490, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:17:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2652. [2020-11-11 15:17:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.7446246699358734) internal successors, (7276), 2651 states have internal predecessors, (7276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 7276 transitions. [2020-11-11 15:17:40,363 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 7276 transitions. Word has length 121 [2020-11-11 15:17:40,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:40,364 INFO L481 AbstractCegarLoop]: Abstraction has 2652 states and 7276 transitions. [2020-11-11 15:17:40,364 INFO L482 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) [2020-11-11 15:17:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 7276 transitions. [2020-11-11 15:17:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:40,367 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:40,367 INFO L494 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] [2020-11-11 15:17:40,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:40,569 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:40,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1188923038, now seen corresponding path program 176 times [2020-11-11 15:17:40,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:40,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988969118] [2020-11-11 15:17:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:41,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988969118] [2020-11-11 15:17:41,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142431197] [2020-11-11 15:17:41,206 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 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 [2020-11-11 15:17:41,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:17:41,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:41,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:41,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:41,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:41,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:41,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:41,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:41,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208826133] [2020-11-11 15:17:41,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:41,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:41,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:41,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:41,473 INFO L87 Difference]: Start difference. First operand 2652 states and 7276 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:43,707 INFO L93 Difference]: Finished difference Result 3945 states and 10040 transitions. [2020-11-11 15:17:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:17:43,708 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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 121 [2020-11-11 15:17:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:43,714 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:43,714 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:43,714 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=845, Invalid=2695, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:17:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:43,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2702. [2020-11-11 15:17:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 2.7493520918178453) internal successors, (7426), 2701 states have internal predecessors, (7426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 7426 transitions. [2020-11-11 15:17:43,755 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 7426 transitions. Word has length 121 [2020-11-11 15:17:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:43,755 INFO L481 AbstractCegarLoop]: Abstraction has 2702 states and 7426 transitions. [2020-11-11 15:17:43,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 7426 transitions. [2020-11-11 15:17:43,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:43,758 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:43,758 INFO L494 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] [2020-11-11 15:17:43,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:43,959 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:43,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:43,959 INFO L82 PathProgramCache]: Analyzing trace with hash 621757164, now seen corresponding path program 177 times [2020-11-11 15:17:43,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:43,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804607769] [2020-11-11 15:17:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:44,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804607769] [2020-11-11 15:17:44,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140311911] [2020-11-11 15:17:44,566 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 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 [2020-11-11 15:17:44,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:17:44,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:44,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-11 15:17:44,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:44,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:44,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:44,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:44,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710434859] [2020-11-11 15:17:44,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:44,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:44,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:44,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:44,778 INFO L87 Difference]: Start difference. First operand 2702 states and 7426 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) [2020-11-11 15:17:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:46,658 INFO L93 Difference]: Finished difference Result 3945 states and 10090 transitions. [2020-11-11 15:17:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:17:46,659 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 121 [2020-11-11 15:17:46,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:46,664 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:46,664 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:46,665 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:17:46,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:46,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2752. [2020-11-11 15:17:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 2.7539076699382044) internal successors, (7576), 2751 states have internal predecessors, (7576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 7576 transitions. [2020-11-11 15:17:46,711 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 7576 transitions. Word has length 121 [2020-11-11 15:17:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:46,711 INFO L481 AbstractCegarLoop]: Abstraction has 2752 states and 7576 transitions. [2020-11-11 15:17:46,711 INFO L482 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) [2020-11-11 15:17:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 7576 transitions. [2020-11-11 15:17:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:46,714 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:46,714 INFO L494 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] [2020-11-11 15:17:46,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-11-11 15:17:46,915 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:46,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:46,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1450468316, now seen corresponding path program 178 times [2020-11-11 15:17:46,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:46,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794389304] [2020-11-11 15:17:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:47,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794389304] [2020-11-11 15:17:47,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144276225] [2020-11-11 15:17:47,550 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 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 [2020-11-11 15:17:47,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:17:47,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:47,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:17:47,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:47,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:47,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:47,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:47,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:47,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502417303] [2020-11-11 15:17:47,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:47,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:47,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:47,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:47,810 INFO L87 Difference]: Start difference. First operand 2752 states and 7576 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:50,290 INFO L93 Difference]: Finished difference Result 3945 states and 10140 transitions. [2020-11-11 15:17:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:17:50,291 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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 121 [2020-11-11 15:17:50,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:50,296 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:50,296 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:50,297 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:17:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2802. [2020-11-11 15:17:50,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 2.758300606926098) internal successors, (7726), 2801 states have internal predecessors, (7726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 7726 transitions. [2020-11-11 15:17:50,347 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 7726 transitions. Word has length 121 [2020-11-11 15:17:50,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:50,347 INFO L481 AbstractCegarLoop]: Abstraction has 2802 states and 7726 transitions. [2020-11-11 15:17:50,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:50,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 7726 transitions. [2020-11-11 15:17:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:50,351 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:50,351 INFO L494 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] [2020-11-11 15:17:50,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-11-11 15:17:50,551 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:50,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:50,552 INFO L82 PathProgramCache]: Analyzing trace with hash -272070230, now seen corresponding path program 179 times [2020-11-11 15:17:50,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:50,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059031859] [2020-11-11 15:17:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:51,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059031859] [2020-11-11 15:17:51,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790955412] [2020-11-11 15:17:51,113 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 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 [2020-11-11 15:17:51,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:17:51,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:51,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:51,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:51,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:51,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:51,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:51,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225301357] [2020-11-11 15:17:51,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:51,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:51,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:51,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:51,317 INFO L87 Difference]: Start difference. First operand 2802 states and 7726 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) [2020-11-11 15:17:53,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:53,387 INFO L93 Difference]: Finished difference Result 3945 states and 10190 transitions. [2020-11-11 15:17:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:17:53,388 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 121 [2020-11-11 15:17:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:53,414 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:53,415 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:53,415 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=998, Invalid=2784, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:17:53,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2852. [2020-11-11 15:17:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 2.7625394598386532) internal successors, (7876), 2851 states have internal predecessors, (7876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 7876 transitions. [2020-11-11 15:17:53,454 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 7876 transitions. Word has length 121 [2020-11-11 15:17:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:53,454 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 7876 transitions. [2020-11-11 15:17:53,454 INFO L482 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) [2020-11-11 15:17:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 7876 transitions. [2020-11-11 15:17:53,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:53,457 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:53,457 INFO L494 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] [2020-11-11 15:17:53,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-11-11 15:17:53,659 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:53,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1811605862, now seen corresponding path program 180 times [2020-11-11 15:17:53,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:53,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097101650] [2020-11-11 15:17:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:54,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097101650] [2020-11-11 15:17:54,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564579871] [2020-11-11 15:17:54,252 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 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 [2020-11-11 15:17:54,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:17:54,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:54,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:17:54,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:54,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:54,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:54,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:54,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153997065] [2020-11-11 15:17:54,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:54,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:54,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:54,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:54,501 INFO L87 Difference]: Start difference. First operand 2852 states and 7876 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:57,112 INFO L93 Difference]: Finished difference Result 3945 states and 10240 transitions. [2020-11-11 15:17:57,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:17:57,114 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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 121 [2020-11-11 15:17:57,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:57,121 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:57,121 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:57,122 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=965, Invalid=3067, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:17:57,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:57,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2902. [2020-11-11 15:17:57,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 2.7666321957945534) internal successors, (8026), 2901 states have internal predecessors, (8026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 8026 transitions. [2020-11-11 15:17:57,215 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 8026 transitions. Word has length 121 [2020-11-11 15:17:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:57,216 INFO L481 AbstractCegarLoop]: Abstraction has 2902 states and 8026 transitions. [2020-11-11 15:17:57,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:17:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 8026 transitions. [2020-11-11 15:17:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:57,221 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:57,221 INFO L494 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] [2020-11-11 15:17:57,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:57,425 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1126794728, now seen corresponding path program 181 times [2020-11-11 15:17:57,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:57,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888207175] [2020-11-11 15:17:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:58,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888207175] [2020-11-11 15:17:58,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669156388] [2020-11-11 15:17:58,053 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 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 [2020-11-11 15:17:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:58,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:58,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:58,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:58,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:58,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:58,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534544985] [2020-11-11 15:17:58,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:58,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:58,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:58,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:58,248 INFO L87 Difference]: Start difference. First operand 2902 states and 8026 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) [2020-11-11 15:18:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:00,400 INFO L93 Difference]: Finished difference Result 3945 states and 10290 transitions. [2020-11-11 15:18:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:18:00,402 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 121 [2020-11-11 15:18:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:00,408 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:18:00,408 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:18:00,409 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1113, Invalid=2919, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:18:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:18:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2952. [2020-11-11 15:18:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 2.7705862419518805) internal successors, (8176), 2951 states have internal predecessors, (8176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 8176 transitions. [2020-11-11 15:18:00,456 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 8176 transitions. Word has length 121 [2020-11-11 15:18:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:00,456 INFO L481 AbstractCegarLoop]: Abstraction has 2952 states and 8176 transitions. [2020-11-11 15:18:00,456 INFO L482 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) [2020-11-11 15:18:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 8176 transitions. [2020-11-11 15:18:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:18:00,459 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:00,459 INFO L494 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] [2020-11-11 15:18:00,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:00,660 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:00,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:00,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1336639784, now seen corresponding path program 182 times [2020-11-11 15:18:00,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:00,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341732650] [2020-11-11 15:18:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:01,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341732650] [2020-11-11 15:18:01,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716586137] [2020-11-11 15:18:01,224 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 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 [2020-11-11 15:18:01,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:18:01,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:01,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:18:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:01,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:01,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:01,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:01,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:18:01,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021499574] [2020-11-11 15:18:01,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:01,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:01,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:01,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:01,461 INFO L87 Difference]: Start difference. First operand 2952 states and 8176 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:18:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:03,958 INFO L93 Difference]: Finished difference Result 3990 states and 10460 transitions. [2020-11-11 15:18:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:18:03,959 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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 121 [2020-11-11 15:18:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:03,964 INFO L225 Difference]: With dead ends: 3990 [2020-11-11 15:18:03,964 INFO L226 Difference]: Without dead ends: 3720 [2020-11-11 15:18:03,965 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1148, Invalid=3142, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:18:03,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2020-11-11 15:18:04,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3002. [2020-11-11 15:18:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 2.7794068643785406) internal successors, (8341), 3001 states have internal predecessors, (8341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:04,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 8341 transitions. [2020-11-11 15:18:04,010 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 8341 transitions. Word has length 121 [2020-11-11 15:18:04,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:04,010 INFO L481 AbstractCegarLoop]: Abstraction has 3002 states and 8341 transitions. [2020-11-11 15:18:04,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2020-11-11 15:18:04,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 8341 transitions. [2020-11-11 15:18:04,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:18:04,013 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:04,013 INFO L494 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] [2020-11-11 15:18:04,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-11-11 15:18:04,214 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:04,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:04,214 INFO L82 PathProgramCache]: Analyzing trace with hash -707848282, now seen corresponding path program 183 times [2020-11-11 15:18:04,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:04,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564289453] [2020-11-11 15:18:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:04,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564289453] [2020-11-11 15:18:04,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878804362] [2020-11-11 15:18:04,768 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 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 [2020-11-11 15:18:04,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:18:04,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:04,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:04,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:04,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:04,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:04,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:18:04,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450868375] [2020-11-11 15:18:04,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:04,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:04,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:04,967 INFO L87 Difference]: Start difference. First operand 3002 states and 8341 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) [2020-11-11 15:18:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:07,143 INFO L93 Difference]: Finished difference Result 5052 states and 13544 transitions. [2020-11-11 15:18:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:18:07,144 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 121 [2020-11-11 15:18:07,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:07,152 INFO L225 Difference]: With dead ends: 5052 [2020-11-11 15:18:07,152 INFO L226 Difference]: Without dead ends: 4782 [2020-11-11 15:18:07,152 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1245, Invalid=3045, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:18:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4782 states. [2020-11-11 15:18:07,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4782 to 3127. [2020-11-11 15:18:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3127 states, 3126 states have (on average 2.7933461292386434) internal successors, (8732), 3126 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:07,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3127 states to 3127 states and 8732 transitions. [2020-11-11 15:18:07,206 INFO L78 Accepts]: Start accepts. Automaton has 3127 states and 8732 transitions. Word has length 121 [2020-11-11 15:18:07,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:07,206 INFO L481 AbstractCegarLoop]: Abstraction has 3127 states and 8732 transitions. [2020-11-11 15:18:07,207 INFO L482 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) [2020-11-11 15:18:07,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3127 states and 8732 transitions. [2020-11-11 15:18:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:18:07,209 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:07,209 INFO L494 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] [2020-11-11 15:18:07,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:07,410 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:07,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:07,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1003359672, now seen corresponding path program 184 times [2020-11-11 15:18:07,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:07,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479427970] [2020-11-11 15:18:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:07,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479427970] [2020-11-11 15:18:07,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024464427] [2020-11-11 15:18:07,966 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 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 [2020-11-11 15:18:08,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:18:08,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:08,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:18:08,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:08,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:08,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:08,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:08,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:18:08,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714127670] [2020-11-11 15:18:08,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:08,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:08,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:08,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:08,171 INFO L87 Difference]: Start difference. First operand 3127 states and 8732 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) [2020-11-11 15:18:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:10,810 INFO L93 Difference]: Finished difference Result 4066 states and 10850 transitions. [2020-11-11 15:18:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:18:10,812 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 121 [2020-11-11 15:18:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:10,818 INFO L225 Difference]: With dead ends: 4066 [2020-11-11 15:18:10,818 INFO L226 Difference]: Without dead ends: 3655 [2020-11-11 15:18:10,818 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2020-11-11 15:18:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2020-11-11 15:18:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2141. [2020-11-11 15:18:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 2.695327102803738) internal successors, (5768), 2140 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5768 transitions. [2020-11-11 15:18:10,853 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5768 transitions. Word has length 121 [2020-11-11 15:18:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:10,853 INFO L481 AbstractCegarLoop]: Abstraction has 2141 states and 5768 transitions. [2020-11-11 15:18:10,853 INFO L482 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) [2020-11-11 15:18:10,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5768 transitions. [2020-11-11 15:18:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:10,855 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:10,855 INFO L494 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] [2020-11-11 15:18:11,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:11,056 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash 473182784, now seen corresponding path program 185 times [2020-11-11 15:18:11,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:11,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531549519] [2020-11-11 15:18:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:11,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531549519] [2020-11-11 15:18:11,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401284709] [2020-11-11 15:18:11,798 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 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 [2020-11-11 15:18:11,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:18:11,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:11,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:18:11,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:11,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:12,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:12,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:12,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:18:12,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042985812] [2020-11-11 15:18:12,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:18:12,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:12,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:18:12,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:18:12,037 INFO L87 Difference]: Start difference. First operand 2141 states and 5768 transitions. Second operand has 28 states, 28 states have (on average 5.214285714285714) internal successors, (146), 28 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:13,501 INFO L93 Difference]: Finished difference Result 3409 states and 8752 transitions. [2020-11-11 15:18:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:18:13,502 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.214285714285714) internal successors, (146), 28 states have internal predecessors, (146), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:13,506 INFO L225 Difference]: With dead ends: 3409 [2020-11-11 15:18:13,507 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:18:13,507 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=760, Invalid=2102, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:18:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:18:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2226. [2020-11-11 15:18:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.66876404494382) internal successors, (5938), 2225 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:13,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 5938 transitions. [2020-11-11 15:18:13,540 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 5938 transitions. Word has length 126 [2020-11-11 15:18:13,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:13,540 INFO L481 AbstractCegarLoop]: Abstraction has 2226 states and 5938 transitions. [2020-11-11 15:18:13,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.214285714285714) internal successors, (146), 28 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:13,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 5938 transitions. [2020-11-11 15:18:13,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:13,542 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:13,542 INFO L494 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] [2020-11-11 15:18:13,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:13,743 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:13,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1810129262, now seen corresponding path program 186 times [2020-11-11 15:18:13,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:13,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507417992] [2020-11-11 15:18:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:14,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507417992] [2020-11-11 15:18:14,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632702075] [2020-11-11 15:18:14,479 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 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 [2020-11-11 15:18:14,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:18:14,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:14,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:14,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:14,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:14,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:14,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:14,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355570090] [2020-11-11 15:18:14,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:14,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:14,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:14,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:14,664 INFO L87 Difference]: Start difference. First operand 2226 states and 5938 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:15,868 INFO L93 Difference]: Finished difference Result 4160 states and 10020 transitions. [2020-11-11 15:18:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:18:15,870 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:15,875 INFO L225 Difference]: With dead ends: 4160 [2020-11-11 15:18:15,875 INFO L226 Difference]: Without dead ends: 3890 [2020-11-11 15:18:15,875 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:18:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2020-11-11 15:18:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 2327. [2020-11-11 15:18:15,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 2.6766981943250214) internal successors, (6226), 2326 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 6226 transitions. [2020-11-11 15:18:15,912 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 6226 transitions. Word has length 126 [2020-11-11 15:18:15,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:15,913 INFO L481 AbstractCegarLoop]: Abstraction has 2327 states and 6226 transitions. [2020-11-11 15:18:15,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:15,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 6226 transitions. [2020-11-11 15:18:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:15,915 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:15,915 INFO L494 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] [2020-11-11 15:18:16,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:16,116 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:16,116 INFO L82 PathProgramCache]: Analyzing trace with hash -232785314, now seen corresponding path program 187 times [2020-11-11 15:18:16,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:16,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413029057] [2020-11-11 15:18:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:16,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413029057] [2020-11-11 15:18:16,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570589472] [2020-11-11 15:18:16,918 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 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 [2020-11-11 15:18:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:17,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:17,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:17,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:17,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:17,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:17,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034883466] [2020-11-11 15:18:17,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:17,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:17,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:17,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:17,110 INFO L87 Difference]: Start difference. First operand 2327 states and 6226 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:18,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:18,621 INFO L93 Difference]: Finished difference Result 4095 states and 9940 transitions. [2020-11-11 15:18:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:18:18,623 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:18,628 INFO L225 Difference]: With dead ends: 4095 [2020-11-11 15:18:18,629 INFO L226 Difference]: Without dead ends: 3825 [2020-11-11 15:18:18,629 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:18:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2020-11-11 15:18:18,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 2377. [2020-11-11 15:18:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.6835016835016834) internal successors, (6376), 2376 states have internal predecessors, (6376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:18,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 6376 transitions. [2020-11-11 15:18:18,667 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 6376 transitions. Word has length 126 [2020-11-11 15:18:18,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:18,667 INFO L481 AbstractCegarLoop]: Abstraction has 2377 states and 6376 transitions. [2020-11-11 15:18:18,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:18,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 6376 transitions. [2020-11-11 15:18:18,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:18,669 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:18,670 INFO L494 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] [2020-11-11 15:18:18,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:18,871 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:18,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1068644564, now seen corresponding path program 188 times [2020-11-11 15:18:18,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:18,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722050715] [2020-11-11 15:18:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:19,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722050715] [2020-11-11 15:18:19,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988690869] [2020-11-11 15:18:19,588 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 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 [2020-11-11 15:18:19,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:18:19,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:19,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:19,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:19,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:19,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:19,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:19,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403004552] [2020-11-11 15:18:19,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:19,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:19,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:19,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:19,733 INFO L87 Difference]: Start difference. First operand 2377 states and 6376 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:21,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:21,093 INFO L93 Difference]: Finished difference Result 4120 states and 10040 transitions. [2020-11-11 15:18:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:18:21,095 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:21,100 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:18:21,100 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:18:21,100 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:18:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:18:21,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 2427. [2020-11-11 15:18:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 2.69002473206925) internal successors, (6526), 2426 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 6526 transitions. [2020-11-11 15:18:21,140 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 6526 transitions. Word has length 126 [2020-11-11 15:18:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:21,140 INFO L481 AbstractCegarLoop]: Abstraction has 2427 states and 6526 transitions. [2020-11-11 15:18:21,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 6526 transitions. [2020-11-11 15:18:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:21,143 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:21,143 INFO L494 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] [2020-11-11 15:18:21,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-11-11 15:18:21,344 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:21,345 INFO L82 PathProgramCache]: Analyzing trace with hash 613862428, now seen corresponding path program 189 times [2020-11-11 15:18:21,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:21,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437066546] [2020-11-11 15:18:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:22,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437066546] [2020-11-11 15:18:22,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596817643] [2020-11-11 15:18:22,094 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 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 [2020-11-11 15:18:22,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:18:22,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:22,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:22,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:22,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:22,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:22,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:22,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:22,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828044727] [2020-11-11 15:18:22,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:22,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:22,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:22,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:22,314 INFO L87 Difference]: Start difference. First operand 2427 states and 6526 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:24,018 INFO L93 Difference]: Finished difference Result 4120 states and 10090 transitions. [2020-11-11 15:18:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:18:24,019 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:24,024 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:18:24,024 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:18:24,025 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:18:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:18:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 2477. [2020-11-11 15:18:24,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 2.6962843295638126) internal successors, (6676), 2476 states have internal predecessors, (6676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 6676 transitions. [2020-11-11 15:18:24,064 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 6676 transitions. Word has length 126 [2020-11-11 15:18:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:24,064 INFO L481 AbstractCegarLoop]: Abstraction has 2477 states and 6676 transitions. [2020-11-11 15:18:24,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 6676 transitions. [2020-11-11 15:18:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:24,066 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:24,067 INFO L494 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] [2020-11-11 15:18:24,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-11-11 15:18:24,267 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:24,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1238785430, now seen corresponding path program 190 times [2020-11-11 15:18:24,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:24,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085266014] [2020-11-11 15:18:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:24,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085266014] [2020-11-11 15:18:24,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268023390] [2020-11-11 15:18:24,968 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 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 [2020-11-11 15:18:25,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:18:25,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:25,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:18:25,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:25,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:25,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:25,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:25,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640746498] [2020-11-11 15:18:25,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:25,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:25,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:25,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:25,112 INFO L87 Difference]: Start difference. First operand 2477 states and 6676 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:26,717 INFO L93 Difference]: Finished difference Result 4120 states and 10140 transitions. [2020-11-11 15:18:26,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:18:26,718 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:26,724 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:18:26,724 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:18:26,725 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:18:26,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:18:26,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 2527. [2020-11-11 15:18:26,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 2.702296120348377) internal successors, (6826), 2526 states have internal predecessors, (6826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 6826 transitions. [2020-11-11 15:18:26,771 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 6826 transitions. Word has length 126 [2020-11-11 15:18:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:26,771 INFO L481 AbstractCegarLoop]: Abstraction has 2527 states and 6826 transitions. [2020-11-11 15:18:26,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 6826 transitions. [2020-11-11 15:18:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:26,773 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:26,774 INFO L494 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] [2020-11-11 15:18:26,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-11-11 15:18:26,974 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:26,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:26,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1172892838, now seen corresponding path program 191 times [2020-11-11 15:18:26,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:26,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786492489] [2020-11-11 15:18:26,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:27,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786492489] [2020-11-11 15:18:27,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15279764] [2020-11-11 15:18:27,671 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 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 [2020-11-11 15:18:27,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:18:27,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:27,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:27,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:27,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:27,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:27,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:27,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:27,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958765434] [2020-11-11 15:18:27,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:27,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:27,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:27,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:27,892 INFO L87 Difference]: Start difference. First operand 2527 states and 6826 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:29,717 INFO L93 Difference]: Finished difference Result 4120 states and 10190 transitions. [2020-11-11 15:18:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:18:29,719 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:29,724 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:18:29,725 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:18:29,725 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:18:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:18:29,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 2577. [2020-11-11 15:18:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 2.7080745341614905) internal successors, (6976), 2576 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 6976 transitions. [2020-11-11 15:18:29,767 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 6976 transitions. Word has length 126 [2020-11-11 15:18:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:29,768 INFO L481 AbstractCegarLoop]: Abstraction has 2577 states and 6976 transitions. [2020-11-11 15:18:29,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 6976 transitions. [2020-11-11 15:18:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:29,770 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:29,770 INFO L494 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] [2020-11-11 15:18:29,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-11-11 15:18:29,971 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:29,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1098591448, now seen corresponding path program 192 times [2020-11-11 15:18:29,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:29,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357781941] [2020-11-11 15:18:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:30,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357781941] [2020-11-11 15:18:30,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303300147] [2020-11-11 15:18:30,746 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 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 [2020-11-11 15:18:30,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:18:30,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:30,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:30,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:30,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:30,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:30,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:30,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812383902] [2020-11-11 15:18:30,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:30,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:30,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:30,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:30,915 INFO L87 Difference]: Start difference. First operand 2577 states and 6976 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:32,861 INFO L93 Difference]: Finished difference Result 4120 states and 10240 transitions. [2020-11-11 15:18:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:18:32,863 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:32,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:32,869 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:18:32,869 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:18:32,870 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:18:32,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:18:32,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 2627. [2020-11-11 15:18:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.713632901751714) internal successors, (7126), 2626 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:32,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 7126 transitions. [2020-11-11 15:18:32,921 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 7126 transitions. Word has length 126 [2020-11-11 15:18:32,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:32,921 INFO L481 AbstractCegarLoop]: Abstraction has 2627 states and 7126 transitions. [2020-11-11 15:18:32,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:32,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 7126 transitions. [2020-11-11 15:18:32,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:32,925 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:32,925 INFO L494 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] [2020-11-11 15:18:33,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-11-11 15:18:33,126 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:33,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:33,127 INFO L82 PathProgramCache]: Analyzing trace with hash -462573544, now seen corresponding path program 193 times [2020-11-11 15:18:33,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:33,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127544854] [2020-11-11 15:18:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:33,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127544854] [2020-11-11 15:18:33,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575934870] [2020-11-11 15:18:33,840 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 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 [2020-11-11 15:18:33,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:33,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:33,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:33,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:34,014 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:34,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:34,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:34,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449057646] [2020-11-11 15:18:34,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:34,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:34,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:34,036 INFO L87 Difference]: Start difference. First operand 2627 states and 7126 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:36,258 INFO L93 Difference]: Finished difference Result 4120 states and 10290 transitions. [2020-11-11 15:18:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:18:36,260 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:36,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:36,266 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:18:36,266 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:18:36,267 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:18:36,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:18:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 2677. [2020-11-11 15:18:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2676 states have (on average 2.71898355754858) internal successors, (7276), 2676 states have internal predecessors, (7276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:36,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 7276 transitions. [2020-11-11 15:18:36,318 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 7276 transitions. Word has length 126 [2020-11-11 15:18:36,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:36,318 INFO L481 AbstractCegarLoop]: Abstraction has 2677 states and 7276 transitions. [2020-11-11 15:18:36,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 7276 transitions. [2020-11-11 15:18:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:36,322 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:36,322 INFO L494 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] [2020-11-11 15:18:36,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:36,523 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:36,524 INFO L82 PathProgramCache]: Analyzing trace with hash -352044698, now seen corresponding path program 194 times [2020-11-11 15:18:36,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:36,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849262099] [2020-11-11 15:18:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:37,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849262099] [2020-11-11 15:18:37,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007175304] [2020-11-11 15:18:37,235 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 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 [2020-11-11 15:18:37,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:18:37,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:37,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:37,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:37,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:37,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:37,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:37,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651932450] [2020-11-11 15:18:37,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:37,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:37,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:37,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:37,394 INFO L87 Difference]: Start difference. First operand 2677 states and 7276 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:39,406 INFO L93 Difference]: Finished difference Result 4120 states and 10340 transitions. [2020-11-11 15:18:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:18:39,408 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:39,415 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:18:39,415 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:18:39,416 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:18:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:18:39,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 2727. [2020-11-11 15:18:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 2.7241379310344827) internal successors, (7426), 2726 states have internal predecessors, (7426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 7426 transitions. [2020-11-11 15:18:39,504 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 7426 transitions. Word has length 126 [2020-11-11 15:18:39,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:39,504 INFO L481 AbstractCegarLoop]: Abstraction has 2727 states and 7426 transitions. [2020-11-11 15:18:39,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:39,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 7426 transitions. [2020-11-11 15:18:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:39,508 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:39,508 INFO L494 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] [2020-11-11 15:18:39,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-11-11 15:18:39,709 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:39,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:39,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1711243862, now seen corresponding path program 195 times [2020-11-11 15:18:39,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:39,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798240725] [2020-11-11 15:18:39,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:40,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798240725] [2020-11-11 15:18:40,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706942093] [2020-11-11 15:18:40,482 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 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 [2020-11-11 15:18:40,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:18:40,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:40,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-11 15:18:40,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:40,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:40,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:40,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:40,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697066644] [2020-11-11 15:18:40,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:40,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:40,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:40,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:40,745 INFO L87 Difference]: Start difference. First operand 2727 states and 7426 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:42,948 INFO L93 Difference]: Finished difference Result 4120 states and 10390 transitions. [2020-11-11 15:18:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:18:42,949 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:42,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:42,955 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:18:42,955 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:18:42,956 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=734, Invalid=2572, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:18:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:18:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 2777. [2020-11-11 15:18:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2776 states have (on average 2.729106628242075) internal successors, (7576), 2776 states have internal predecessors, (7576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 7576 transitions. [2020-11-11 15:18:43,003 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 7576 transitions. Word has length 126 [2020-11-11 15:18:43,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:43,004 INFO L481 AbstractCegarLoop]: Abstraction has 2777 states and 7576 transitions. [2020-11-11 15:18:43,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 7576 transitions. [2020-11-11 15:18:43,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:43,006 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:43,006 INFO L494 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] [2020-11-11 15:18:43,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-11-11 15:18:43,208 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:43,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:43,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1273279780, now seen corresponding path program 196 times [2020-11-11 15:18:43,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:43,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263884637] [2020-11-11 15:18:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:43,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263884637] [2020-11-11 15:18:43,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610361898] [2020-11-11 15:18:43,949 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 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 [2020-11-11 15:18:44,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:18:44,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:44,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:18:44,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:44,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:44,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:44,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:44,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814126246] [2020-11-11 15:18:44,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:44,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:44,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:44,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:44,105 INFO L87 Difference]: Start difference. First operand 2777 states and 7576 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:46,160 INFO L93 Difference]: Finished difference Result 4120 states and 10440 transitions. [2020-11-11 15:18:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:18:46,162 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:46,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:46,169 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:18:46,169 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:18:46,170 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:18:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:18:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 2827. [2020-11-11 15:18:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 2.7338995046001417) internal successors, (7726), 2826 states have internal predecessors, (7726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 7726 transitions. [2020-11-11 15:18:46,231 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 7726 transitions. Word has length 126 [2020-11-11 15:18:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:46,231 INFO L481 AbstractCegarLoop]: Abstraction has 2827 states and 7726 transitions. [2020-11-11 15:18:46,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 7726 transitions. [2020-11-11 15:18:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:46,235 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:46,235 INFO L494 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] [2020-11-11 15:18:46,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:46,436 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:46,438 INFO L82 PathProgramCache]: Analyzing trace with hash -272012780, now seen corresponding path program 197 times [2020-11-11 15:18:46,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:46,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727387799] [2020-11-11 15:18:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:47,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727387799] [2020-11-11 15:18:47,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392046086] [2020-11-11 15:18:47,190 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 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 [2020-11-11 15:18:47,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:18:47,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:47,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:47,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:47,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:47,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:47,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:47,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:47,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600043882] [2020-11-11 15:18:47,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:47,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:47,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:47,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:47,414 INFO L87 Difference]: Start difference. First operand 2827 states and 7726 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:49,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:49,905 INFO L93 Difference]: Finished difference Result 4120 states and 10490 transitions. [2020-11-11 15:18:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:18:49,907 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:49,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:49,911 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:18:49,911 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:18:49,912 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:18:49,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:18:49,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 2877. [2020-11-11 15:18:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2876 states have (on average 2.7385257301808066) internal successors, (7876), 2876 states have internal predecessors, (7876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 7876 transitions. [2020-11-11 15:18:49,958 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 7876 transitions. Word has length 126 [2020-11-11 15:18:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:49,959 INFO L481 AbstractCegarLoop]: Abstraction has 2877 states and 7876 transitions. [2020-11-11 15:18:49,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 7876 transitions. [2020-11-11 15:18:49,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:49,961 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:49,961 INFO L494 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] [2020-11-11 15:18:50,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:50,162 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:50,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:50,163 INFO L82 PathProgramCache]: Analyzing trace with hash -839178654, now seen corresponding path program 198 times [2020-11-11 15:18:50,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:50,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741699526] [2020-11-11 15:18:50,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:50,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741699526] [2020-11-11 15:18:50,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147639759] [2020-11-11 15:18:50,877 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 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 [2020-11-11 15:18:51,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:18:51,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:51,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:51,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:51,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:51,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:51,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:51,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140009363] [2020-11-11 15:18:51,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:51,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:51,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:51,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:51,076 INFO L87 Difference]: Start difference. First operand 2877 states and 7876 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:53,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:53,264 INFO L93 Difference]: Finished difference Result 4120 states and 10540 transitions. [2020-11-11 15:18:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:18:53,266 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:53,274 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:18:53,274 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:18:53,274 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:18:53,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:18:53,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 2927. [2020-11-11 15:18:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 2.742993848257006) internal successors, (8026), 2926 states have internal predecessors, (8026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 8026 transitions. [2020-11-11 15:18:53,335 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 8026 transitions. Word has length 126 [2020-11-11 15:18:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:53,335 INFO L481 AbstractCegarLoop]: Abstraction has 2927 states and 8026 transitions. [2020-11-11 15:18:53,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 8026 transitions. [2020-11-11 15:18:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:53,339 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:53,339 INFO L494 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] [2020-11-11 15:18:53,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:53,540 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:53,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:53,541 INFO L82 PathProgramCache]: Analyzing trace with hash -10467502, now seen corresponding path program 199 times [2020-11-11 15:18:53,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:53,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626891400] [2020-11-11 15:18:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:54,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626891400] [2020-11-11 15:18:54,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674857117] [2020-11-11 15:18:54,247 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 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 [2020-11-11 15:18:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:54,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:54,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:54,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:54,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:54,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:54,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:54,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035229397] [2020-11-11 15:18:54,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:54,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:54,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:54,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:54,456 INFO L87 Difference]: Start difference. First operand 2927 states and 8026 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:57,392 INFO L93 Difference]: Finished difference Result 4120 states and 10590 transitions. [2020-11-11 15:18:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:18:57,394 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 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 126 [2020-11-11 15:18:57,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:57,401 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:18:57,401 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:18:57,402 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:18:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:18:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 2977. [2020-11-11 15:18:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 2.747311827956989) internal successors, (8176), 2976 states have internal predecessors, (8176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 8176 transitions. [2020-11-11 15:18:57,462 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 8176 transitions. Word has length 126 [2020-11-11 15:18:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:57,463 INFO L481 AbstractCegarLoop]: Abstraction has 2977 states and 8176 transitions. [2020-11-11 15:18:57,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:57,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 8176 transitions. [2020-11-11 15:18:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:57,467 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:57,467 INFO L494 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] [2020-11-11 15:18:57,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:57,668 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:57,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1733006048, now seen corresponding path program 200 times [2020-11-11 15:18:57,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:57,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121932058] [2020-11-11 15:18:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:58,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121932058] [2020-11-11 15:18:58,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279353356] [2020-11-11 15:18:58,335 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 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 [2020-11-11 15:18:58,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:18:58,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:58,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:58,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:58,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:58,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:58,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:58,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922294891] [2020-11-11 15:18:58,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:58,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:58,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:58,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:58,496 INFO L87 Difference]: Start difference. First operand 2977 states and 8176 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:01,008 INFO L93 Difference]: Finished difference Result 4120 states and 10640 transitions. [2020-11-11 15:19:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:19:01,010 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2020-11-11 15:19:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:01,017 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:19:01,018 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:19:01,018 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:19:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:19:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3027. [2020-11-11 15:19:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 3026 states have (on average 2.751487111698612) internal successors, (8326), 3026 states have internal predecessors, (8326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 8326 transitions. [2020-11-11 15:19:01,084 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 8326 transitions. Word has length 126 [2020-11-11 15:19:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:01,085 INFO L481 AbstractCegarLoop]: Abstraction has 3027 states and 8326 transitions. [2020-11-11 15:19:01,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:01,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 8326 transitions. [2020-11-11 15:19:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:19:01,089 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:01,089 INFO L494 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] [2020-11-11 15:19:01,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-11-11 15:19:01,290 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:01,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:01,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1022425616, now seen corresponding path program 201 times [2020-11-11 15:19:01,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:01,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658353105] [2020-11-11 15:19:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:01,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658353105] [2020-11-11 15:19:01,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767115257] [2020-11-11 15:19:01,995 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 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 [2020-11-11 15:19:02,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:19:02,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:02,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:19:02,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:02,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:02,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:02,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:19:02,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582076784] [2020-11-11 15:19:02,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:19:02,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:02,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:19:02,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:19:02,223 INFO L87 Difference]: Start difference. First operand 3027 states and 8326 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:05,162 INFO L93 Difference]: Finished difference Result 4120 states and 10690 transitions. [2020-11-11 15:19:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:19:05,164 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 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 126 [2020-11-11 15:19:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:05,169 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:19:05,169 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:19:05,169 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=950, Invalid=3082, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:19:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:19:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3077. [2020-11-11 15:19:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 2.7555266579973994) internal successors, (8476), 3076 states have internal predecessors, (8476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 8476 transitions. [2020-11-11 15:19:05,221 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 8476 transitions. Word has length 126 [2020-11-11 15:19:05,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:05,221 INFO L481 AbstractCegarLoop]: Abstraction has 3077 states and 8476 transitions. [2020-11-11 15:19:05,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:05,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 8476 transitions. [2020-11-11 15:19:05,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:19:05,224 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:05,224 INFO L494 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] [2020-11-11 15:19:05,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-11-11 15:19:05,425 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:05,425 INFO L82 PathProgramCache]: Analyzing trace with hash -334141090, now seen corresponding path program 202 times [2020-11-11 15:19:05,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:05,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571322463] [2020-11-11 15:19:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:06,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571322463] [2020-11-11 15:19:06,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939132415] [2020-11-11 15:19:06,190 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 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 [2020-11-11 15:19:06,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:19:06,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:06,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:19:06,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:06,339 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:06,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:06,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:19:06,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61158339] [2020-11-11 15:19:06,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:19:06,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:19:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:19:06,360 INFO L87 Difference]: Start difference. First operand 3077 states and 8476 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:08,983 INFO L93 Difference]: Finished difference Result 4120 states and 10740 transitions. [2020-11-11 15:19:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:19:08,986 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2020-11-11 15:19:08,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:08,993 INFO L225 Difference]: With dead ends: 4120 [2020-11-11 15:19:08,993 INFO L226 Difference]: Without dead ends: 3850 [2020-11-11 15:19:08,994 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:19:09,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-11-11 15:19:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3127. [2020-11-11 15:19:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3127 states, 3126 states have (on average 2.7594369801663468) internal successors, (8626), 3126 states have internal predecessors, (8626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3127 states to 3127 states and 8626 transitions. [2020-11-11 15:19:09,057 INFO L78 Accepts]: Start accepts. Automaton has 3127 states and 8626 transitions. Word has length 126 [2020-11-11 15:19:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:09,057 INFO L481 AbstractCegarLoop]: Abstraction has 3127 states and 8626 transitions. [2020-11-11 15:19:09,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:09,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3127 states and 8626 transitions. [2020-11-11 15:19:09,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:19:09,061 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:09,061 INFO L494 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] [2020-11-11 15:19:09,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-11-11 15:19:09,262 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:09,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1497391694, now seen corresponding path program 203 times [2020-11-11 15:19:09,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:09,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813078282] [2020-11-11 15:19:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:09,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813078282] [2020-11-11 15:19:09,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061459733] [2020-11-11 15:19:09,963 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 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 [2020-11-11 15:19:10,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:19:10,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:10,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:19:10,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:10,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:10,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:10,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:10,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:19:10,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662931773] [2020-11-11 15:19:10,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:19:10,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:10,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:19:10,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:19:10,203 INFO L87 Difference]: Start difference. First operand 3127 states and 8626 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:13,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:13,612 INFO L93 Difference]: Finished difference Result 4165 states and 10910 transitions. [2020-11-11 15:19:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-11 15:19:13,615 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 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 126 [2020-11-11 15:19:13,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:13,622 INFO L225 Difference]: With dead ends: 4165 [2020-11-11 15:19:13,622 INFO L226 Difference]: Without dead ends: 3895 [2020-11-11 15:19:13,622 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1235, Invalid=3321, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:19:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2020-11-11 15:19:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 3177. [2020-11-11 15:19:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 2.767947103274559) internal successors, (8791), 3176 states have internal predecessors, (8791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 8791 transitions. [2020-11-11 15:19:13,685 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 8791 transitions. Word has length 126 [2020-11-11 15:19:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:13,685 INFO L481 AbstractCegarLoop]: Abstraction has 3177 states and 8791 transitions. [2020-11-11 15:19:13,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 8791 transitions. [2020-11-11 15:19:13,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:19:13,689 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:13,690 INFO L494 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] [2020-11-11 15:19:13,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2020-11-11 15:19:13,891 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:13,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:13,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2126183196, now seen corresponding path program 204 times [2020-11-11 15:19:13,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:13,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055219003] [2020-11-11 15:19:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:14,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055219003] [2020-11-11 15:19:14,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800011408] [2020-11-11 15:19:14,615 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 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 [2020-11-11 15:19:14,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:19:14,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:14,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:14,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:14,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:14,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:14,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:19:14,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786903532] [2020-11-11 15:19:14,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:19:14,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:14,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:19:14,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:19:14,795 INFO L87 Difference]: Start difference. First operand 3177 states and 8791 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:17,566 INFO L93 Difference]: Finished difference Result 5252 states and 14044 transitions. [2020-11-11 15:19:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:19:17,569 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2020-11-11 15:19:17,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:17,578 INFO L225 Difference]: With dead ends: 5252 [2020-11-11 15:19:17,578 INFO L226 Difference]: Without dead ends: 4982 [2020-11-11 15:19:17,579 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:19:17,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2020-11-11 15:19:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 3302. [2020-11-11 15:19:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3302 states, 3301 states have (on average 2.7815813389881856) internal successors, (9182), 3301 states have internal predecessors, (9182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 9182 transitions. [2020-11-11 15:19:17,648 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 9182 transitions. Word has length 126 [2020-11-11 15:19:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:17,648 INFO L481 AbstractCegarLoop]: Abstraction has 3302 states and 9182 transitions. [2020-11-11 15:19:17,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 9182 transitions. [2020-11-11 15:19:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:19:17,652 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:17,652 INFO L494 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] [2020-11-11 15:19:17,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-11-11 15:19:17,853 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:17,854 INFO L82 PathProgramCache]: Analyzing trace with hash -457576146, now seen corresponding path program 205 times [2020-11-11 15:19:17,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:17,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727592277] [2020-11-11 15:19:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:18,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727592277] [2020-11-11 15:19:18,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421654025] [2020-11-11 15:19:18,578 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 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 [2020-11-11 15:19:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:18,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:19:18,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:18,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:18,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:18,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:18,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:19:18,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921265531] [2020-11-11 15:19:18,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:19:18,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:18,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:19:18,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:19:18,796 INFO L87 Difference]: Start difference. First operand 3302 states and 9182 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:22,299 INFO L93 Difference]: Finished difference Result 4291 states and 11400 transitions. [2020-11-11 15:19:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 15:19:22,302 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 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 126 [2020-11-11 15:19:22,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:22,309 INFO L225 Difference]: With dead ends: 4291 [2020-11-11 15:19:22,310 INFO L226 Difference]: Without dead ends: 3880 [2020-11-11 15:19:22,311 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1379, Invalid=3451, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:19:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2020-11-11 15:19:22,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 2352. [2020-11-11 15:19:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.690769885155253) internal successors, (6326), 2351 states have internal predecessors, (6326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6326 transitions. [2020-11-11 15:19:22,363 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6326 transitions. Word has length 126 [2020-11-11 15:19:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:22,363 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 6326 transitions. [2020-11-11 15:19:22,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6326 transitions. [2020-11-11 15:19:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:22,366 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:22,366 INFO L494 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] [2020-11-11 15:19:22,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:22,567 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:22,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1003443911, now seen corresponding path program 206 times [2020-11-11 15:19:22,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:22,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782225298] [2020-11-11 15:19:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:23,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782225298] [2020-11-11 15:19:23,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178190341] [2020-11-11 15:19:23,526 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:23,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:19:23,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:23,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:23,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:23,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:23,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:23,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:19:23,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694814461] [2020-11-11 15:19:23,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:19:23,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:23,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:19:23,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:19:23,748 INFO L87 Difference]: Start difference. First operand 2352 states and 6326 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:25,498 INFO L93 Difference]: Finished difference Result 3745 states and 9290 transitions. [2020-11-11 15:19:25,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:19:25,500 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 131 [2020-11-11 15:19:25,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:25,505 INFO L225 Difference]: With dead ends: 3745 [2020-11-11 15:19:25,505 INFO L226 Difference]: Without dead ends: 3475 [2020-11-11 15:19:25,506 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=722, Invalid=2034, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:19:25,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2020-11-11 15:19:25,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 2402. [2020-11-11 15:19:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.6972094960433153) internal successors, (6476), 2401 states have internal predecessors, (6476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:25,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6476 transitions. [2020-11-11 15:19:25,549 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6476 transitions. Word has length 131 [2020-11-11 15:19:25,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:25,550 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 6476 transitions. [2020-11-11 15:19:25,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:25,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6476 transitions. [2020-11-11 15:19:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:25,553 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:25,553 INFO L494 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] [2020-11-11 15:19:25,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-11-11 15:19:25,754 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:25,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:25,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1039470665, now seen corresponding path program 207 times [2020-11-11 15:19:25,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:25,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381787735] [2020-11-11 15:19:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:26,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381787735] [2020-11-11 15:19:26,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664195329] [2020-11-11 15:19:26,659 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:26,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:19:26,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:26,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:26,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:26,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:26,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:26,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:26,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:19:26,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409718086] [2020-11-11 15:19:26,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:19:26,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:26,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:19:26,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:19:26,985 INFO L87 Difference]: Start difference. First operand 2402 states and 6476 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:19:28,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:28,994 INFO L93 Difference]: Finished difference Result 4240 states and 10330 transitions. [2020-11-11 15:19:28,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:19:28,995 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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 131 [2020-11-11 15:19:28,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:29,000 INFO L225 Difference]: With dead ends: 4240 [2020-11-11 15:19:29,001 INFO L226 Difference]: Without dead ends: 3970 [2020-11-11 15:19:29,001 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=780, Invalid=2300, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:19:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2020-11-11 15:19:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 2452. [2020-11-11 15:19:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 2.7033863729090166) internal successors, (6626), 2451 states have internal predecessors, (6626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 6626 transitions. [2020-11-11 15:19:29,041 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 6626 transitions. Word has length 131 [2020-11-11 15:19:29,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:29,041 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 6626 transitions. [2020-11-11 15:19:29,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:19:29,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 6626 transitions. [2020-11-11 15:19:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:29,044 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:29,044 INFO L494 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] [2020-11-11 15:19:29,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:29,245 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:29,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:29,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1875329915, now seen corresponding path program 208 times [2020-11-11 15:19:29,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:29,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043838017] [2020-11-11 15:19:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:30,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043838017] [2020-11-11 15:19:30,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285311457] [2020-11-11 15:19:30,199 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:30,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:19:30,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:19:30,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:30,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:30,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:30,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:19:30,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534853529] [2020-11-11 15:19:30,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:19:30,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:30,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:19:30,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:19:30,423 INFO L87 Difference]: Start difference. First operand 2452 states and 6626 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:32,322 INFO L93 Difference]: Finished difference Result 4245 states and 10390 transitions. [2020-11-11 15:19:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:19:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 131 [2020-11-11 15:19:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:32,331 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:32,332 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:32,332 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=776, Invalid=2304, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:19:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:32,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2502. [2020-11-11 15:19:32,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.7093162734906038) internal successors, (6776), 2501 states have internal predecessors, (6776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6776 transitions. [2020-11-11 15:19:32,384 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6776 transitions. Word has length 131 [2020-11-11 15:19:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:32,384 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6776 transitions. [2020-11-11 15:19:32,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6776 transitions. [2020-11-11 15:19:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:32,388 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:32,388 INFO L494 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] [2020-11-11 15:19:32,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:32,589 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:32,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:32,590 INFO L82 PathProgramCache]: Analyzing trace with hash -192822923, now seen corresponding path program 209 times [2020-11-11 15:19:32,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:32,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809728450] [2020-11-11 15:19:32,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:33,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809728450] [2020-11-11 15:19:33,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271236947] [2020-11-11 15:19:33,709 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:33,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:19:33,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:33,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:33,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:33,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:33,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:33,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:33,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:19:33,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550413989] [2020-11-11 15:19:33,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:19:33,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:33,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:19:33,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:19:33,987 INFO L87 Difference]: Start difference. First operand 2502 states and 6776 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:19:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:36,133 INFO L93 Difference]: Finished difference Result 4245 states and 10440 transitions. [2020-11-11 15:19:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:19:36,135 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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 131 [2020-11-11 15:19:36,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:36,141 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:36,142 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:36,143 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=799, Invalid=2507, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:19:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:36,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2552. [2020-11-11 15:19:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.715013720109761) internal successors, (6926), 2551 states have internal predecessors, (6926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:36,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6926 transitions. [2020-11-11 15:19:36,197 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6926 transitions. Word has length 131 [2020-11-11 15:19:36,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:36,197 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 6926 transitions. [2020-11-11 15:19:36,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:19:36,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6926 transitions. [2020-11-11 15:19:36,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:36,201 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:36,201 INFO L494 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] [2020-11-11 15:19:36,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:36,402 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:36,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:36,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2045470781, now seen corresponding path program 210 times [2020-11-11 15:19:36,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:36,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667315728] [2020-11-11 15:19:36,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:37,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667315728] [2020-11-11 15:19:37,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902340620] [2020-11-11 15:19:37,341 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:37,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:19:37,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:37,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:37,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:37,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:37,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:37,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:19:37,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120682865] [2020-11-11 15:19:37,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:19:37,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:37,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:19:37,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:19:37,591 INFO L87 Difference]: Start difference. First operand 2552 states and 6926 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:39,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:39,650 INFO L93 Difference]: Finished difference Result 4245 states and 10490 transitions. [2020-11-11 15:19:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:19:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 131 [2020-11-11 15:19:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:39,659 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:39,659 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:39,660 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=809, Invalid=2497, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:19:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2602. [2020-11-11 15:19:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2601 states have (on average 2.720492118415994) internal successors, (7076), 2601 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:39,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 7076 transitions. [2020-11-11 15:19:39,717 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 7076 transitions. Word has length 131 [2020-11-11 15:19:39,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:39,717 INFO L481 AbstractCegarLoop]: Abstraction has 2602 states and 7076 transitions. [2020-11-11 15:19:39,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:39,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 7076 transitions. [2020-11-11 15:19:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:39,721 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:39,721 INFO L494 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] [2020-11-11 15:19:39,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-11-11 15:19:39,922 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:39,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:39,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1979578189, now seen corresponding path program 211 times [2020-11-11 15:19:39,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:39,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475319539] [2020-11-11 15:19:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:40,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475319539] [2020-11-11 15:19:40,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628099244] [2020-11-11 15:19:40,961 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:41,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:41,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:41,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:41,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:41,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:41,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:19:41,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599903695] [2020-11-11 15:19:41,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:19:41,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:41,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:19:41,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:19:41,239 INFO L87 Difference]: Start difference. First operand 2602 states and 7076 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:19:43,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:43,654 INFO L93 Difference]: Finished difference Result 4245 states and 10540 transitions. [2020-11-11 15:19:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:19:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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 131 [2020-11-11 15:19:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:43,665 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:43,665 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:43,666 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=834, Invalid=2706, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:19:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2652. [2020-11-11 15:19:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.725763862693323) internal successors, (7226), 2651 states have internal predecessors, (7226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 7226 transitions. [2020-11-11 15:19:43,726 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 7226 transitions. Word has length 131 [2020-11-11 15:19:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:43,726 INFO L481 AbstractCegarLoop]: Abstraction has 2652 states and 7226 transitions. [2020-11-11 15:19:43,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:19:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 7226 transitions. [2020-11-11 15:19:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:43,729 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:43,729 INFO L494 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] [2020-11-11 15:19:43,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-11-11 15:19:43,930 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:43,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:43,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276799, now seen corresponding path program 212 times [2020-11-11 15:19:43,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:43,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401133771] [2020-11-11 15:19:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:44,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401133771] [2020-11-11 15:19:44,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323699622] [2020-11-11 15:19:44,826 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:44,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:19:44,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:44,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:44,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:45,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:45,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:45,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:19:45,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985724423] [2020-11-11 15:19:45,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:19:45,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:45,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:19:45,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:19:45,073 INFO L87 Difference]: Start difference. First operand 2652 states and 7226 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:47,260 INFO L93 Difference]: Finished difference Result 4245 states and 10590 transitions. [2020-11-11 15:19:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:19:47,261 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 131 [2020-11-11 15:19:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:47,268 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:47,269 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:47,269 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=858, Invalid=2682, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:19:47,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2702. [2020-11-11 15:19:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 2.7308404294705664) internal successors, (7376), 2701 states have internal predecessors, (7376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 7376 transitions. [2020-11-11 15:19:47,329 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 7376 transitions. Word has length 131 [2020-11-11 15:19:47,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:47,329 INFO L481 AbstractCegarLoop]: Abstraction has 2702 states and 7376 transitions. [2020-11-11 15:19:47,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:47,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 7376 transitions. [2020-11-11 15:19:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:47,332 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:47,332 INFO L494 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] [2020-11-11 15:19:47,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-11-11 15:19:47,533 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:47,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:47,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1269258895, now seen corresponding path program 213 times [2020-11-11 15:19:47,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:47,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227725582] [2020-11-11 15:19:47,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:48,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227725582] [2020-11-11 15:19:48,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573126460] [2020-11-11 15:19:48,438 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:48,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:19:48,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:48,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-11 15:19:48,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:48,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:48,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:48,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:19:48,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096171032] [2020-11-11 15:19:48,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:19:48,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:48,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:19:48,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:19:48,776 INFO L87 Difference]: Start difference. First operand 2702 states and 7376 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:19:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:51,219 INFO L93 Difference]: Finished difference Result 4245 states and 10640 transitions. [2020-11-11 15:19:51,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:19:51,221 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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 131 [2020-11-11 15:19:51,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:51,229 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:51,230 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:51,230 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=864, Invalid=2918, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:19:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2752. [2020-11-11 15:19:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 2.7357324609233005) internal successors, (7526), 2751 states have internal predecessors, (7526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 7526 transitions. [2020-11-11 15:19:51,296 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 7526 transitions. Word has length 131 [2020-11-11 15:19:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:51,297 INFO L481 AbstractCegarLoop]: Abstraction has 2752 states and 7526 transitions. [2020-11-11 15:19:51,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:19:51,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 7526 transitions. [2020-11-11 15:19:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:51,300 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:51,300 INFO L494 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] [2020-11-11 15:19:51,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-11-11 15:19:51,501 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:51,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:51,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1158730049, now seen corresponding path program 214 times [2020-11-11 15:19:51,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:51,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067379866] [2020-11-11 15:19:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:52,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067379866] [2020-11-11 15:19:52,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52762729] [2020-11-11 15:19:52,408 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:52,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:19:52,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:52,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:19:52,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:52,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:52,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:52,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:19:52,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677975011] [2020-11-11 15:19:52,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:19:52,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:52,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:19:52,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:19:52,633 INFO L87 Difference]: Start difference. First operand 2752 states and 7526 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:55,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:55,102 INFO L93 Difference]: Finished difference Result 4245 states and 10690 transitions. [2020-11-11 15:19:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:19:55,103 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 131 [2020-11-11 15:19:55,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:55,111 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:55,111 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:55,111 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=923, Invalid=2859, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:19:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2802. [2020-11-11 15:19:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 2.740449839343092) internal successors, (7676), 2801 states have internal predecessors, (7676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:55,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 7676 transitions. [2020-11-11 15:19:55,171 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 7676 transitions. Word has length 131 [2020-11-11 15:19:55,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:55,171 INFO L481 AbstractCegarLoop]: Abstraction has 2802 states and 7676 transitions. [2020-11-11 15:19:55,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 7676 transitions. [2020-11-11 15:19:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:55,174 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:55,174 INFO L494 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] [2020-11-11 15:19:55,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-11-11 15:19:55,375 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:55,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash 904558511, now seen corresponding path program 215 times [2020-11-11 15:19:55,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:55,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821400114] [2020-11-11 15:19:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:56,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821400114] [2020-11-11 15:19:56,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377095551] [2020-11-11 15:19:56,320 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:56,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:19:56,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:56,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:56,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:56,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:56,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:56,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:56,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:19:56,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064876693] [2020-11-11 15:19:56,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:19:56,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:56,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:19:56,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:19:56,605 INFO L87 Difference]: Start difference. First operand 2802 states and 7676 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:19:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:59,385 INFO L93 Difference]: Finished difference Result 4245 states and 10740 transitions. [2020-11-11 15:19:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:19:59,388 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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 131 [2020-11-11 15:19:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:59,395 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:59,396 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:59,396 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=952, Invalid=3080, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:19:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2852. [2020-11-11 15:19:59,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 2.7450017537706066) internal successors, (7826), 2851 states have internal predecessors, (7826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 7826 transitions. [2020-11-11 15:19:59,456 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 7826 transitions. Word has length 131 [2020-11-11 15:19:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:59,457 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 7826 transitions. [2020-11-11 15:19:59,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:19:59,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 7826 transitions. [2020-11-11 15:19:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:59,460 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:59,461 INFO L494 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] [2020-11-11 15:19:59,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:59,662 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:59,663 INFO L82 PathProgramCache]: Analyzing trace with hash 466594429, now seen corresponding path program 216 times [2020-11-11 15:19:59,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:59,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897017109] [2020-11-11 15:19:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:00,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897017109] [2020-11-11 15:20:00,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226093867] [2020-11-11 15:20:00,485 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:00,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:20:00,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:00,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:20:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:00,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:00,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:00,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:20:00,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946425553] [2020-11-11 15:20:00,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:20:00,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:00,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:20:00,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:20:00,732 INFO L87 Difference]: Start difference. First operand 2852 states and 7826 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:03,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:03,427 INFO L93 Difference]: Finished difference Result 4245 states and 10790 transitions. [2020-11-11 15:20:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:20:03,429 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 131 [2020-11-11 15:20:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:03,436 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:03,436 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:03,437 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1004, Invalid=3028, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:20:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2902. [2020-11-11 15:20:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 2.7493967597380213) internal successors, (7976), 2901 states have internal predecessors, (7976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 7976 transitions. [2020-11-11 15:20:03,500 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 7976 transitions. Word has length 131 [2020-11-11 15:20:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:03,501 INFO L481 AbstractCegarLoop]: Abstraction has 2902 states and 7976 transitions. [2020-11-11 15:20:03,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 7976 transitions. [2020-11-11 15:20:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:03,505 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:03,505 INFO L494 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] [2020-11-11 15:20:03,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-11-11 15:20:03,706 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:03,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:03,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1078698131, now seen corresponding path program 217 times [2020-11-11 15:20:03,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:03,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096966351] [2020-11-11 15:20:03,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:04,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096966351] [2020-11-11 15:20:04,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560589251] [2020-11-11 15:20:04,581 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:04,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:20:04,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:04,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:20:04,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:04,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:04,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:20:04,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676631157] [2020-11-11 15:20:04,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:20:04,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:04,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:20:04,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:20:04,873 INFO L87 Difference]: Start difference. First operand 2902 states and 7976 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:20:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:08,090 INFO L93 Difference]: Finished difference Result 4245 states and 10840 transitions. [2020-11-11 15:20:08,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:20:08,092 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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 131 [2020-11-11 15:20:08,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:08,099 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:08,099 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:08,100 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1035, Invalid=3255, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:20:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:08,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2952. [2020-11-11 15:20:08,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 2.753642832937987) internal successors, (8126), 2951 states have internal predecessors, (8126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 8126 transitions. [2020-11-11 15:20:08,161 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 8126 transitions. Word has length 131 [2020-11-11 15:20:08,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:08,162 INFO L481 AbstractCegarLoop]: Abstraction has 2952 states and 8126 transitions. [2020-11-11 15:20:08,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:20:08,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 8126 transitions. [2020-11-11 15:20:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:08,166 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:08,166 INFO L494 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] [2020-11-11 15:20:08,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:08,367 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:08,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1645864005, now seen corresponding path program 218 times [2020-11-11 15:20:08,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:08,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069968394] [2020-11-11 15:20:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:09,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069968394] [2020-11-11 15:20:09,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028097397] [2020-11-11 15:20:09,433 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:09,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:20:09,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:09,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:20:09,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:09,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:09,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:09,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:20:09,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35790078] [2020-11-11 15:20:09,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:20:09,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:09,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:20:09,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:20:09,732 INFO L87 Difference]: Start difference. First operand 2952 states and 8126 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:12,692 INFO L93 Difference]: Finished difference Result 4245 states and 10890 transitions. [2020-11-11 15:20:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:20:12,695 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 131 [2020-11-11 15:20:12,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:12,702 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:12,702 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:12,703 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1101, Invalid=3189, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:20:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 3002. [2020-11-11 15:20:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 2.757747417527491) internal successors, (8276), 3001 states have internal predecessors, (8276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 8276 transitions. [2020-11-11 15:20:12,769 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 8276 transitions. Word has length 131 [2020-11-11 15:20:12,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:12,769 INFO L481 AbstractCegarLoop]: Abstraction has 3002 states and 8276 transitions. [2020-11-11 15:20:12,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:12,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 8276 transitions. [2020-11-11 15:20:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:12,772 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:12,773 INFO L494 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] [2020-11-11 15:20:12,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-11-11 15:20:12,973 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:12,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:12,974 INFO L82 PathProgramCache]: Analyzing trace with hash -817152853, now seen corresponding path program 219 times [2020-11-11 15:20:12,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:12,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261544968] [2020-11-11 15:20:12,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:13,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261544968] [2020-11-11 15:20:13,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658244015] [2020-11-11 15:20:13,828 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:13,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:20:13,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:13,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-11 15:20:13,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:14,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:14,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:14,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:20:14,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828633721] [2020-11-11 15:20:14,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:20:14,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:14,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:20:14,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:20:14,132 INFO L87 Difference]: Start difference. First operand 3002 states and 8276 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:20:17,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:17,676 INFO L93 Difference]: Finished difference Result 4245 states and 10940 transitions. [2020-11-11 15:20:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:20:17,678 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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 131 [2020-11-11 15:20:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:17,684 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:17,684 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:17,685 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1068, Invalid=3488, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:20:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:17,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 3052. [2020-11-11 15:20:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3051 states have (on average 2.7617174696820714) internal successors, (8426), 3051 states have internal predecessors, (8426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:17,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 8426 transitions. [2020-11-11 15:20:17,751 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 8426 transitions. Word has length 131 [2020-11-11 15:20:17,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:17,751 INFO L481 AbstractCegarLoop]: Abstraction has 3052 states and 8426 transitions. [2020-11-11 15:20:17,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:20:17,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 8426 transitions. [2020-11-11 15:20:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:17,755 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:17,756 INFO L494 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] [2020-11-11 15:20:17,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:17,956 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:17,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1755275897, now seen corresponding path program 220 times [2020-11-11 15:20:17,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:17,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002923711] [2020-11-11 15:20:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:18,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002923711] [2020-11-11 15:20:18,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827635457] [2020-11-11 15:20:18,751 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:18,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:20:18,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:18,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:20:18,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:18,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:18,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:18,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:20:18,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977825437] [2020-11-11 15:20:18,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:20:18,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:18,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:20:18,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:20:18,988 INFO L87 Difference]: Start difference. First operand 3052 states and 8426 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:22,016 INFO L93 Difference]: Finished difference Result 4245 states and 10990 transitions. [2020-11-11 15:20:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:20:22,018 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 131 [2020-11-11 15:20:22,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:22,025 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:22,025 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:22,026 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1214, Invalid=3342, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:20:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:22,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 3102. [2020-11-11 15:20:22,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 2.765559496936472) internal successors, (8576), 3101 states have internal predecessors, (8576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 8576 transitions. [2020-11-11 15:20:22,092 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 8576 transitions. Word has length 131 [2020-11-11 15:20:22,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:22,092 INFO L481 AbstractCegarLoop]: Abstraction has 3102 states and 8576 transitions. [2020-11-11 15:20:22,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:22,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 8576 transitions. [2020-11-11 15:20:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:22,095 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:22,095 INFO L494 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] [2020-11-11 15:20:22,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:22,296 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:22,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:22,297 INFO L82 PathProgramCache]: Analyzing trace with hash 215740265, now seen corresponding path program 221 times [2020-11-11 15:20:22,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:22,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461127686] [2020-11-11 15:20:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:23,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461127686] [2020-11-11 15:20:23,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155385159] [2020-11-11 15:20:23,164 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:23,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:20:23,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:23,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:20:23,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:23,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:20:23,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:23,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:23,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:20:23,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944802485] [2020-11-11 15:20:23,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:20:23,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:23,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:20:23,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:20:23,466 INFO L87 Difference]: Start difference. First operand 3102 states and 8576 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:20:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:27,054 INFO L93 Difference]: Finished difference Result 4245 states and 11040 transitions. [2020-11-11 15:20:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-11 15:20:27,057 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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 131 [2020-11-11 15:20:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:27,064 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:27,065 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:27,065 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1249, Invalid=3581, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:20:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 3152. [2020-11-11 15:20:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 3151 states have (on average 2.7692795937797525) internal successors, (8726), 3151 states have internal predecessors, (8726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 8726 transitions. [2020-11-11 15:20:27,128 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 8726 transitions. Word has length 131 [2020-11-11 15:20:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:27,128 INFO L481 AbstractCegarLoop]: Abstraction has 3152 states and 8726 transitions. [2020-11-11 15:20:27,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:20:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 8726 transitions. [2020-11-11 15:20:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:27,133 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:27,133 INFO L494 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] [2020-11-11 15:20:27,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-11-11 15:20:27,334 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:27,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:27,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1140826441, now seen corresponding path program 222 times [2020-11-11 15:20:27,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:27,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407513046] [2020-11-11 15:20:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:28,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407513046] [2020-11-11 15:20:28,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133009183] [2020-11-11 15:20:28,215 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:28,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:20:28,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:28,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:20:28,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:28,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:28,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:28,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:20:28,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476101366] [2020-11-11 15:20:28,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:20:28,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:28,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:20:28,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:20:28,530 INFO L87 Difference]: Start difference. First operand 3152 states and 8726 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:31,798 INFO L93 Difference]: Finished difference Result 4245 states and 11090 transitions. [2020-11-11 15:20:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 15:20:31,800 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 131 [2020-11-11 15:20:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:31,807 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:31,807 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:31,808 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1343, Invalid=3487, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:20:31,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 3202. [2020-11-11 15:20:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3201 states have (on average 2.7728834739144017) internal successors, (8876), 3201 states have internal predecessors, (8876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 8876 transitions. [2020-11-11 15:20:31,879 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 8876 transitions. Word has length 131 [2020-11-11 15:20:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:31,879 INFO L481 AbstractCegarLoop]: Abstraction has 3202 states and 8876 transitions. [2020-11-11 15:20:31,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 8876 transitions. [2020-11-11 15:20:31,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:31,883 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:31,883 INFO L494 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] [2020-11-11 15:20:32,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:32,084 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:32,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:32,085 INFO L82 PathProgramCache]: Analyzing trace with hash 690706343, now seen corresponding path program 223 times [2020-11-11 15:20:32,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:32,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549167308] [2020-11-11 15:20:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:32,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549167308] [2020-11-11 15:20:32,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361160772] [2020-11-11 15:20:32,894 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:32,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:20:32,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:33,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:20:33,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:33,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:33,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:20:33,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696541195] [2020-11-11 15:20:33,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:20:33,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:33,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:20:33,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:20:33,176 INFO L87 Difference]: Start difference. First operand 3202 states and 8876 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:20:37,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:37,189 INFO L93 Difference]: Finished difference Result 4290 states and 11260 transitions. [2020-11-11 15:20:37,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-11 15:20:37,192 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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 131 [2020-11-11 15:20:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:37,200 INFO L225 Difference]: With dead ends: 4290 [2020-11-11 15:20:37,201 INFO L226 Difference]: Without dead ends: 4020 [2020-11-11 15:20:37,201 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1380, Invalid=3732, Unknown=0, NotChecked=0, Total=5112 [2020-11-11 15:20:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4020 states. [2020-11-11 15:20:37,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4020 to 3252. [2020-11-11 15:20:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3252 states, 3251 states have (on average 2.78099046447247) internal successors, (9041), 3251 states have internal predecessors, (9041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3252 states to 3252 states and 9041 transitions. [2020-11-11 15:20:37,268 INFO L78 Accepts]: Start accepts. Automaton has 3252 states and 9041 transitions. Word has length 131 [2020-11-11 15:20:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:37,269 INFO L481 AbstractCegarLoop]: Abstraction has 3252 states and 9041 transitions. [2020-11-11 15:20:37,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 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) [2020-11-11 15:20:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3252 states and 9041 transitions. [2020-11-11 15:20:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:37,273 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:37,273 INFO L494 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] [2020-11-11 15:20:37,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-11-11 15:20:37,475 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:37,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:37,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1319497845, now seen corresponding path program 224 times [2020-11-11 15:20:37,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:37,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468764823] [2020-11-11 15:20:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:38,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468764823] [2020-11-11 15:20:38,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053302416] [2020-11-11 15:20:38,345 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:38,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:20:38,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:38,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:20:38,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:38,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:38,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:38,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:20:38,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490733737] [2020-11-11 15:20:38,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:20:38,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:38,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:20:38,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:20:38,619 INFO L87 Difference]: Start difference. First operand 3252 states and 9041 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:41,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:41,985 INFO L93 Difference]: Finished difference Result 5352 states and 14344 transitions. [2020-11-11 15:20:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-11 15:20:41,987 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 131 [2020-11-11 15:20:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:41,997 INFO L225 Difference]: With dead ends: 5352 [2020-11-11 15:20:41,997 INFO L226 Difference]: Without dead ends: 5082 [2020-11-11 15:20:41,998 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1489, Invalid=3623, Unknown=0, NotChecked=0, Total=5112 [2020-11-11 15:20:42,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2020-11-11 15:20:42,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 3377. [2020-11-11 15:20:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 2.793838862559242) internal successors, (9432), 3376 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 9432 transitions. [2020-11-11 15:20:42,075 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 9432 transitions. Word has length 131 [2020-11-11 15:20:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:42,076 INFO L481 AbstractCegarLoop]: Abstraction has 3377 states and 9432 transitions. [2020-11-11 15:20:42,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 9432 transitions. [2020-11-11 15:20:42,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:42,080 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:42,080 INFO L494 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] [2020-11-11 15:20:42,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-11-11 15:20:42,281 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:42,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1264261497, now seen corresponding path program 225 times [2020-11-11 15:20:42,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:42,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74674394] [2020-11-11 15:20:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:43,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74674394] [2020-11-11 15:20:43,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008476912] [2020-11-11 15:20:43,148 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:43,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:20:43,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:43,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:20:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:43,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:43,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:43,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:20:43,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137610204] [2020-11-11 15:20:43,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:20:43,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:43,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:20:43,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:20:43,455 INFO L87 Difference]: Start difference. First operand 3377 states and 9432 transitions. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:47,319 INFO L93 Difference]: Finished difference Result 4747 states and 12590 transitions. [2020-11-11 15:20:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-11 15:20:47,321 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 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 131 [2020-11-11 15:20:47,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:47,327 INFO L225 Difference]: With dead ends: 4747 [2020-11-11 15:20:47,328 INFO L226 Difference]: Without dead ends: 4220 [2020-11-11 15:20:47,329 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1436, Invalid=4416, Unknown=0, NotChecked=0, Total=5852 [2020-11-11 15:20:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2020-11-11 15:20:47,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 3387. [2020-11-11 15:20:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 2.786769049025399) internal successors, (9436), 3386 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 9436 transitions. [2020-11-11 15:20:47,376 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 9436 transitions. Word has length 131 [2020-11-11 15:20:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:47,377 INFO L481 AbstractCegarLoop]: Abstraction has 3387 states and 9436 transitions. [2020-11-11 15:20:47,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 9436 transitions. [2020-11-11 15:20:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:20:47,379 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:47,379 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:47,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-11-11 15:20:47,580 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:47,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:47,581 INFO L82 PathProgramCache]: Analyzing trace with hash -740261679, now seen corresponding path program 226 times [2020-11-11 15:20:47,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:47,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805105148] [2020-11-11 15:20:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:48,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805105148] [2020-11-11 15:20:48,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361441279] [2020-11-11 15:20:48,489 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:48,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:20:48,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:48,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:20:48,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:48,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:48,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:48,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:48,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-11-11 15:20:48,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891638563] [2020-11-11 15:20:48,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:20:48,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:48,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:20:48,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:20:48,788 INFO L87 Difference]: Start difference. First operand 3387 states and 9436 transitions. Second operand has 30 states, 30 states have (on average 5.2) internal successors, (156), 30 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:50,800 INFO L93 Difference]: Finished difference Result 4705 states and 12520 transitions. [2020-11-11 15:20:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:20:50,801 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.2) internal successors, (156), 30 states have internal predecessors, (156), 0 states have call successors, (0), 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 136 [2020-11-11 15:20:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:50,810 INFO L225 Difference]: With dead ends: 4705 [2020-11-11 15:20:50,810 INFO L226 Difference]: Without dead ends: 4371 [2020-11-11 15:20:50,811 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=885, Invalid=2421, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:20:50,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2020-11-11 15:20:50,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3472. [2020-11-11 15:20:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 3471 states have (on average 2.767502160760588) internal successors, (9606), 3471 states have internal predecessors, (9606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 9606 transitions. [2020-11-11 15:20:50,864 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 9606 transitions. Word has length 136 [2020-11-11 15:20:50,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:50,864 INFO L481 AbstractCegarLoop]: Abstraction has 3472 states and 9606 transitions. [2020-11-11 15:20:50,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.2) internal successors, (156), 30 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:50,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 9606 transitions. [2020-11-11 15:20:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:20:50,869 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:50,869 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:51,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-11-11 15:20:51,069 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash 91885183, now seen corresponding path program 227 times [2020-11-11 15:20:51,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:51,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692280959] [2020-11-11 15:20:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:51,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692280959] [2020-11-11 15:20:51,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328262031] [2020-11-11 15:20:51,922 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:52,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:20:52,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:52,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:20:52,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:52,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:52,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:52,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:20:52,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403989480] [2020-11-11 15:20:52,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:20:52,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:52,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:20:52,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:20:52,104 INFO L87 Difference]: Start difference. First operand 3472 states and 9606 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:53,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:53,880 INFO L93 Difference]: Finished difference Result 5470 states and 13730 transitions. [2020-11-11 15:20:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:20:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2020-11-11 15:20:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:53,892 INFO L225 Difference]: With dead ends: 5470 [2020-11-11 15:20:53,892 INFO L226 Difference]: Without dead ends: 5200 [2020-11-11 15:20:53,893 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=730, Invalid=1922, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:20:53,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5200 states. [2020-11-11 15:20:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5200 to 3487. [2020-11-11 15:20:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:20:53,972 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:20:53,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:53,972 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:20:53,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:53,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:20:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:20:53,977 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:53,977 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:54,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-11-11 15:20:54,178 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:54,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1635828881, now seen corresponding path program 228 times [2020-11-11 15:20:54,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:54,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226076444] [2020-11-11 15:20:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:55,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226076444] [2020-11-11 15:20:55,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313009912] [2020-11-11 15:20:55,383 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:55,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:20:55,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:55,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:20:55,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:55,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:20:55,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:55,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:55,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:20:55,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395377036] [2020-11-11 15:20:55,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:20:55,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:55,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:20:55,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:20:55,667 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:57,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:57,889 INFO L93 Difference]: Finished difference Result 5355 states and 13500 transitions. [2020-11-11 15:20:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:20:57,892 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 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 136 [2020-11-11 15:20:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:57,901 INFO L225 Difference]: With dead ends: 5355 [2020-11-11 15:20:57,902 INFO L226 Difference]: Without dead ends: 5085 [2020-11-11 15:20:57,902 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=801, Invalid=2279, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:20:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5085 states. [2020-11-11 15:20:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 3487. [2020-11-11 15:20:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:20:57,974 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:20:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:57,975 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:20:57,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:20:57,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:20:57,980 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:57,980 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:58,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:58,181 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1726340797, now seen corresponding path program 229 times [2020-11-11 15:20:58,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:58,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637195402] [2020-11-11 15:20:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:59,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637195402] [2020-11-11 15:20:59,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126334040] [2020-11-11 15:20:59,265 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:59,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:20:59,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:59,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:59,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:59,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:20:59,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972762444] [2020-11-11 15:20:59,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:20:59,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:59,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:20:59,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:20:59,428 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:01,523 INFO L93 Difference]: Finished difference Result 5330 states and 13450 transitions. [2020-11-11 15:21:01,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:21:01,525 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:01,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:01,534 INFO L225 Difference]: With dead ends: 5330 [2020-11-11 15:21:01,535 INFO L226 Difference]: Without dead ends: 5060 [2020-11-11 15:21:01,535 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=733, Invalid=2129, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:21:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2020-11-11 15:21:01,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 3487. [2020-11-11 15:21:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:01,610 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:01,610 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:01,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:01,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:01,614 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:01,614 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:01,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:01,815 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:01,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:01,816 INFO L82 PathProgramCache]: Analyzing trace with hash -316573779, now seen corresponding path program 230 times [2020-11-11 15:21:01,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:01,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429389249] [2020-11-11 15:21:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:02,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429389249] [2020-11-11 15:21:02,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164946774] [2020-11-11 15:21:02,916 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:03,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:21:03,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:03,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:03,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:03,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:03,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:03,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:03,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:03,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672516949] [2020-11-11 15:21:03,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:03,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:03,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:03,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:03,138 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:05,896 INFO L93 Difference]: Finished difference Result 5280 states and 13350 transitions. [2020-11-11 15:21:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:21:05,899 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:05,908 INFO L225 Difference]: With dead ends: 5280 [2020-11-11 15:21:05,909 INFO L226 Difference]: Without dead ends: 5010 [2020-11-11 15:21:05,909 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=812, Invalid=2494, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:21:05,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5010 states. [2020-11-11 15:21:05,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5010 to 3487. [2020-11-11 15:21:05,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:05,986 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:05,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:05,986 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:05,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:05,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:05,991 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:05,991 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:06,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:06,192 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1152433029, now seen corresponding path program 231 times [2020-11-11 15:21:06,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:06,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043055726] [2020-11-11 15:21:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:07,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043055726] [2020-11-11 15:21:07,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379909432] [2020-11-11 15:21:07,350 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:07,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:21:07,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:07,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-11 15:21:07,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:07,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:07,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:07,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:07,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171800198] [2020-11-11 15:21:07,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:07,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:07,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:07,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:07,532 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:09,874 INFO L93 Difference]: Finished difference Result 5230 states and 13250 transitions. [2020-11-11 15:21:09,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:21:09,878 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:09,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:09,887 INFO L225 Difference]: With dead ends: 5230 [2020-11-11 15:21:09,887 INFO L226 Difference]: Without dead ends: 4960 [2020-11-11 15:21:09,888 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=752, Invalid=2328, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:21:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4960 states. [2020-11-11 15:21:09,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4960 to 3487. [2020-11-11 15:21:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:09,961 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:09,961 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:09,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:09,966 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:09,966 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:10,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:10,167 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:10,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:10,168 INFO L82 PathProgramCache]: Analyzing trace with hash 530073963, now seen corresponding path program 232 times [2020-11-11 15:21:10,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:10,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568459223] [2020-11-11 15:21:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:11,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568459223] [2020-11-11 15:21:11,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168746832] [2020-11-11 15:21:11,223 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:11,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:21:11,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:11,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:21:11,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:11,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:11,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:11,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:11,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:11,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401558486] [2020-11-11 15:21:11,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:11,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:11,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:11,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:11,496 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:14,361 INFO L93 Difference]: Finished difference Result 5180 states and 13150 transitions. [2020-11-11 15:21:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:21:14,362 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:14,372 INFO L225 Difference]: With dead ends: 5180 [2020-11-11 15:21:14,372 INFO L226 Difference]: Without dead ends: 4910 [2020-11-11 15:21:14,372 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:21:14,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2020-11-11 15:21:14,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 3487. [2020-11-11 15:21:14,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:14,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:14,449 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:14,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:14,449 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:14,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:14,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:14,454 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:14,455 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:14,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:14,655 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:14,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:14,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1322573895, now seen corresponding path program 233 times [2020-11-11 15:21:14,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:14,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274466598] [2020-11-11 15:21:14,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:15,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274466598] [2020-11-11 15:21:15,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952935683] [2020-11-11 15:21:15,737 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:15,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:21:15,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:15,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:15,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:15,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:15,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:15,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:15,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89962349] [2020-11-11 15:21:15,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:15,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:15,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:15,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:15,902 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:18,680 INFO L93 Difference]: Finished difference Result 5130 states and 13050 transitions. [2020-11-11 15:21:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:21:18,683 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:18,692 INFO L225 Difference]: With dead ends: 5130 [2020-11-11 15:21:18,692 INFO L226 Difference]: Without dead ends: 4860 [2020-11-11 15:21:18,693 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=787, Invalid=2519, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:21:18,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4860 states. [2020-11-11 15:21:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4860 to 3487. [2020-11-11 15:21:18,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:18,770 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:18,770 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:18,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:18,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:18,775 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:18,775 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:18,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-11-11 15:21:18,976 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:18,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1256681303, now seen corresponding path program 234 times [2020-11-11 15:21:18,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:18,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968725802] [2020-11-11 15:21:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:20,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968725802] [2020-11-11 15:21:20,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095685793] [2020-11-11 15:21:20,110 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:20,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:21:20,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:20,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:20,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:20,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:20,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:20,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:20,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:20,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100861538] [2020-11-11 15:21:20,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:20,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:20,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:20,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:20,371 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:23,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:23,428 INFO L93 Difference]: Finished difference Result 5080 states and 12950 transitions. [2020-11-11 15:21:23,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:21:23,432 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:23,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:23,441 INFO L225 Difference]: With dead ends: 5080 [2020-11-11 15:21:23,441 INFO L226 Difference]: Without dead ends: 4810 [2020-11-11 15:21:23,442 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=882, Invalid=2900, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:21:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2020-11-11 15:21:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 3487. [2020-11-11 15:21:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:23,517 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:23,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:23,517 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:23,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:23,523 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:23,524 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:23,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-11-11 15:21:23,725 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:23,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1182379913, now seen corresponding path program 235 times [2020-11-11 15:21:23,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:23,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663009097] [2020-11-11 15:21:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:24,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663009097] [2020-11-11 15:21:24,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597067266] [2020-11-11 15:21:24,739 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:24,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:24,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:24,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:24,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:24,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:24,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153240356] [2020-11-11 15:21:24,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:24,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:24,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:24,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:24,914 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:27,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:27,679 INFO L93 Difference]: Finished difference Result 5030 states and 12850 transitions. [2020-11-11 15:21:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:21:27,681 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:27,688 INFO L225 Difference]: With dead ends: 5030 [2020-11-11 15:21:27,688 INFO L226 Difference]: Without dead ends: 4760 [2020-11-11 15:21:27,689 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=838, Invalid=2702, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:21:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2020-11-11 15:21:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 3487. [2020-11-11 15:21:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:27,743 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:27,743 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:27,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:27,747 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:27,747 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:27,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-11-11 15:21:27,948 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:27,949 INFO L82 PathProgramCache]: Analyzing trace with hash -546362009, now seen corresponding path program 236 times [2020-11-11 15:21:27,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:27,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633131692] [2020-11-11 15:21:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:28,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633131692] [2020-11-11 15:21:28,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090596220] [2020-11-11 15:21:28,886 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:28,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:21:28,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:28,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:28,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:29,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:29,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:29,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:29,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:29,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854387752] [2020-11-11 15:21:29,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:29,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:29,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:29,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:29,106 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:32,817 INFO L93 Difference]: Finished difference Result 4980 states and 12750 transitions. [2020-11-11 15:21:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:21:32,820 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:32,829 INFO L225 Difference]: With dead ends: 4980 [2020-11-11 15:21:32,829 INFO L226 Difference]: Without dead ends: 4710 [2020-11-11 15:21:32,830 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=941, Invalid=3091, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:21:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4710 states. [2020-11-11 15:21:32,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4710 to 3487. [2020-11-11 15:21:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:32,905 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:32,906 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:32,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:32,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:32,911 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:32,911 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:33,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:33,111 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:33,112 INFO L82 PathProgramCache]: Analyzing trace with hash -435833163, now seen corresponding path program 237 times [2020-11-11 15:21:33,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:33,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122301904] [2020-11-11 15:21:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:34,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122301904] [2020-11-11 15:21:34,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574337550] [2020-11-11 15:21:34,029 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:34,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:21:34,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:34,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-11 15:21:34,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:34,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:34,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:34,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:34,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887224013] [2020-11-11 15:21:34,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:34,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:34,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:34,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:34,198 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:37,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:37,008 INFO L93 Difference]: Finished difference Result 4930 states and 12650 transitions. [2020-11-11 15:21:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:21:37,010 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:37,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:37,016 INFO L225 Difference]: With dead ends: 4930 [2020-11-11 15:21:37,016 INFO L226 Difference]: Without dead ends: 4660 [2020-11-11 15:21:37,017 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=905, Invalid=2877, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:21:37,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2020-11-11 15:21:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 3487. [2020-11-11 15:21:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:37,075 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:37,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:37,075 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:37,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:37,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:37,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:37,079 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:37,079 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:37,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-11-11 15:21:37,280 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1627455397, now seen corresponding path program 238 times [2020-11-11 15:21:37,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:37,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310699463] [2020-11-11 15:21:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:38,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310699463] [2020-11-11 15:21:38,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002716682] [2020-11-11 15:21:38,231 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:38,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:21:38,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:38,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:21:38,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:38,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:38,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:38,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:38,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:38,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629422148] [2020-11-11 15:21:38,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:38,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:38,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:38,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:38,453 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:41,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:41,893 INFO L93 Difference]: Finished difference Result 4880 states and 12550 transitions. [2020-11-11 15:21:41,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:21:41,894 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:41,901 INFO L225 Difference]: With dead ends: 4880 [2020-11-11 15:21:41,901 INFO L226 Difference]: Without dead ends: 4610 [2020-11-11 15:21:41,901 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1016, Invalid=3274, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:21:41,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2020-11-11 15:21:41,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 3487. [2020-11-11 15:21:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:41,957 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:41,957 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:41,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:41,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:41,961 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:41,961 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:42,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-11-11 15:21:42,162 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:42,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1189491315, now seen corresponding path program 239 times [2020-11-11 15:21:42,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:42,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117243339] [2020-11-11 15:21:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:43,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117243339] [2020-11-11 15:21:43,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755072823] [2020-11-11 15:21:43,021 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:43,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:21:43,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:43,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:43,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:43,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:43,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:43,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:43,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577909878] [2020-11-11 15:21:43,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:43,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:43,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:43,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:43,196 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:46,091 INFO L93 Difference]: Finished difference Result 4830 states and 12450 transitions. [2020-11-11 15:21:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:21:46,092 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:46,099 INFO L225 Difference]: With dead ends: 4830 [2020-11-11 15:21:46,099 INFO L226 Difference]: Without dead ends: 4560 [2020-11-11 15:21:46,099 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=988, Invalid=3044, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:21:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4560 states. [2020-11-11 15:21:46,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4560 to 3487. [2020-11-11 15:21:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:46,149 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:46,149 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:46,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:46,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:46,153 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:46,153 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:46,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:46,354 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:46,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:46,354 INFO L82 PathProgramCache]: Analyzing trace with hash -355801245, now seen corresponding path program 240 times [2020-11-11 15:21:46,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:46,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453409040] [2020-11-11 15:21:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:47,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453409040] [2020-11-11 15:21:47,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090878061] [2020-11-11 15:21:47,188 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:47,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:21:47,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-11 15:21:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:47,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:47,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:47,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:47,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119079367] [2020-11-11 15:21:47,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:47,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:47,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:47,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:47,434 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:50,396 INFO L93 Difference]: Finished difference Result 4780 states and 12350 transitions. [2020-11-11 15:21:50,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:21:50,397 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:50,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:50,403 INFO L225 Difference]: With dead ends: 4780 [2020-11-11 15:21:50,403 INFO L226 Difference]: Without dead ends: 4510 [2020-11-11 15:21:50,404 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=967, Invalid=3323, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:21:50,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2020-11-11 15:21:50,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 3487. [2020-11-11 15:21:50,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:50,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:50,445 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:50,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:50,445 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:50,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:50,448 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:50,448 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:50,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:50,649 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:50,649 INFO L82 PathProgramCache]: Analyzing trace with hash -922967119, now seen corresponding path program 241 times [2020-11-11 15:21:50,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:50,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895878385] [2020-11-11 15:21:50,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:51,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895878385] [2020-11-11 15:21:51,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412622517] [2020-11-11 15:21:51,424 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:51,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:51,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:51,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:51,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:51,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:51,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943014762] [2020-11-11 15:21:51,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:51,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:51,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:51,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:51,589 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:54,070 INFO L93 Difference]: Finished difference Result 4730 states and 12250 transitions. [2020-11-11 15:21:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:21:54,072 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:54,077 INFO L225 Difference]: With dead ends: 4730 [2020-11-11 15:21:54,077 INFO L226 Difference]: Without dead ends: 4460 [2020-11-11 15:21:54,077 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1087, Invalid=3203, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:21:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2020-11-11 15:21:54,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3487. [2020-11-11 15:21:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:54,117 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:54,117 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:54,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:54,120 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:54,120 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:54,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:54,320 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:54,321 INFO L82 PathProgramCache]: Analyzing trace with hash -94255967, now seen corresponding path program 242 times [2020-11-11 15:21:54,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:54,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826151290] [2020-11-11 15:21:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:55,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826151290] [2020-11-11 15:21:55,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93038279] [2020-11-11 15:21:55,201 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:55,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:21:55,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:55,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:55,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:55,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:55,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:55,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:55,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848168417] [2020-11-11 15:21:55,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:55,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:55,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:55,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:55,422 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:58,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:58,929 INFO L93 Difference]: Finished difference Result 4680 states and 12150 transitions. [2020-11-11 15:21:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-11 15:21:58,931 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 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 136 [2020-11-11 15:21:58,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:58,938 INFO L225 Difference]: With dead ends: 4680 [2020-11-11 15:21:58,938 INFO L226 Difference]: Without dead ends: 4410 [2020-11-11 15:21:58,939 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1214, Invalid=3616, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:21:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2020-11-11 15:21:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 3487. [2020-11-11 15:21:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:58,993 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:58,993 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:58,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:58,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:58,997 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:58,997 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:59,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:59,198 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:59,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:59,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1816794513, now seen corresponding path program 243 times [2020-11-11 15:21:59,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:59,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041035714] [2020-11-11 15:21:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:00,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041035714] [2020-11-11 15:22:00,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215103893] [2020-11-11 15:22:00,185 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:00,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:22:00,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:00,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-11 15:22:00,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:00,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:00,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:00,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:22:00,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241373053] [2020-11-11 15:22:00,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:22:00,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:00,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:22:00,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:22:00,401 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:03,507 INFO L93 Difference]: Finished difference Result 4630 states and 12050 transitions. [2020-11-11 15:22:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:22:03,510 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2020-11-11 15:22:03,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:03,517 INFO L225 Difference]: With dead ends: 4630 [2020-11-11 15:22:03,517 INFO L226 Difference]: Without dead ends: 4360 [2020-11-11 15:22:03,517 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1202, Invalid=3354, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:22:03,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4360 states. [2020-11-11 15:22:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4360 to 3487. [2020-11-11 15:22:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:22:03,573 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:22:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:03,574 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:22:03,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:22:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:22:03,579 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:03,579 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:03,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-11-11 15:22:03,783 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:03,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:03,784 INFO L82 PathProgramCache]: Analyzing trace with hash 938637151, now seen corresponding path program 244 times [2020-11-11 15:22:03,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:03,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45013009] [2020-11-11 15:22:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:04,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45013009] [2020-11-11 15:22:04,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213012350] [2020-11-11 15:22:04,656 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:04,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:22:04,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:04,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:22:04,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:04,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:22:04,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:04,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:04,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:22:04,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747192873] [2020-11-11 15:22:04,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:22:04,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:04,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:22:04,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:22:04,924 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:08,733 INFO L93 Difference]: Finished difference Result 4580 states and 11950 transitions. [2020-11-11 15:22:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-11 15:22:08,737 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 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 136 [2020-11-11 15:22:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:08,745 INFO L225 Difference]: With dead ends: 4580 [2020-11-11 15:22:08,746 INFO L226 Difference]: Without dead ends: 4310 [2020-11-11 15:22:08,747 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1337, Invalid=3775, Unknown=0, NotChecked=0, Total=5112 [2020-11-11 15:22:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2020-11-11 15:22:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 3487. [2020-11-11 15:22:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:22:08,811 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:22:08,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:08,811 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:22:08,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:22:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:22:08,816 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:08,816 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:09,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-11-11 15:22:09,025 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:09,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:09,026 INFO L82 PathProgramCache]: Analyzing trace with hash -417929555, now seen corresponding path program 245 times [2020-11-11 15:22:09,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:09,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669465990] [2020-11-11 15:22:09,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:09,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669465990] [2020-11-11 15:22:09,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196061811] [2020-11-11 15:22:09,881 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:09,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:22:09,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:09,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:22:09,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:10,033 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:10,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:10,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:22:10,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069665878] [2020-11-11 15:22:10,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:22:10,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:10,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:22:10,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:22:10,052 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:13,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:13,174 INFO L93 Difference]: Finished difference Result 4530 states and 11850 transitions. [2020-11-11 15:22:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 15:22:13,177 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2020-11-11 15:22:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:13,184 INFO L225 Difference]: With dead ends: 4530 [2020-11-11 15:22:13,185 INFO L226 Difference]: Without dead ends: 4260 [2020-11-11 15:22:13,185 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1333, Invalid=3497, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:22:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2020-11-11 15:22:13,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 3487. [2020-11-11 15:22:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:22:13,242 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:22:13,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:13,243 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:22:13,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:13,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:22:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:22:13,246 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:13,247 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:13,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-11-11 15:22:13,448 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1413603229, now seen corresponding path program 246 times [2020-11-11 15:22:13,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:13,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021490654] [2020-11-11 15:22:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:14,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021490654] [2020-11-11 15:22:14,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112382302] [2020-11-11 15:22:14,310 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:14,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:22:14,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:14,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:22:14,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:14,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:14,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:14,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:22:14,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212823103] [2020-11-11 15:22:14,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:22:14,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:14,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:22:14,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:22:14,553 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:18,236 INFO L93 Difference]: Finished difference Result 4525 states and 11860 transitions. [2020-11-11 15:22:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-11 15:22:18,238 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 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 136 [2020-11-11 15:22:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:18,245 INFO L225 Difference]: With dead ends: 4525 [2020-11-11 15:22:18,245 INFO L226 Difference]: Without dead ends: 4255 [2020-11-11 15:22:18,245 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1255, Invalid=3857, Unknown=0, NotChecked=0, Total=5112 [2020-11-11 15:22:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2020-11-11 15:22:18,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 3487. [2020-11-11 15:22:18,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.765633964429145) internal successors, (9641), 3486 states have internal predecessors, (9641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:18,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9641 transitions. [2020-11-11 15:22:18,299 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9641 transitions. Word has length 136 [2020-11-11 15:22:18,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:18,300 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9641 transitions. [2020-11-11 15:22:18,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:18,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9641 transitions. [2020-11-11 15:22:18,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:22:18,333 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:18,333 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:18,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-11-11 15:22:18,534 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:18,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:18,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2042394731, now seen corresponding path program 247 times [2020-11-11 15:22:18,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:18,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3690600] [2020-11-11 15:22:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:19,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3690600] [2020-11-11 15:22:19,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035501672] [2020-11-11 15:22:19,466 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:19,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:22:19,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:19,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:19,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:19,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:22:19,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372653114] [2020-11-11 15:22:19,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:22:19,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:19,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:22:19,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:22:19,646 INFO L87 Difference]: Start difference. First operand 3487 states and 9641 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:23,005 INFO L93 Difference]: Finished difference Result 5612 states and 14994 transitions. [2020-11-11 15:22:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-11 15:22:23,006 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2020-11-11 15:22:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:23,014 INFO L225 Difference]: With dead ends: 5612 [2020-11-11 15:22:23,015 INFO L226 Difference]: Without dead ends: 5342 [2020-11-11 15:22:23,015 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1481, Invalid=3631, Unknown=0, NotChecked=0, Total=5112 [2020-11-11 15:22:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5342 states. [2020-11-11 15:22:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5342 to 3612. [2020-11-11 15:22:23,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3611 states have (on average 2.7781777900858486) internal successors, (10032), 3611 states have internal predecessors, (10032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 10032 transitions. [2020-11-11 15:22:23,101 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 10032 transitions. Word has length 136 [2020-11-11 15:22:23,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:23,101 INFO L481 AbstractCegarLoop]: Abstraction has 3612 states and 10032 transitions. [2020-11-11 15:22:23,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 10032 transitions. [2020-11-11 15:22:23,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:22:23,105 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:23,105 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:23,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-11-11 15:22:23,306 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:23,307 INFO L82 PathProgramCache]: Analyzing trace with hash -541364611, now seen corresponding path program 248 times [2020-11-11 15:22:23,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:23,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468667365] [2020-11-11 15:22:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:24,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468667365] [2020-11-11 15:22:24,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235896722] [2020-11-11 15:22:24,324 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:24,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:22:24,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:24,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:24,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:24,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:24,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:22:24,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131747638] [2020-11-11 15:22:24,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:22:24,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:24,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:22:24,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:22:24,555 INFO L87 Difference]: Start difference. First operand 3612 states and 10032 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:28,417 INFO L93 Difference]: Finished difference Result 4651 states and 12350 transitions. [2020-11-11 15:22:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-11 15:22:28,419 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 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 136 [2020-11-11 15:22:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:28,425 INFO L225 Difference]: With dead ends: 4651 [2020-11-11 15:22:28,426 INFO L226 Difference]: Without dead ends: 4180 [2020-11-11 15:22:28,426 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1380, Invalid=4022, Unknown=0, NotChecked=0, Total=5402 [2020-11-11 15:22:28,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2020-11-11 15:22:28,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 2502. [2020-11-11 15:22:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.689324270291883) internal successors, (6726), 2501 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6726 transitions. [2020-11-11 15:22:28,466 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6726 transitions. Word has length 136 [2020-11-11 15:22:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:28,466 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6726 transitions. [2020-11-11 15:22:28,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:28,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6726 transitions. [2020-11-11 15:22:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:28,469 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:28,469 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:28,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:28,671 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:28,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:28,672 INFO L82 PathProgramCache]: Analyzing trace with hash 460908696, now seen corresponding path program 249 times [2020-11-11 15:22:28,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:28,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76164122] [2020-11-11 15:22:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:29,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76164122] [2020-11-11 15:22:29,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47855454] [2020-11-11 15:22:29,833 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:29,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:22:29,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:29,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:29,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:29,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:30,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:30,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-11 15:22:30,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214142638] [2020-11-11 15:22:30,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:22:30,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:30,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:22:30,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:22:30,007 INFO L87 Difference]: Start difference. First operand 2502 states and 6726 transitions. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:32,224 INFO L93 Difference]: Finished difference Result 3995 states and 9890 transitions. [2020-11-11 15:22:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:22:32,226 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2020-11-11 15:22:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:32,231 INFO L225 Difference]: With dead ends: 3995 [2020-11-11 15:22:32,232 INFO L226 Difference]: Without dead ends: 3725 [2020-11-11 15:22:32,232 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=806, Invalid=2274, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:22:32,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2020-11-11 15:22:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 2552. [2020-11-11 15:22:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.6954135633085063) internal successors, (6876), 2551 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6876 transitions. [2020-11-11 15:22:32,275 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6876 transitions. Word has length 141 [2020-11-11 15:22:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:32,275 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 6876 transitions. [2020-11-11 15:22:32,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6876 transitions. [2020-11-11 15:22:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:32,278 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:32,278 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:32,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:32,481 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:32,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1266805368, now seen corresponding path program 250 times [2020-11-11 15:22:32,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:32,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370045711] [2020-11-11 15:22:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:33,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370045711] [2020-11-11 15:22:33,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774299655] [2020-11-11 15:22:33,652 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:33,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:22:33,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:33,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:22:33,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:33,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:22:33,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:33,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:33,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:22:33,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267446533] [2020-11-11 15:22:33,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:22:33,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:33,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:22:33,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:22:33,886 INFO L87 Difference]: Start difference. First operand 2552 states and 6876 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:36,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:36,256 INFO L93 Difference]: Finished difference Result 4540 states and 11030 transitions. [2020-11-11 15:22:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:22:36,257 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 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 141 [2020-11-11 15:22:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:36,263 INFO L225 Difference]: With dead ends: 4540 [2020-11-11 15:22:36,263 INFO L226 Difference]: Without dead ends: 4270 [2020-11-11 15:22:36,263 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=865, Invalid=2557, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:22:36,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2020-11-11 15:22:36,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 2602. [2020-11-11 15:22:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2601 states have (on average 2.701268742791234) internal successors, (7026), 2601 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 7026 transitions. [2020-11-11 15:22:36,305 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 7026 transitions. Word has length 141 [2020-11-11 15:22:36,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:36,306 INFO L481 AbstractCegarLoop]: Abstraction has 2602 states and 7026 transitions. [2020-11-11 15:22:36,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 7026 transitions. [2020-11-11 15:22:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:36,308 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:36,309 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:36,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:36,509 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:36,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2095364310, now seen corresponding path program 251 times [2020-11-11 15:22:36,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:36,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373467865] [2020-11-11 15:22:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:37,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373467865] [2020-11-11 15:22:37,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102364543] [2020-11-11 15:22:37,558 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:37,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:22:37,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:37,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:37,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:37,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:37,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:37,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-11 15:22:37,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84781697] [2020-11-11 15:22:37,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:22:37,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:37,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:22:37,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:22:37,724 INFO L87 Difference]: Start difference. First operand 2602 states and 7026 transitions. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:40,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:40,056 INFO L93 Difference]: Finished difference Result 4545 states and 11090 transitions. [2020-11-11 15:22:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:22:40,058 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2020-11-11 15:22:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:40,064 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:40,064 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:40,065 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=861, Invalid=2561, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:22:40,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:40,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2652. [2020-11-11 15:22:40,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.7069030554507734) internal successors, (7176), 2651 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 7176 transitions. [2020-11-11 15:22:40,132 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 7176 transitions. Word has length 141 [2020-11-11 15:22:40,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:40,132 INFO L481 AbstractCegarLoop]: Abstraction has 2652 states and 7176 transitions. [2020-11-11 15:22:40,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 7176 transitions. [2020-11-11 15:22:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:40,135 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:40,135 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:40,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:40,340 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:40,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:40,340 INFO L82 PathProgramCache]: Analyzing trace with hash 52449734, now seen corresponding path program 252 times [2020-11-11 15:22:40,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:40,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485972961] [2020-11-11 15:22:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:41,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485972961] [2020-11-11 15:22:41,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84645152] [2020-11-11 15:22:41,483 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:41,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:22:41,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:41,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:41,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:41,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:22:41,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:41,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:41,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:22:41,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695594000] [2020-11-11 15:22:41,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:22:41,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:41,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:22:41,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:22:41,725 INFO L87 Difference]: Start difference. First operand 2652 states and 7176 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:44,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:44,266 INFO L93 Difference]: Finished difference Result 4545 states and 11140 transitions. [2020-11-11 15:22:44,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:22:44,269 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 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 141 [2020-11-11 15:22:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:44,275 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:44,275 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:44,276 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=883, Invalid=2777, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 15:22:44,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2702. [2020-11-11 15:22:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 2.712328767123288) internal successors, (7326), 2701 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 7326 transitions. [2020-11-11 15:22:44,343 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 7326 transitions. Word has length 141 [2020-11-11 15:22:44,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:44,344 INFO L481 AbstractCegarLoop]: Abstraction has 2702 states and 7326 transitions. [2020-11-11 15:22:44,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:44,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 7326 transitions. [2020-11-11 15:22:44,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:44,347 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:44,347 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:44,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:44,553 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:44,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:44,553 INFO L82 PathProgramCache]: Analyzing trace with hash -783409516, now seen corresponding path program 253 times [2020-11-11 15:22:44,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:44,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657740246] [2020-11-11 15:22:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:45,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657740246] [2020-11-11 15:22:45,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215596488] [2020-11-11 15:22:45,618 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:45,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:45,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:45,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:45,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:45,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-11 15:22:45,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990308437] [2020-11-11 15:22:45,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:22:45,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:45,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:22:45,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:22:45,780 INFO L87 Difference]: Start difference. First operand 2702 states and 7326 transitions. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:48,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:48,180 INFO L93 Difference]: Finished difference Result 4545 states and 11190 transitions. [2020-11-11 15:22:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:22:48,182 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2020-11-11 15:22:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:48,188 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:48,188 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:48,189 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=893, Invalid=2767, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 15:22:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:48,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2752. [2020-11-11 15:22:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 2.717557251908397) internal successors, (7476), 2751 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 7476 transitions. [2020-11-11 15:22:48,274 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 7476 transitions. Word has length 141 [2020-11-11 15:22:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:48,275 INFO L481 AbstractCegarLoop]: Abstraction has 2752 states and 7476 transitions. [2020-11-11 15:22:48,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 7476 transitions. [2020-11-11 15:22:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:48,277 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:48,278 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:48,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:48,478 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:48,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:48,479 INFO L82 PathProgramCache]: Analyzing trace with hash 899097476, now seen corresponding path program 254 times [2020-11-11 15:22:48,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:48,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954227796] [2020-11-11 15:22:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:49,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954227796] [2020-11-11 15:22:49,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735631181] [2020-11-11 15:22:49,587 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:49,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:22:49,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:49,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:49,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:49,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:22:49,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:49,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:49,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:22:49,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461168529] [2020-11-11 15:22:49,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:22:49,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:49,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:22:49,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:22:49,813 INFO L87 Difference]: Start difference. First operand 2752 states and 7476 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:52,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:52,586 INFO L93 Difference]: Finished difference Result 4545 states and 11240 transitions. [2020-11-11 15:22:52,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:22:52,589 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 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 141 [2020-11-11 15:22:52,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:52,596 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:52,596 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:52,597 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=917, Invalid=2989, Unknown=0, NotChecked=0, Total=3906 [2020-11-11 15:22:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:52,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2802. [2020-11-11 15:22:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 2.7225990717600856) internal successors, (7626), 2801 states have internal predecessors, (7626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 7626 transitions. [2020-11-11 15:22:52,669 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 7626 transitions. Word has length 141 [2020-11-11 15:22:52,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:52,669 INFO L481 AbstractCegarLoop]: Abstraction has 2802 states and 7626 transitions. [2020-11-11 15:22:52,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:52,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 7626 transitions. [2020-11-11 15:22:52,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:52,672 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:52,672 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:52,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:52,873 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:52,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:52,874 INFO L82 PathProgramCache]: Analyzing trace with hash -953550382, now seen corresponding path program 255 times [2020-11-11 15:22:52,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:52,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423744199] [2020-11-11 15:22:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:53,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423744199] [2020-11-11 15:22:53,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114329999] [2020-11-11 15:22:53,914 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:54,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:22:54,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:54,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-11 15:22:54,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:54,070 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:54,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:54,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-11 15:22:54,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122814787] [2020-11-11 15:22:54,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:22:54,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:54,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:22:54,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:22:54,098 INFO L87 Difference]: Start difference. First operand 2802 states and 7626 transitions. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:56,684 INFO L93 Difference]: Finished difference Result 4545 states and 11290 transitions. [2020-11-11 15:22:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:22:56,687 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2020-11-11 15:22:56,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:56,694 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:56,694 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:56,695 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=941, Invalid=2965, Unknown=0, NotChecked=0, Total=3906 [2020-11-11 15:22:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2852. [2020-11-11 15:22:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 2.7274640477025605) internal successors, (7776), 2851 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 7776 transitions. [2020-11-11 15:22:56,785 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 7776 transitions. Word has length 141 [2020-11-11 15:22:56,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:56,785 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 7776 transitions. [2020-11-11 15:22:56,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:56,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 7776 transitions. [2020-11-11 15:22:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:56,788 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:56,789 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:56,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-11-11 15:22:56,989 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:56,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:56,990 INFO L82 PathProgramCache]: Analyzing trace with hash -887657790, now seen corresponding path program 256 times [2020-11-11 15:22:56,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:56,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484977977] [2020-11-11 15:22:56,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:58,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484977977] [2020-11-11 15:22:58,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545912168] [2020-11-11 15:22:58,059 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:58,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:22:58,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:58,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:22:58,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:58,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:22:58,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:58,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:58,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:22:58,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942334714] [2020-11-11 15:22:58,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:22:58,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:58,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:22:58,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:22:58,290 INFO L87 Difference]: Start difference. First operand 2852 states and 7776 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:01,301 INFO L93 Difference]: Finished difference Result 4545 states and 11340 transitions. [2020-11-11 15:23:01,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:23:01,303 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 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 141 [2020-11-11 15:23:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:01,310 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:01,310 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:01,311 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=967, Invalid=3193, Unknown=0, NotChecked=0, Total=4160 [2020-11-11 15:23:01,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2902. [2020-11-11 15:23:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 2.7321613236814892) internal successors, (7926), 2901 states have internal predecessors, (7926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 7926 transitions. [2020-11-11 15:23:01,386 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 7926 transitions. Word has length 141 [2020-11-11 15:23:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:01,386 INFO L481 AbstractCegarLoop]: Abstraction has 2902 states and 7926 transitions. [2020-11-11 15:23:01,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:01,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 7926 transitions. [2020-11-11 15:23:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:01,390 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:01,390 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:01,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:01,591 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:01,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:01,591 INFO L82 PathProgramCache]: Analyzing trace with hash -813356400, now seen corresponding path program 257 times [2020-11-11 15:23:01,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:01,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343488963] [2020-11-11 15:23:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:02,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343488963] [2020-11-11 15:23:02,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129976114] [2020-11-11 15:23:02,609 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:02,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:23:02,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:02,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:02,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:02,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:02,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:02,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-11 15:23:02,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029533579] [2020-11-11 15:23:02,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:23:02,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:02,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:23:02,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:23:02,781 INFO L87 Difference]: Start difference. First operand 2902 states and 7926 transitions. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:05,588 INFO L93 Difference]: Finished difference Result 4545 states and 11390 transitions. [2020-11-11 15:23:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:23:05,589 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2020-11-11 15:23:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:05,597 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:05,597 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:05,597 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1005, Invalid=3155, Unknown=0, NotChecked=0, Total=4160 [2020-11-11 15:23:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2952. [2020-11-11 15:23:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 2.7366994239240934) internal successors, (8076), 2951 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 8076 transitions. [2020-11-11 15:23:05,675 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 8076 transitions. Word has length 141 [2020-11-11 15:23:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:05,676 INFO L481 AbstractCegarLoop]: Abstraction has 2952 states and 8076 transitions. [2020-11-11 15:23:05,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 8076 transitions. [2020-11-11 15:23:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:05,679 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:05,679 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:05,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-11-11 15:23:05,880 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:05,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:05,881 INFO L82 PathProgramCache]: Analyzing trace with hash -177338496, now seen corresponding path program 258 times [2020-11-11 15:23:05,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:05,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068924848] [2020-11-11 15:23:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:06,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068924848] [2020-11-11 15:23:06,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416126914] [2020-11-11 15:23:06,945 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:07,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:23:07,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:07,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:07,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:07,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:23:07,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:07,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:07,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:23:07,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072412666] [2020-11-11 15:23:07,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:23:07,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:07,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:23:07,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:23:07,228 INFO L87 Difference]: Start difference. First operand 2952 states and 8076 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:10,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:10,608 INFO L93 Difference]: Finished difference Result 4545 states and 11440 transitions. [2020-11-11 15:23:10,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:23:10,611 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 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 141 [2020-11-11 15:23:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:10,617 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:10,617 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:10,617 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1033, Invalid=3389, Unknown=0, NotChecked=0, Total=4422 [2020-11-11 15:23:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3002. [2020-11-11 15:23:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 2.741086304565145) internal successors, (8226), 3001 states have internal predecessors, (8226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 8226 transitions. [2020-11-11 15:23:10,670 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 8226 transitions. Word has length 141 [2020-11-11 15:23:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:10,670 INFO L481 AbstractCegarLoop]: Abstraction has 3002 states and 8226 transitions. [2020-11-11 15:23:10,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 8226 transitions. [2020-11-11 15:23:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:10,674 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:10,674 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:10,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-11-11 15:23:10,875 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:10,876 INFO L82 PathProgramCache]: Analyzing trace with hash -66809650, now seen corresponding path program 259 times [2020-11-11 15:23:10,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:10,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061227850] [2020-11-11 15:23:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:11,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061227850] [2020-11-11 15:23:11,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059799008] [2020-11-11 15:23:11,870 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:11,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:11,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:12,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:12,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:12,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-11 15:23:12,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310554114] [2020-11-11 15:23:12,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:23:12,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:12,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:23:12,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:23:12,045 INFO L87 Difference]: Start difference. First operand 3002 states and 8226 transitions. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:15,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:15,044 INFO L93 Difference]: Finished difference Result 4545 states and 11490 transitions. [2020-11-11 15:23:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:23:15,046 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2020-11-11 15:23:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:15,052 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:15,052 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:15,053 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1085, Invalid=3337, Unknown=0, NotChecked=0, Total=4422 [2020-11-11 15:23:15,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:15,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3052. [2020-11-11 15:23:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3051 states have (on average 2.745329400196657) internal successors, (8376), 3051 states have internal predecessors, (8376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 8376 transitions. [2020-11-11 15:23:15,108 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 8376 transitions. Word has length 141 [2020-11-11 15:23:15,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:15,109 INFO L481 AbstractCegarLoop]: Abstraction has 3052 states and 8376 transitions. [2020-11-11 15:23:15,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 8376 transitions. [2020-11-11 15:23:15,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:15,112 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:15,112 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:15,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:15,313 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:15,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1996478910, now seen corresponding path program 260 times [2020-11-11 15:23:15,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:15,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235600178] [2020-11-11 15:23:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:16,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235600178] [2020-11-11 15:23:16,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383912427] [2020-11-11 15:23:16,467 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:16,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:23:16,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:16,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:16,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:16,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:23:16,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:16,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:16,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:23:16,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667607950] [2020-11-11 15:23:16,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:23:16,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:16,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:23:16,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:23:16,711 INFO L87 Difference]: Start difference. First operand 3052 states and 8376 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:20,309 INFO L93 Difference]: Finished difference Result 4545 states and 11540 transitions. [2020-11-11 15:23:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:23:20,313 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 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 141 [2020-11-11 15:23:20,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:20,318 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:20,318 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:20,318 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1115, Invalid=3577, Unknown=0, NotChecked=0, Total=4692 [2020-11-11 15:23:20,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3102. [2020-11-11 15:23:20,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 2.749435665914221) internal successors, (8526), 3101 states have internal predecessors, (8526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 8526 transitions. [2020-11-11 15:23:20,377 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 8526 transitions. Word has length 141 [2020-11-11 15:23:20,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:20,377 INFO L481 AbstractCegarLoop]: Abstraction has 3102 states and 8526 transitions. [2020-11-11 15:23:20,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:20,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 8526 transitions. [2020-11-11 15:23:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:20,381 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:20,381 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:20,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-11-11 15:23:20,582 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1558514828, now seen corresponding path program 261 times [2020-11-11 15:23:20,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:20,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248905909] [2020-11-11 15:23:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:21,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248905909] [2020-11-11 15:23:21,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526111247] [2020-11-11 15:23:21,579 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:21,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:23:21,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:21,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-11 15:23:21,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:21,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:21,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:21,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-11 15:23:21,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257072099] [2020-11-11 15:23:21,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:23:21,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:21,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:23:21,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:23:21,766 INFO L87 Difference]: Start difference. First operand 3102 states and 8526 transitions. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:24,937 INFO L93 Difference]: Finished difference Result 4545 states and 11590 transitions. [2020-11-11 15:23:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:23:24,940 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2020-11-11 15:23:24,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:24,947 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:24,947 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:24,947 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1181, Invalid=3511, Unknown=0, NotChecked=0, Total=4692 [2020-11-11 15:23:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3152. [2020-11-11 15:23:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 3151 states have (on average 2.753411615360203) internal successors, (8676), 3151 states have internal predecessors, (8676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 8676 transitions. [2020-11-11 15:23:25,005 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 8676 transitions. Word has length 141 [2020-11-11 15:23:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:25,005 INFO L481 AbstractCegarLoop]: Abstraction has 3152 states and 8676 transitions. [2020-11-11 15:23:25,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 8676 transitions. [2020-11-11 15:23:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:25,008 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:25,008 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:25,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:25,209 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:25,210 INFO L82 PathProgramCache]: Analyzing trace with hash 13222268, now seen corresponding path program 262 times [2020-11-11 15:23:25,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:25,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568112252] [2020-11-11 15:23:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:26,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568112252] [2020-11-11 15:23:26,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344821876] [2020-11-11 15:23:26,300 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:26,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:23:26,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:26,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:23:26,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:26,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:23:26,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:26,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:26,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:23:26,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640894606] [2020-11-11 15:23:26,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:23:26,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:26,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:23:26,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:23:26,608 INFO L87 Difference]: Start difference. First operand 3152 states and 8676 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:30,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:30,559 INFO L93 Difference]: Finished difference Result 4545 states and 11640 transitions. [2020-11-11 15:23:30,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-11 15:23:30,561 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 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 141 [2020-11-11 15:23:30,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:30,568 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:30,568 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:30,568 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1213, Invalid=3757, Unknown=0, NotChecked=0, Total=4970 [2020-11-11 15:23:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3202. [2020-11-11 15:23:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3201 states have (on average 2.7572633552014993) internal successors, (8826), 3201 states have internal predecessors, (8826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:30,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 8826 transitions. [2020-11-11 15:23:30,629 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 8826 transitions. Word has length 141 [2020-11-11 15:23:30,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:30,630 INFO L481 AbstractCegarLoop]: Abstraction has 3202 states and 8826 transitions. [2020-11-11 15:23:30,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 8826 transitions. [2020-11-11 15:23:30,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:30,634 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:30,634 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:30,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:30,834 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:30,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:30,835 INFO L82 PathProgramCache]: Analyzing trace with hash -553943606, now seen corresponding path program 263 times [2020-11-11 15:23:30,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:30,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038569877] [2020-11-11 15:23:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:32,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038569877] [2020-11-11 15:23:32,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575362103] [2020-11-11 15:23:32,008 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:32,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:23:32,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:32,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:32,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:32,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:32,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:32,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-11 15:23:32,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668875553] [2020-11-11 15:23:32,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:23:32,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:32,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:23:32,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:23:32,192 INFO L87 Difference]: Start difference. First operand 3202 states and 8826 transitions. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:35,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:35,595 INFO L93 Difference]: Finished difference Result 4545 states and 11690 transitions. [2020-11-11 15:23:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 15:23:35,598 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2020-11-11 15:23:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:35,604 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:35,604 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:35,605 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1293, Invalid=3677, Unknown=0, NotChecked=0, Total=4970 [2020-11-11 15:23:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:35,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3252. [2020-11-11 15:23:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3252 states, 3251 states have (on average 2.7609966164257154) internal successors, (8976), 3251 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3252 states to 3252 states and 8976 transitions. [2020-11-11 15:23:35,667 INFO L78 Accepts]: Start accepts. Automaton has 3252 states and 8976 transitions. Word has length 141 [2020-11-11 15:23:35,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:35,668 INFO L481 AbstractCegarLoop]: Abstraction has 3252 states and 8976 transitions. [2020-11-11 15:23:35,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3252 states and 8976 transitions. [2020-11-11 15:23:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:35,671 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:35,672 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:35,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:35,872 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:35,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash 274767546, now seen corresponding path program 264 times [2020-11-11 15:23:35,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:35,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454303058] [2020-11-11 15:23:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:36,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454303058] [2020-11-11 15:23:36,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547091634] [2020-11-11 15:23:36,906 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:37,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:23:37,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:37,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-11 15:23:37,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:37,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:37,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:37,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:23:37,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226600969] [2020-11-11 15:23:37,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:23:37,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:37,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:23:37,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:23:37,169 INFO L87 Difference]: Start difference. First operand 3252 states and 8976 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:41,182 INFO L93 Difference]: Finished difference Result 4545 states and 11740 transitions. [2020-11-11 15:23:41,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-11 15:23:41,186 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 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 141 [2020-11-11 15:23:41,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:41,192 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:41,193 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:41,193 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1240, Invalid=4016, Unknown=0, NotChecked=0, Total=5256 [2020-11-11 15:23:41,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3302. [2020-11-11 15:23:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3302 states, 3301 states have (on average 2.764616782793093) internal successors, (9126), 3301 states have internal predecessors, (9126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:41,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 9126 transitions. [2020-11-11 15:23:41,255 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 9126 transitions. Word has length 141 [2020-11-11 15:23:41,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:41,255 INFO L481 AbstractCegarLoop]: Abstraction has 3302 states and 9126 transitions. [2020-11-11 15:23:41,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:41,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 9126 transitions. [2020-11-11 15:23:41,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:41,260 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:41,261 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:41,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:41,474 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:41,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:41,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1447771000, now seen corresponding path program 265 times [2020-11-11 15:23:41,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:41,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862188893] [2020-11-11 15:23:41,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:42,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862188893] [2020-11-11 15:23:42,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345444350] [2020-11-11 15:23:42,461 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:42,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:42,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:42,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:42,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-11 15:23:42,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718732685] [2020-11-11 15:23:42,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:23:42,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:42,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:23:42,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:23:42,678 INFO L87 Difference]: Start difference. First operand 3302 states and 9126 transitions. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:46,117 INFO L93 Difference]: Finished difference Result 4545 states and 11790 transitions. [2020-11-11 15:23:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-11 15:23:46,121 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2020-11-11 15:23:46,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:46,127 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:46,127 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:46,127 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1421, Invalid=3835, Unknown=0, NotChecked=0, Total=5256 [2020-11-11 15:23:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3352. [2020-11-11 15:23:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 2.7681289167412713) internal successors, (9276), 3351 states have internal predecessors, (9276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 9276 transitions. [2020-11-11 15:23:46,177 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 9276 transitions. Word has length 141 [2020-11-11 15:23:46,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:46,177 INFO L481 AbstractCegarLoop]: Abstraction has 3352 states and 9276 transitions. [2020-11-11 15:23:46,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:46,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 9276 transitions. [2020-11-11 15:23:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:46,180 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:46,180 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:46,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-11-11 15:23:46,380 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1307660664, now seen corresponding path program 266 times [2020-11-11 15:23:46,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:46,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144062124] [2020-11-11 15:23:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:47,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144062124] [2020-11-11 15:23:47,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67144246] [2020-11-11 15:23:47,192 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:47,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:23:47,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:47,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:47,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:47,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:23:47,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:47,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:47,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:23:47,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60762455] [2020-11-11 15:23:47,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:23:47,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:47,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:23:47,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:23:47,447 INFO L87 Difference]: Start difference. First operand 3352 states and 9276 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:51,135 INFO L93 Difference]: Finished difference Result 4545 states and 11840 transitions. [2020-11-11 15:23:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-11 15:23:51,137 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 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 141 [2020-11-11 15:23:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:51,142 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:51,142 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:51,143 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1457, Invalid=4093, Unknown=0, NotChecked=0, Total=5550 [2020-11-11 15:23:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3402. [2020-11-11 15:23:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 2.7715377830049985) internal successors, (9426), 3401 states have internal predecessors, (9426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 9426 transitions. [2020-11-11 15:23:51,193 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 9426 transitions. Word has length 141 [2020-11-11 15:23:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:51,194 INFO L481 AbstractCegarLoop]: Abstraction has 3402 states and 9426 transitions. [2020-11-11 15:23:51,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 9426 transitions. [2020-11-11 15:23:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:51,196 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:51,197 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:51,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:51,397 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:51,398 INFO L82 PathProgramCache]: Analyzing trace with hash -48906042, now seen corresponding path program 267 times [2020-11-11 15:23:51,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:51,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904931769] [2020-11-11 15:23:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:52,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904931769] [2020-11-11 15:23:52,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86424038] [2020-11-11 15:23:52,243 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:52,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:23:52,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:52,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-11 15:23:52,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:52,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:52,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:52,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-11 15:23:52,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201735058] [2020-11-11 15:23:52,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:23:52,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:52,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:23:52,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:23:52,425 INFO L87 Difference]: Start difference. First operand 3402 states and 9426 transitions. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:55,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:55,479 INFO L93 Difference]: Finished difference Result 4545 states and 11890 transitions. [2020-11-11 15:23:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-11 15:23:55,481 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2020-11-11 15:23:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:55,487 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:55,488 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:55,488 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1565, Invalid=3985, Unknown=0, NotChecked=0, Total=5550 [2020-11-11 15:23:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3452. [2020-11-11 15:23:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 2.7748478701825556) internal successors, (9576), 3451 states have internal predecessors, (9576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 9576 transitions. [2020-11-11 15:23:55,572 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 9576 transitions. Word has length 141 [2020-11-11 15:23:55,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:55,572 INFO L481 AbstractCegarLoop]: Abstraction has 3452 states and 9576 transitions. [2020-11-11 15:23:55,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:55,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 9576 transitions. [2020-11-11 15:23:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:55,575 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:55,575 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:55,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-11-11 15:23:55,775 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:55,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:55,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1782626742, now seen corresponding path program 268 times [2020-11-11 15:23:55,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:55,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524092972] [2020-11-11 15:23:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:56,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524092972] [2020-11-11 15:23:56,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541106202] [2020-11-11 15:23:56,654 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:56,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:23:56,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:56,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:23:56,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:56,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:23:56,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:56,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:56,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:23:56,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83122007] [2020-11-11 15:23:56,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:23:56,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:56,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:23:56,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:23:56,882 INFO L87 Difference]: Start difference. First operand 3452 states and 9576 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:00,627 INFO L93 Difference]: Finished difference Result 4590 states and 12060 transitions. [2020-11-11 15:24:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-11 15:24:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 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 141 [2020-11-11 15:24:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:00,635 INFO L225 Difference]: With dead ends: 4590 [2020-11-11 15:24:00,635 INFO L226 Difference]: Without dead ends: 4320 [2020-11-11 15:24:00,635 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1603, Invalid=4249, Unknown=0, NotChecked=0, Total=5852 [2020-11-11 15:24:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2020-11-11 15:24:00,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 3502. [2020-11-11 15:24:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3501 states have (on average 2.7823479005998286) internal successors, (9741), 3501 states have internal predecessors, (9741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:00,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 9741 transitions. [2020-11-11 15:24:00,682 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 9741 transitions. Word has length 141 [2020-11-11 15:24:00,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:00,682 INFO L481 AbstractCegarLoop]: Abstraction has 3502 states and 9741 transitions. [2020-11-11 15:24:00,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 9741 transitions. [2020-11-11 15:24:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:24:00,685 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:00,685 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:00,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-11-11 15:24:00,886 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:00,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1883549052, now seen corresponding path program 269 times [2020-11-11 15:24:00,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:00,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130972389] [2020-11-11 15:24:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:01,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130972389] [2020-11-11 15:24:01,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113066377] [2020-11-11 15:24:01,674 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:01,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:24:01,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:01,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:24:01,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:01,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:01,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:01,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-11 15:24:01,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769601634] [2020-11-11 15:24:01,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:24:01,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:01,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:24:01,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:24:01,850 INFO L87 Difference]: Start difference. First operand 3502 states and 9741 transitions. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:04,924 INFO L93 Difference]: Finished difference Result 5652 states and 15144 transitions. [2020-11-11 15:24:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-11 15:24:04,926 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2020-11-11 15:24:04,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:04,932 INFO L225 Difference]: With dead ends: 5652 [2020-11-11 15:24:04,932 INFO L226 Difference]: Without dead ends: 5382 [2020-11-11 15:24:04,933 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1726, Invalid=4126, Unknown=0, NotChecked=0, Total=5852 [2020-11-11 15:24:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5382 states. [2020-11-11 15:24:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5382 to 3627. [2020-11-11 15:24:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 2.7942636514065087) internal successors, (10132), 3626 states have internal predecessors, (10132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:04,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 10132 transitions. [2020-11-11 15:24:04,986 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 10132 transitions. Word has length 141 [2020-11-11 15:24:04,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:04,987 INFO L481 AbstractCegarLoop]: Abstraction has 3627 states and 10132 transitions. [2020-11-11 15:24:04,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:04,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 10132 transitions. [2020-11-11 15:24:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:24:04,990 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:04,990 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:05,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:05,190 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:05,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:05,191 INFO L82 PathProgramCache]: Analyzing trace with hash -172341098, now seen corresponding path program 270 times [2020-11-11 15:24:05,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:05,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55646286] [2020-11-11 15:24:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:06,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55646286] [2020-11-11 15:24:06,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053154883] [2020-11-11 15:24:06,014 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:06,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:24:06,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:06,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:06,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:06,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:06,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:06,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-11-11 15:24:06,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124352056] [2020-11-11 15:24:06,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:06,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:06,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:06,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:06,292 INFO L87 Difference]: Start difference. First operand 3627 states and 10132 transitions. Second operand has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:10,213 INFO L93 Difference]: Finished difference Result 5047 states and 13390 transitions. [2020-11-11 15:24:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-11 15:24:10,215 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 0 states have call successors, (0), 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 141 [2020-11-11 15:24:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:10,221 INFO L225 Difference]: With dead ends: 5047 [2020-11-11 15:24:10,221 INFO L226 Difference]: Without dead ends: 4520 [2020-11-11 15:24:10,222 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1676, Invalid=5130, Unknown=0, NotChecked=0, Total=6806 [2020-11-11 15:24:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2020-11-11 15:24:10,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3637. [2020-11-11 15:24:10,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 3636 states have (on average 2.7876787678767876) internal successors, (10136), 3636 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 10136 transitions. [2020-11-11 15:24:10,271 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 10136 transitions. Word has length 141 [2020-11-11 15:24:10,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:10,271 INFO L481 AbstractCegarLoop]: Abstraction has 3637 states and 10136 transitions. [2020-11-11 15:24:10,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:10,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 10136 transitions. [2020-11-11 15:24:10,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:10,275 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:10,275 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:10,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-11-11 15:24:10,475 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:10,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:10,476 INFO L82 PathProgramCache]: Analyzing trace with hash -393441758, now seen corresponding path program 271 times [2020-11-11 15:24:10,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:10,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352222537] [2020-11-11 15:24:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:11,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352222537] [2020-11-11 15:24:11,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721639610] [2020-11-11 15:24:11,567 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:11,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:24:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:11,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:11,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:11,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:11,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2020-11-11 15:24:11,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212388530] [2020-11-11 15:24:11,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-11 15:24:11,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:11,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-11 15:24:11,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2020-11-11 15:24:11,812 INFO L87 Difference]: Start difference. First operand 3637 states and 10136 transitions. Second operand has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:13,893 INFO L93 Difference]: Finished difference Result 5005 states and 13320 transitions. [2020-11-11 15:24:13,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:24:13,895 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 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 146 [2020-11-11 15:24:13,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:13,901 INFO L225 Difference]: With dead ends: 5005 [2020-11-11 15:24:13,902 INFO L226 Difference]: Without dead ends: 4671 [2020-11-11 15:24:13,902 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1020, Invalid=2762, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:24:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2020-11-11 15:24:13,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 3722. [2020-11-11 15:24:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 2.7696855683955928) internal successors, (10306), 3721 states have internal predecessors, (10306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 10306 transitions. [2020-11-11 15:24:13,954 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 10306 transitions. Word has length 146 [2020-11-11 15:24:13,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:13,954 INFO L481 AbstractCegarLoop]: Abstraction has 3722 states and 10306 transitions. [2020-11-11 15:24:13,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:13,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 10306 transitions. [2020-11-11 15:24:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:13,957 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:13,957 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:14,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:14,158 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:14,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:14,159 INFO L82 PathProgramCache]: Analyzing trace with hash -657761712, now seen corresponding path program 272 times [2020-11-11 15:24:14,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:14,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418687838] [2020-11-11 15:24:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:15,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418687838] [2020-11-11 15:24:15,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258726249] [2020-11-11 15:24:15,226 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:15,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:24:15,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:15,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:15,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:15,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:15,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:15,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-11-11 15:24:15,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449580954] [2020-11-11 15:24:15,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:24:15,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:15,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:24:15,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:24:15,384 INFO L87 Difference]: Start difference. First operand 3722 states and 10306 transitions. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:17,073 INFO L93 Difference]: Finished difference Result 5870 states and 14730 transitions. [2020-11-11 15:24:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:24:17,075 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2020-11-11 15:24:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:17,082 INFO L225 Difference]: With dead ends: 5870 [2020-11-11 15:24:17,082 INFO L226 Difference]: Without dead ends: 5600 [2020-11-11 15:24:17,082 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=854, Invalid=2226, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:24:17,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5600 states. [2020-11-11 15:24:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5600 to 3737. [2020-11-11 15:24:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:24:17,138 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:24:17,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:17,138 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:24:17,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:24:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:17,142 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:17,142 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:17,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:17,342 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:17,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:17,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1800332480, now seen corresponding path program 273 times [2020-11-11 15:24:17,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:17,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925047007] [2020-11-11 15:24:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:18,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925047007] [2020-11-11 15:24:18,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990515703] [2020-11-11 15:24:18,468 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:18,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-11-11 15:24:18,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:18,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:18,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:18,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:24:18,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:18,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:18,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:24:18,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305995739] [2020-11-11 15:24:18,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:18,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:18,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:18,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:18,700 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:24:20,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:20,732 INFO L93 Difference]: Finished difference Result 5755 states and 14500 transitions. [2020-11-11 15:24:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:24:20,733 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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 146 [2020-11-11 15:24:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:20,740 INFO L225 Difference]: With dead ends: 5755 [2020-11-11 15:24:20,741 INFO L226 Difference]: Without dead ends: 5485 [2020-11-11 15:24:20,741 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:24:20,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5485 states. [2020-11-11 15:24:20,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5485 to 3737. [2020-11-11 15:24:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:20,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:24:20,794 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:24:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:20,795 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:24:20,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:24:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:24:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:20,798 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:20,798 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:20,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:20,999 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:20,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1860799218, now seen corresponding path program 274 times [2020-11-11 15:24:20,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:20,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927502656] [2020-11-11 15:24:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:22,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927502656] [2020-11-11 15:24:22,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798973945] [2020-11-11 15:24:22,040 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:22,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:24:22,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:22,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-11 15:24:22,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:22,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:22,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:22,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-11-11 15:24:22,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497891055] [2020-11-11 15:24:22,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:24:22,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:22,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:24:22,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:24:22,206 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:24,092 INFO L93 Difference]: Finished difference Result 5730 states and 14450 transitions. [2020-11-11 15:24:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:24:24,094 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2020-11-11 15:24:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:24,101 INFO L225 Difference]: With dead ends: 5730 [2020-11-11 15:24:24,102 INFO L226 Difference]: Without dead ends: 5460 [2020-11-11 15:24:24,102 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=855, Invalid=2451, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:24:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5460 states. [2020-11-11 15:24:24,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5460 to 3737. [2020-11-11 15:24:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:24:24,156 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:24:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:24,156 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:24:24,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:24:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:24,159 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:24,159 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:24,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:24,360 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:24,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:24,360 INFO L82 PathProgramCache]: Analyzing trace with hash 706454014, now seen corresponding path program 275 times [2020-11-11 15:24:24,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:24,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620269166] [2020-11-11 15:24:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:25,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620269166] [2020-11-11 15:24:25,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414985080] [2020-11-11 15:24:25,461 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:25,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-11 15:24:25,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:25,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:25,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:25,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:24:25,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:25,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:25,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:24:25,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528938755] [2020-11-11 15:24:25,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:25,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:25,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:25,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:25,691 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:24:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:27,913 INFO L93 Difference]: Finished difference Result 5680 states and 14350 transitions. [2020-11-11 15:24:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:24:27,915 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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 146 [2020-11-11 15:24:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:27,922 INFO L225 Difference]: With dead ends: 5680 [2020-11-11 15:24:27,922 INFO L226 Difference]: Without dead ends: 5410 [2020-11-11 15:24:27,923 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=938, Invalid=2844, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:24:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2020-11-11 15:24:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 3737. [2020-11-11 15:24:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:24:27,977 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:24:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:27,977 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:24:27,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:24:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:24:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:27,980 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:27,980 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:28,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:28,181 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:28,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:28,182 INFO L82 PathProgramCache]: Analyzing trace with hash -226343604, now seen corresponding path program 276 times [2020-11-11 15:24:28,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:28,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794273770] [2020-11-11 15:24:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:29,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794273770] [2020-11-11 15:24:29,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073929173] [2020-11-11 15:24:29,179 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:29,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-11 15:24:29,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:29,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:29,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:29,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:29,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:29,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-11-11 15:24:29,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959573603] [2020-11-11 15:24:29,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:24:29,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:29,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:24:29,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:24:29,360 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:31,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:31,385 INFO L93 Difference]: Finished difference Result 5630 states and 14250 transitions. [2020-11-11 15:24:31,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:24:31,387 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2020-11-11 15:24:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:31,394 INFO L225 Difference]: With dead ends: 5630 [2020-11-11 15:24:31,394 INFO L226 Difference]: Without dead ends: 5360 [2020-11-11 15:24:31,395 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=872, Invalid=2668, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:24:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5360 states. [2020-11-11 15:24:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5360 to 3737. [2020-11-11 15:24:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:24:31,448 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:24:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:31,448 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:24:31,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:31,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:24:31,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:31,451 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:31,451 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:31,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-11-11 15:24:31,652 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:31,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2025709116, now seen corresponding path program 277 times [2020-11-11 15:24:31,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:31,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57223139] [2020-11-11 15:24:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:32,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57223139] [2020-11-11 15:24:32,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641249730] [2020-11-11 15:24:32,822 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:32,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:32,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:32,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:24:33,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:33,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:33,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:24:33,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897148497] [2020-11-11 15:24:33,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:33,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:33,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:33,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:33,035 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:24:35,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:35,490 INFO L93 Difference]: Finished difference Result 5580 states and 14150 transitions. [2020-11-11 15:24:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:24:35,492 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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 146 [2020-11-11 15:24:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:35,499 INFO L225 Difference]: With dead ends: 5580 [2020-11-11 15:24:35,499 INFO L226 Difference]: Without dead ends: 5310 [2020-11-11 15:24:35,499 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=963, Invalid=3069, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:24:35,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2020-11-11 15:24:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 3737. [2020-11-11 15:24:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:24:35,579 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:24:35,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:35,579 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:24:35,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:24:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:24:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:35,582 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:35,583 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:35,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-11-11 15:24:35,787 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:35,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:35,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1189849866, now seen corresponding path program 278 times [2020-11-11 15:24:35,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:35,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738069648] [2020-11-11 15:24:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:36,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738069648] [2020-11-11 15:24:36,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155120731] [2020-11-11 15:24:36,746 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:36,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:24:36,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:36,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:36,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:36,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:36,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:36,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-11-11 15:24:36,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121783220] [2020-11-11 15:24:36,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:24:36,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:36,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:24:36,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:24:36,907 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:39,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:39,185 INFO L93 Difference]: Finished difference Result 5530 states and 14050 transitions. [2020-11-11 15:24:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:24:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2020-11-11 15:24:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:39,193 INFO L225 Difference]: With dead ends: 5530 [2020-11-11 15:24:39,194 INFO L226 Difference]: Without dead ends: 5260 [2020-11-11 15:24:39,194 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=905, Invalid=2877, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:24:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5260 states. [2020-11-11 15:24:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5260 to 3737. [2020-11-11 15:24:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:24:39,266 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:24:39,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:39,267 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:24:39,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:24:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:39,270 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:39,270 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:39,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-11-11 15:24:39,471 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1422610438, now seen corresponding path program 279 times [2020-11-11 15:24:39,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:39,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586810673] [2020-11-11 15:24:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:40,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586810673] [2020-11-11 15:24:40,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743203182] [2020-11-11 15:24:40,461 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:40,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-11-11 15:24:40,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:40,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-11 15:24:40,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:40,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:40,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:40,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:24:40,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182093516] [2020-11-11 15:24:40,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:40,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:40,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:40,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:40,698 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:24:43,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:43,216 INFO L93 Difference]: Finished difference Result 5480 states and 13950 transitions. [2020-11-11 15:24:43,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:24:43,218 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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 146 [2020-11-11 15:24:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:43,224 INFO L225 Difference]: With dead ends: 5480 [2020-11-11 15:24:43,224 INFO L226 Difference]: Without dead ends: 5210 [2020-11-11 15:24:43,225 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=914, Invalid=3118, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:24:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2020-11-11 15:24:43,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 3737. [2020-11-11 15:24:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:43,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:24:43,275 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:24:43,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:43,275 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:24:43,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:24:43,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:24:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:43,279 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:43,279 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:43,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2020-11-11 15:24:43,479 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:43,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:43,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1019709000, now seen corresponding path program 280 times [2020-11-11 15:24:43,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:43,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933195877] [2020-11-11 15:24:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:44,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933195877] [2020-11-11 15:24:44,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752617466] [2020-11-11 15:24:44,397 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:44,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:24:44,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:44,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-11 15:24:44,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:44,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:44,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:44,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-11-11 15:24:44,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579562024] [2020-11-11 15:24:44,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:24:44,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:44,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:24:44,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:24:44,571 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:46,971 INFO L93 Difference]: Finished difference Result 5430 states and 13850 transitions. [2020-11-11 15:24:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:24:46,973 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2020-11-11 15:24:46,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:46,978 INFO L225 Difference]: With dead ends: 5430 [2020-11-11 15:24:46,979 INFO L226 Difference]: Without dead ends: 5160 [2020-11-11 15:24:46,979 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=954, Invalid=3078, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:24:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2020-11-11 15:24:47,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 3737. [2020-11-11 15:24:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:24:47,029 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:24:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:47,029 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:24:47,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:24:47,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:47,033 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:47,033 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:47,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:47,234 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:47,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:47,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1085601592, now seen corresponding path program 281 times [2020-11-11 15:24:47,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:47,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186804847] [2020-11-11 15:24:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:48,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186804847] [2020-11-11 15:24:48,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836830182] [2020-11-11 15:24:48,216 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:48,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-11 15:24:48,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:48,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:48,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:48,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:24:48,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:48,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:48,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:24:48,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346451286] [2020-11-11 15:24:48,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:48,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:48,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:48,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:48,447 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:24:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:51,392 INFO L93 Difference]: Finished difference Result 5380 states and 13750 transitions. [2020-11-11 15:24:51,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:24:51,394 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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 146 [2020-11-11 15:24:51,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:51,400 INFO L225 Difference]: With dead ends: 5380 [2020-11-11 15:24:51,400 INFO L226 Difference]: Without dead ends: 5110 [2020-11-11 15:24:51,401 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:24:51,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5110 states. [2020-11-11 15:24:51,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5110 to 3737. [2020-11-11 15:24:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:24:51,452 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:24:51,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:51,452 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:24:51,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:24:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:24:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:51,456 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:51,456 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:51,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:51,657 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1159902982, now seen corresponding path program 282 times [2020-11-11 15:24:51,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:51,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565935711] [2020-11-11 15:24:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:52,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565935711] [2020-11-11 15:24:52,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575561835] [2020-11-11 15:24:52,559 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:52,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-11 15:24:52,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:52,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:52,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:52,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:52,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:52,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-11-11 15:24:52,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23462175] [2020-11-11 15:24:52,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:24:52,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:52,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:24:52,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:24:52,734 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:55,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:55,313 INFO L93 Difference]: Finished difference Result 5330 states and 13650 transitions. [2020-11-11 15:24:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:24:55,315 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2020-11-11 15:24:55,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:55,321 INFO L225 Difference]: With dead ends: 5330 [2020-11-11 15:24:55,322 INFO L226 Difference]: Without dead ends: 5060 [2020-11-11 15:24:55,322 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1019, Invalid=3271, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:24:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2020-11-11 15:24:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 3737. [2020-11-11 15:24:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:24:55,375 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:24:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:55,375 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:24:55,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:24:55,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:55,378 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:55,378 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:55,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:55,579 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:55,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:55,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1795920886, now seen corresponding path program 283 times [2020-11-11 15:24:55,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:55,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108334498] [2020-11-11 15:24:55,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:56,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108334498] [2020-11-11 15:24:56,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252459686] [2020-11-11 15:24:56,539 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:56,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:56,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:24:56,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:56,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:56,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:24:56,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823687600] [2020-11-11 15:24:56,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:56,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:56,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:56,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:56,762 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:25:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:00,015 INFO L93 Difference]: Finished difference Result 5280 states and 13550 transitions. [2020-11-11 15:25:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:25:00,017 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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 146 [2020-11-11 15:25:00,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:00,024 INFO L225 Difference]: With dead ends: 5280 [2020-11-11 15:25:00,024 INFO L226 Difference]: Without dead ends: 5010 [2020-11-11 15:25:00,024 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1134, Invalid=3696, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:25:00,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5010 states. [2020-11-11 15:25:00,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5010 to 3737. [2020-11-11 15:25:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:25:00,076 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:25:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:00,077 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:25:00,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:25:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:25:00,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:25:00,080 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:00,080 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:00,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:00,281 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:00,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1906449732, now seen corresponding path program 284 times [2020-11-11 15:25:00,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:00,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244387091] [2020-11-11 15:25:00,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:01,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244387091] [2020-11-11 15:25:01,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224747014] [2020-11-11 15:25:01,181 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:01,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:25:01,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:25:01,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:25:01,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:01,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:01,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:01,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-11-11 15:25:01,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044325283] [2020-11-11 15:25:01,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:25:01,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:01,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:25:01,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:25:01,377 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:04,099 INFO L93 Difference]: Finished difference Result 5230 states and 13450 transitions. [2020-11-11 15:25:04,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:25:04,101 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2020-11-11 15:25:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:04,107 INFO L225 Difference]: With dead ends: 5230 [2020-11-11 15:25:04,107 INFO L226 Difference]: Without dead ends: 4960 [2020-11-11 15:25:04,108 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1100, Invalid=3456, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:25:04,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4960 states. [2020-11-11 15:25:04,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4960 to 3737. [2020-11-11 15:25:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:25:04,159 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:25:04,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:04,160 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:25:04,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:25:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:25:04,163 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:04,163 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:04,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable295 [2020-11-11 15:25:04,364 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:04,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:04,364 INFO L82 PathProgramCache]: Analyzing trace with hash -325229004, now seen corresponding path program 285 times [2020-11-11 15:25:04,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:04,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392298200] [2020-11-11 15:25:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:05,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392298200] [2020-11-11 15:25:05,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760558766] [2020-11-11 15:25:05,314 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:05,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-11-11 15:25:05,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:25:05,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-11 15:25:05,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:05,525 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:05,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:05,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:25:05,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264044587] [2020-11-11 15:25:05,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:25:05,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:05,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:25:05,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:25:05,550 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:25:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:08,737 INFO L93 Difference]: Finished difference Result 5180 states and 13350 transitions. [2020-11-11 15:25:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:25:08,739 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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 146 [2020-11-11 15:25:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:08,746 INFO L225 Difference]: With dead ends: 5180 [2020-11-11 15:25:08,746 INFO L226 Difference]: Without dead ends: 4910 [2020-11-11 15:25:08,747 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1079, Invalid=3751, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:25:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2020-11-11 15:25:08,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 3737. [2020-11-11 15:25:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:08,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:25:08,799 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:25:08,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:08,799 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:25:08,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:25:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:25:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:25:08,803 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:08,803 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:09,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:09,003 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:09,004 INFO L82 PathProgramCache]: Analyzing trace with hash -763193086, now seen corresponding path program 286 times [2020-11-11 15:25:09,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:09,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131809788] [2020-11-11 15:25:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:09,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131809788] [2020-11-11 15:25:09,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968358380] [2020-11-11 15:25:09,957 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:10,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:25:10,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:25:10,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-11 15:25:10,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:10,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:10,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:10,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-11-11 15:25:10,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62348547] [2020-11-11 15:25:10,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:25:10,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:10,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:25:10,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:25:10,150 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:13,085 INFO L93 Difference]: Finished difference Result 5130 states and 13250 transitions. [2020-11-11 15:25:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:25:13,087 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2020-11-11 15:25:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:13,094 INFO L225 Difference]: With dead ends: 5130 [2020-11-11 15:25:13,094 INFO L226 Difference]: Without dead ends: 4860 [2020-11-11 15:25:13,095 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1197, Invalid=3633, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:25:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4860 states. [2020-11-11 15:25:13,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4860 to 3737. [2020-11-11 15:25:13,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:25:13,169 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:25:13,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:13,169 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:25:13,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:25:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:25:13,173 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:13,173 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:13,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:13,373 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:13,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:13,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1986481650, now seen corresponding path program 287 times [2020-11-11 15:25:13,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:13,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452781411] [2020-11-11 15:25:13,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:14,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452781411] [2020-11-11 15:25:14,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593761090] [2020-11-11 15:25:14,280 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:14,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-11 15:25:14,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:25:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:25:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:14,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:25:14,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:14,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:14,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:25:14,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888418929] [2020-11-11 15:25:14,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:25:14,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:14,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:25:14,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:25:14,512 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:25:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:18,127 INFO L93 Difference]: Finished difference Result 5080 states and 13150 transitions. [2020-11-11 15:25:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-11 15:25:18,129 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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 146 [2020-11-11 15:25:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:18,135 INFO L225 Difference]: With dead ends: 5080 [2020-11-11 15:25:18,135 INFO L226 Difference]: Without dead ends: 4810 [2020-11-11 15:25:18,137 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1328, Invalid=4074, Unknown=0, NotChecked=0, Total=5402 [2020-11-11 15:25:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2020-11-11 15:25:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 3737. [2020-11-11 15:25:18,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:25:18,202 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:25:18,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:18,202 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:25:18,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:25:18,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:25:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:25:18,205 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:18,206 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:18,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:18,406 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:18,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:18,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1419315776, now seen corresponding path program 288 times [2020-11-11 15:25:18,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:18,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977089666] [2020-11-11 15:25:18,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:19,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977089666] [2020-11-11 15:25:19,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624567797] [2020-11-11 15:25:19,344 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:19,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-11 15:25:19,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:25:19,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-11 15:25:19,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:19,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:19,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:19,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-11-11 15:25:19,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782933795] [2020-11-11 15:25:19,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:25:19,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:25:19,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:25:19,529 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:22,591 INFO L93 Difference]: Finished difference Result 5030 states and 13050 transitions. [2020-11-11 15:25:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 15:25:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2020-11-11 15:25:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:22,599 INFO L225 Difference]: With dead ends: 5030 [2020-11-11 15:25:22,599 INFO L226 Difference]: Without dead ends: 4760 [2020-11-11 15:25:22,599 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2020-11-11 15:25:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2020-11-11 15:25:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 3737. [2020-11-11 15:25:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:25:22,649 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:25:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:22,649 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:25:22,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:25:22,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:25:22,653 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:22,653 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:22,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-11-11 15:25:22,853 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:22,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:22,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2046940368, now seen corresponding path program 289 times [2020-11-11 15:25:22,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:22,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722524955] [2020-11-11 15:25:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:23,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722524955] [2020-11-11 15:25:23,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268258906] [2020-11-11 15:25:23,763 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:23,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:25:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:23,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:25:23,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:23,985 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:23,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:23,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:25:23,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271946823] [2020-11-11 15:25:23,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:25:23,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:23,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:25:23,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:25:23,987 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:25:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:27,855 INFO L93 Difference]: Finished difference Result 4980 states and 12950 transitions. [2020-11-11 15:25:27,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-11 15:25:27,857 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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 146 [2020-11-11 15:25:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:27,864 INFO L225 Difference]: With dead ends: 4980 [2020-11-11 15:25:27,864 INFO L226 Difference]: Without dead ends: 4710 [2020-11-11 15:25:27,865 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1449, Invalid=4251, Unknown=0, NotChecked=0, Total=5700 [2020-11-11 15:25:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4710 states. [2020-11-11 15:25:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4710 to 3737. [2020-11-11 15:25:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:25:27,916 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:25:27,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:27,916 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:25:27,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) [2020-11-11 15:25:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:25:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:25:27,919 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:27,919 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:28,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:28,120 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:28,121 INFO L82 PathProgramCache]: Analyzing trace with hash 525488382, now seen corresponding path program 290 times [2020-11-11 15:25:28,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:28,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121246182] [2020-11-11 15:25:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:28,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121246182] [2020-11-11 15:25:28,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611819716] [2020-11-11 15:25:28,998 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:29,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:25:29,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:25:29,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:25:29,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:29,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:29,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:29,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-11-11 15:25:29,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502941096] [2020-11-11 15:25:29,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:25:29,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:29,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:25:29,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:25:29,204 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:32,422 INFO L93 Difference]: Finished difference Result 4930 states and 12850 transitions. [2020-11-11 15:25:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-11 15:25:32,424 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2020-11-11 15:25:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:32,431 INFO L225 Difference]: With dead ends: 4930 [2020-11-11 15:25:32,431 INFO L226 Difference]: Without dead ends: 4660 [2020-11-11 15:25:32,432 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1439, Invalid=3963, Unknown=0, NotChecked=0, Total=5402 [2020-11-11 15:25:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2020-11-11 15:25:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 3737. [2020-11-11 15:25:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 2.766595289079229) internal successors, (10336), 3736 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 10336 transitions. [2020-11-11 15:25:32,483 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 10336 transitions. Word has length 146 [2020-11-11 15:25:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:32,483 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 10336 transitions. [2020-11-11 15:25:32,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 10336 transitions. [2020-11-11 15:25:32,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:25:32,486 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:32,486 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:32,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-11-11 15:25:32,687 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:32,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:32,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1014047250, now seen corresponding path program 291 times [2020-11-11 15:25:32,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:32,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415111235] [2020-11-11 15:25:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:33,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415111235] [2020-11-11 15:25:33,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263783684] [2020-11-11 15:25:33,619 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:33,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-11-11 15:25:33,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:25:33,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-11 15:25:33,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:33,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:33,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:33,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:25:33,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098010594] [2020-11-11 15:25:33,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:25:33,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:33,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:25:33,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:25:33,873 INFO L87 Difference]: Start difference. First operand 3737 states and 10336 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 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) Received shutdown request... [2020-11-11 15:25:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:25:35,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-11-11 15:25:35,134 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-11 15:25:35,140 WARN L250 ceAbstractionStarter]: Timeout [2020-11-11 15:25:35,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 03:25:35 BasicIcfg [2020-11-11 15:25:35,141 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 15:25:35,143 INFO L168 Benchmark]: Toolchain (without parser) took 812891.24 ms. Allocated memory was 302.0 MB in the beginning and 687.9 MB in the end (delta: 385.9 MB). Free memory was 271.6 MB in the beginning and 450.0 MB in the end (delta: -178.3 MB). Peak memory consumption was 209.1 MB. Max. memory is 16.0 GB. [2020-11-11 15:25:35,143 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 302.0 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 15:25:35,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 841.86 ms. Allocated memory is still 302.0 MB. Free memory was 271.0 MB in the beginning and 265.4 MB in the end (delta: 5.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2020-11-11 15:25:35,144 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.47 ms. Allocated memory is still 302.0 MB. Free memory was 265.4 MB in the beginning and 264.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 15:25:35,144 INFO L168 Benchmark]: Boogie Preprocessor took 75.97 ms. Allocated memory is still 302.0 MB. Free memory was 264.4 MB in the beginning and 262.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 15:25:35,145 INFO L168 Benchmark]: RCFGBuilder took 587.07 ms. Allocated memory is still 302.0 MB. Free memory was 262.3 MB in the beginning and 241.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2020-11-11 15:25:35,145 INFO L168 Benchmark]: TraceAbstraction took 811287.23 ms. Allocated memory was 302.0 MB in the beginning and 687.9 MB in the end (delta: 385.9 MB). Free memory was 241.3 MB in the beginning and 450.0 MB in the end (delta: -208.6 MB). Peak memory consumption was 181.4 MB. Max. memory is 16.0 GB. [2020-11-11 15:25:35,147 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 302.0 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 841.86 ms. Allocated memory is still 302.0 MB. Free memory was 271.0 MB in the beginning and 265.4 MB in the end (delta: 5.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 83.47 ms. Allocated memory is still 302.0 MB. Free memory was 265.4 MB in the beginning and 264.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 75.97 ms. Allocated memory is still 302.0 MB. Free memory was 264.4 MB in the beginning and 262.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 587.07 ms. Allocated memory is still 302.0 MB. Free memory was 262.3 MB in the beginning and 241.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 811287.23 ms. Allocated memory was 302.0 MB in the beginning and 687.9 MB in the end (delta: 385.9 MB). Free memory was 241.3 MB in the beginning and 450.0 MB in the end (delta: -208.6 MB). Peak memory consumption was 181.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 685]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 685). Cancelled while BasicCegarLoop was constructing difference of abstraction (3737states) and FLOYD_HOARE automaton (currently 19 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 46 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 811.1s, OverallIterations: 303, TraceHistogramMax: 12, AutomataDifference: 507.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 27132 SDtfs, 245700 SDslu, 266177 SDs, 0 SdLazy, 50541 SolverSat, 41586 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 71.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46208 GetRequests, 31508 SyntacticMatches, 277 SemanticMatches, 14422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184703 ImplicationChecksByTransitivity, 535.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3737occurred in iteration=284, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 14.2s AutomataMinimizationTime, 302 MinimizatonAttempts, 290301 StatesRemovedByMinimization, 302 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.2s SsaConstructionTime, 14.6s SatisfiabilityAnalysisTime, 190.3s InterpolantComputationTime, 63818 NumberOfCodeBlocks, 63818 NumberOfCodeBlocksAsserted, 1866 NumberOfCheckSat, 63219 ConstructedInterpolants, 0 QuantifiedInterpolants, 31082069 SizeOfPredicates, 5763 NumberOfNonLiveVariables, 64600 ConjunctsInSsa, 7012 ConjunctsInUnsatCore, 599 InterpolantComputations, 7 PerfectInterpolantSequences, 0/170908 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown